<p dir="auto">I have no idea what is going on. I had no problem with python 3.7.3 32 bits version.</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="    ERROR: Complete output from command 'c:\users\xxxxx\appdata\local\programs\python\python37\python.exe' -u -c 'import setuptools, tokenize;__file__='&quot;'&quot;'C:\\Users\\XXXXX\\AppData\\Local\\Temp\\pip-install-9pfqvjxq\\Twisted\\setup.py'&quot;'&quot;';f=getattr(tokenize, '&quot;'&quot;'open'&quot;'&quot;', open)(__file__);code=f.read().replace('&quot;'&quot;'\r\n'&quot;'&quot;', '&quot;'&quot;'\n'&quot;'&quot;');f.close();exec(compile(code, __file__, '&quot;'&quot;'exec'&quot;'&quot;'))' install --record 'C:\Users\XXXXX\AppData\Local\Temp\pip-record-lls0x5g5\install-record.txt' --single-version-externally-managed --compile:
    ERROR: running install
    running build
    running build_py
    creating build
    creating build\lib.win-amd64-3.7
    creating build\lib.win-amd64-3.7\twisted
    copying src\twisted\copyright.py -&gt; build\lib.win-amd64-3.7\twisted
    copying src\twisted\plugin.py -&gt; build\lib.win-amd64-3.7\twisted
    copying src\twisted\_version.py -&gt; build\lib.win-amd64-3.7\twisted
    copying src\twisted\__init__.py -&gt; build\lib.win-amd64-3.7\twisted
    copying src\twisted\__main__.py -&gt; build\lib.win-amd64-3.7\twisted
    creating build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\app.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\internet.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\reactors.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\service.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\strports.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\application
    creating build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\avatar.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\checkers.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\endpoints.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\error.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\interfaces.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\ls.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\manhole.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\manhole_ssh.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\manhole_tap.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\mixin.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\recvline.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\stdio.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\tap.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\telnet.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\ttymodes.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\unix.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    creating build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\checkers.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\credentials.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\error.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\portal.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\strcred.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\_digest.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    creating build\lib.win-amd64-3.7\twisted\enterprise
    copying src\twisted\enterprise\adbapi.py -&gt; build\lib.win-amd64-3.7\twisted\enterprise
    copying src\twisted\enterprise\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\enterprise
    creating build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\abstract.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\address.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\asyncioreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\base.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\cfreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\default.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\defer.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\endpoints.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\epollreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\error.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\fdesc.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\gireactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\glib2reactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\gtk2reactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\gtk3reactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\inotify.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\interfaces.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\kqreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\main.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\pollreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\posixbase.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\process.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\protocol.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\pyuisupport.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\reactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\selectreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\serialport.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\ssl.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\stdio.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\task.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\tcp.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\threads.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\tksupport.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\udp.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\unix.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\utils.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\win32eventreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\wxreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\wxsupport.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_baseprocess.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_dumbwin32proc.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_glibbase.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_idna.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_newtls.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_pollingfile.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_posixserialport.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_posixstdio.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_producer_helpers.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_resolver.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_signals.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_sslverify.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_threadedselect.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_win32serialport.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\_win32stdio.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    creating build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_buffer.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_file.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_filter.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_flatten.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_format.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_global.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_io.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_json.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_legacy.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_levels.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_logger.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_observer.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_stdlib.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\_util.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    copying src\twisted\logger\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\logger
    creating build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\imap4.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\interfaces.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\pop3.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\pop3client.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\protocols.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\relay.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\smtp.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\_cred.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\_except.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    copying src\twisted\mail\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\mail
    creating build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\authority.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\cache.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\client.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\common.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\dns.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\error.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\hosts.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\resolve.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\root.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\secondary.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\server.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\srvconnect.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\tap.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\_rfc1982.py -&gt; build\lib.win-amd64-3.7\twisted\names
    copying src\twisted\names\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\names
    creating build\lib.win-amd64-3.7\twisted\pair
    copying src\twisted\pair\ethernet.py -&gt; build\lib.win-amd64-3.7\twisted\pair
    copying src\twisted\pair\ip.py -&gt; build\lib.win-amd64-3.7\twisted\pair
    copying src\twisted\pair\raw.py -&gt; build\lib.win-amd64-3.7\twisted\pair
    copying src\twisted\pair\rawudp.py -&gt; build\lib.win-amd64-3.7\twisted\pair
    copying src\twisted\pair\testing.py -&gt; build\lib.win-amd64-3.7\twisted\pair
    copying src\twisted\pair\tuntap.py -&gt; build\lib.win-amd64-3.7\twisted\pair
    copying src\twisted\pair\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\pair
    creating build\lib.win-amd64-3.7\twisted\persisted
    copying src\twisted\persisted\aot.py -&gt; build\lib.win-amd64-3.7\twisted\persisted
    copying src\twisted\persisted\crefutil.py -&gt; build\lib.win-amd64-3.7\twisted\persisted
    copying src\twisted\persisted\dirdbm.py -&gt; build\lib.win-amd64-3.7\twisted\persisted
    copying src\twisted\persisted\sob.py -&gt; build\lib.win-amd64-3.7\twisted\persisted
    copying src\twisted\persisted\styles.py -&gt; build\lib.win-amd64-3.7\twisted\persisted
    copying src\twisted\persisted\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\persisted
    creating build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\cred_anonymous.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\cred_file.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\cred_memory.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\cred_sshkeys.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\cred_unix.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_conch.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_core.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_ftp.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_inet.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_names.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_portforward.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_reactors.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_runner.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_socks.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_trial.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_web.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\twisted_words.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    copying src\twisted\plugins\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\plugins
    creating build\lib.win-amd64-3.7\twisted\positioning
    copying src\twisted\positioning\base.py -&gt; build\lib.win-amd64-3.7\twisted\positioning
    copying src\twisted\positioning\ipositioning.py -&gt; build\lib.win-amd64-3.7\twisted\positioning
    copying src\twisted\positioning\nmea.py -&gt; build\lib.win-amd64-3.7\twisted\positioning
    copying src\twisted\positioning\_sentence.py -&gt; build\lib.win-amd64-3.7\twisted\positioning
    copying src\twisted\positioning\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\positioning
    creating build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\amp.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\basic.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\dict.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\finger.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\ftp.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\htb.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\ident.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\loopback.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\memcache.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\pcp.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\policies.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\portforward.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\postfix.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\sip.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\socks.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\stateful.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\tls.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\wire.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    copying src\twisted\protocols\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\protocols
    creating build\lib.win-amd64-3.7\twisted\python
    copying src\twisted\python\compat.py -&gt; build\lib.win-amd64-3.7\twisted\python
    copying src\twisted\python\components.py -&gt; build\lib.win-amd64-3.7\twisted\python
    copying src\twisted\python\constants.py -&gt; build\lib.win-amd64-3.7\twisted\python
    copying src\twisted\python\context.py -&gt; build\lib.win-amd64-3.7\twisted\python
    copying src\twisted\python\deprecate.py -&gt; build\lib.win-amd64-3.7\twisted\python
    copying src\twisted\python\failure.py -&gt; build\lib.win-amd64-3.7\twisted\python
    copying src\twisted\python\fakepwd.py -&gt; build\lib.win-amd64-3.7\twisted\python
    copying src\twisted\python\filepath.py -&gt; build\lib.win-amd64-3.7\twisted\python
    copying src\twisted\python\formmethod.py -&gt; build\lib.win-amd64-3.7\twisted\python
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    copying src\twisted\words\iwords.py -&gt; build\lib.win-amd64-3.7\twisted\words
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    copying src\twisted\words\xmpproutertap.py -&gt; build\lib.win-amd64-3.7\twisted\words
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    copying src\twisted\_threads\_memory.py -&gt; build\lib.win-amd64-3.7\twisted\_threads
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    copying src\twisted\application\runner\_runner.py -&gt; build\lib.win-amd64-3.7\twisted\application\runner
    copying src\twisted\application\runner\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\application\runner
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    copying src\twisted\application\test\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\application\test
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    copying src\twisted\application\twist\_twist.py -&gt; build\lib.win-amd64-3.7\twisted\application\twist
    copying src\twisted\application\twist\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\application\twist
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    copying src\twisted\application\runner\test\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\application\runner\test
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    copying src\twisted\application\twist\test\test_twist.py -&gt; build\lib.win-amd64-3.7\twisted\application\twist\test
    copying src\twisted\application\twist\test\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\application\twist\test
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    copying src\twisted\conch\client\default.py -&gt; build\lib.win-amd64-3.7\twisted\conch\client
    copying src\twisted\conch\client\direct.py -&gt; build\lib.win-amd64-3.7\twisted\conch\client
    copying src\twisted\conch\client\knownhosts.py -&gt; build\lib.win-amd64-3.7\twisted\conch\client
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    copying src\twisted\conch\client\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\conch\client
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    copying src\twisted\conch\insults\colors.py -&gt; build\lib.win-amd64-3.7\twisted\conch\insults
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    copying src\twisted\conch\insults\insults.py -&gt; build\lib.win-amd64-3.7\twisted\conch\insults
    copying src\twisted\conch\insults\text.py -&gt; build\lib.win-amd64-3.7\twisted\conch\insults
    copying src\twisted\conch\insults\window.py -&gt; build\lib.win-amd64-3.7\twisted\conch\insults
    copying src\twisted\conch\insults\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\conch\insults
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    copying src\twisted\conch\scripts\ckeygen.py -&gt; build\lib.win-amd64-3.7\twisted\conch\scripts
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    copying src\twisted\conch\scripts\tkconch.py -&gt; build\lib.win-amd64-3.7\twisted\conch\scripts
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    copying src\twisted\cred\test\test_digestauth.py -&gt; build\lib.win-amd64-3.7\twisted\cred\test
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    copying src\twisted\internet\iocpreactor\const.py -&gt; build\lib.win-amd64-3.7\twisted\internet\iocpreactor
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    copying src\twisted\internet\iocpreactor\tcp.py -&gt; build\lib.win-amd64-3.7\twisted\internet\iocpreactor
    copying src\twisted\internet\iocpreactor\udp.py -&gt; build\lib.win-amd64-3.7\twisted\internet\iocpreactor
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    copying src\twisted\web\test\test_web__responses.py -&gt; build\lib.win-amd64-3.7\twisted\web\test
    copying src\twisted\web\test\test_wsgi.py -&gt; build\lib.win-amd64-3.7\twisted\web\test
    copying src\twisted\web\test\test_xml.py -&gt; build\lib.win-amd64-3.7\twisted\web\test
    copying src\twisted\web\test\test_xmlrpc.py -&gt; build\lib.win-amd64-3.7\twisted\web\test
    copying src\twisted\web\test\_util.py -&gt; build\lib.win-amd64-3.7\twisted\web\test
    copying src\twisted\web\test\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\web\test
    creating build\lib.win-amd64-3.7\twisted\web\_auth
    copying src\twisted\web\_auth\basic.py -&gt; build\lib.win-amd64-3.7\twisted\web\_auth
    copying src\twisted\web\_auth\digest.py -&gt; build\lib.win-amd64-3.7\twisted\web\_auth
    copying src\twisted\web\_auth\wrapper.py -&gt; build\lib.win-amd64-3.7\twisted\web\_auth
    copying src\twisted\web\_auth\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\web\_auth
    creating build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\im\baseaccount.py -&gt; build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\im\basechat.py -&gt; build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\im\basesupport.py -&gt; build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\im\interfaces.py -&gt; build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\im\ircsupport.py -&gt; build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\im\locals.py -&gt; build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\im\pbsupport.py -&gt; build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\im\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\words\im
    creating build\lib.win-amd64-3.7\twisted\words\protocols
    copying src\twisted\words\protocols\irc.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols
    copying src\twisted\words\protocols\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols
    creating build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_basechat.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_basesupport.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_domish.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_irc.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_ircsupport.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_irc_service.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_jabberclient.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_jabbercomponent.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_jabbererror.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_jabberjid.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_jabberjstrports.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_jabbersasl.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_jabbersaslmechanisms.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_jabberxmlstream.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_jabberxmppstringprep.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_service.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_tap.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_xishutil.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_xmlstream.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_xmpproutertap.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\test_xpath.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    copying src\twisted\words\test\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\words\test
    creating build\lib.win-amd64-3.7\twisted\words\xish
    copying src\twisted\words\xish\domish.py -&gt; build\lib.win-amd64-3.7\twisted\words\xish
    copying src\twisted\words\xish\utility.py -&gt; build\lib.win-amd64-3.7\twisted\words\xish
    copying src\twisted\words\xish\xmlstream.py -&gt; build\lib.win-amd64-3.7\twisted\words\xish
    copying src\twisted\words\xish\xpath.py -&gt; build\lib.win-amd64-3.7\twisted\words\xish
    copying src\twisted\words\xish\xpathparser.py -&gt; build\lib.win-amd64-3.7\twisted\words\xish
    copying src\twisted\words\xish\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\words\xish
    creating build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\client.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\component.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\error.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\ijabber.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\jid.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\jstrports.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\sasl.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\sasl_mechanisms.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\xmlstream.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\xmpp_stringprep.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    copying src\twisted\words\protocols\jabber\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\words\protocols\jabber
    creating build\lib.win-amd64-3.7\twisted\_threads\test
    copying src\twisted\_threads\test\test_convenience.py -&gt; build\lib.win-amd64-3.7\twisted\_threads\test
    copying src\twisted\_threads\test\test_memory.py -&gt; build\lib.win-amd64-3.7\twisted\_threads\test
    copying src\twisted\_threads\test\test_team.py -&gt; build\lib.win-amd64-3.7\twisted\_threads\test
    copying src\twisted\_threads\test\test_threadworker.py -&gt; build\lib.win-amd64-3.7\twisted\_threads\test
    copying src\twisted\_threads\test\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\_threads\test
    running egg_info
    writing src\Twisted.egg-info\PKG-INFO
    writing dependency_links to src\Twisted.egg-info\dependency_links.txt
    writing entry points to src\Twisted.egg-info\entry_points.txt
    writing requirements to src\Twisted.egg-info\requires.txt
    writing top-level names to src\Twisted.egg-info\top_level.txt
    reading manifest file 'src\Twisted.egg-info\SOURCES.txt'
    reading manifest template 'MANIFEST.in'
    warning: no previously-included files matching '*.misc' found under directory 'src\twisted'
    warning: no previously-included files matching '*.bugfix' found under directory 'src\twisted'
    warning: no previously-included files matching '*.doc' found under directory 'src\twisted'
    warning: no previously-included files matching '*.feature' found under directory 'src\twisted'
    warning: no previously-included files matching '*.removal' found under directory 'src\twisted'
    warning: no previously-included files matching 'NEWS' found under directory 'src\twisted'
    warning: no previously-included files matching 'README' found under directory 'src\twisted'
    warning: no previously-included files matching 'newsfragments' found under directory 'src\twisted'
    warning: no previously-included files found matching 'src\twisted\topfiles\CREDITS'
    warning: no previously-included files found matching 'src\twisted\topfiles\ChangeLog.Old'
    warning: no previously-included files found matching 'pyproject.toml'
    warning: no previously-included files found matching 'codecov.yml'
    warning: no previously-included files found matching 'appveyor.yml'
    warning: no previously-included files found matching '.circleci'
    warning: no previously-included files matching '*' found under directory '.circleci'
    no previously-included directories found matching 'bin'
    no previously-included directories found matching 'admin'
    no previously-included directories found matching '.travis'
    no previously-included directories found matching '.github'
    warning: no previously-included files found matching 'docs\historic\2003'
    warning: no previously-included files matching '*' found under directory 'docs\historic\2003'
    writing manifest file 'src\Twisted.egg-info\SOURCES.txt'
    copying src\twisted\python\twisted-completion.zsh -&gt; build\lib.win-amd64-3.7\twisted\python
    creating build\lib.win-amd64-3.7\twisted\python\_pydoctortemplates
    copying src\twisted\python\_pydoctortemplates\common.html -&gt; build\lib.win-amd64-3.7\twisted\python\_pydoctortemplates
    copying src\twisted\python\_pydoctortemplates\index.html -&gt; build\lib.win-amd64-3.7\twisted\python\_pydoctortemplates
    copying src\twisted\python\_pydoctortemplates\summary.html -&gt; build\lib.win-amd64-3.7\twisted\python\_pydoctortemplates
    copying src\twisted\test\cert.pem.no_trailing_newline -&gt; build\lib.win-amd64-3.7\twisted\test
    copying src\twisted\test\key.pem.no_trailing_newline -&gt; build\lib.win-amd64-3.7\twisted\test
    copying src\twisted\test\server.pem -&gt; build\lib.win-amd64-3.7\twisted\test
    copying src\twisted\test\test_defer.py.3only -&gt; build\lib.win-amd64-3.7\twisted\test
    copying src\twisted\internet\iocpreactor\notes.txt -&gt; build\lib.win-amd64-3.7\twisted\internet\iocpreactor
    copying src\twisted\internet\test\_awaittests.py.3only -&gt; build\lib.win-amd64-3.7\twisted\internet\test
    copying src\twisted\internet\test\_yieldfromtests.py.3only -&gt; build\lib.win-amd64-3.7\twisted\internet\test
    creating build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\chain.pem -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\not-a-certificate -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\thing1.pem -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\thing2-duplicate.pem -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\thing2.pem -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\mail\test\rfc822.message -&gt; build\lib.win-amd64-3.7\twisted\mail\test
    copying src\twisted\python\test\_deprecatetests.py.3only -&gt; build\lib.win-amd64-3.7\twisted\python\test
    copying src\twisted\words\im\instancemessenger.glade -&gt; build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\xish\xpathparser.g -&gt; build\lib.win-amd64-3.7\twisted\words\xish
    running build_ext
    building 'twisted.test.raiser' extension
    error: Microsoft Visual C++ 14.0 is required. Get it with &quot;Microsoft Visual C++ Build Tools&quot;: https://visualstudio.microsoft.com/downloads/
    ----------------------------------------
ERROR: Command &quot;'c:\users\xxxxx\appdata\local\programs\python\python37\python.exe' -u -c 'import setuptools, tokenize;__file__='&quot;'&quot;'C:\\Users\\XXXXX\\AppData\\Local\\Temp\\pip-install-9pfqvjxq\\Twisted\\setup.py'&quot;'&quot;';f=getattr(tokenize, '&quot;'&quot;'open'&quot;'&quot;', open)(__file__);code=f.read().replace('&quot;'&quot;'\r\n'&quot;'&quot;', '&quot;'&quot;'\n'&quot;'&quot;');f.close();exec(compile(code, __file__, '&quot;'&quot;'exec'&quot;'&quot;'))' install --record 'C:\Users\XXXXX\AppData\Local\Temp\pip-record-lls0x5g5\install-record.txt' --single-version-externally-managed --compile&quot; failed with error code 1 in C:\Users\XXXXX\AppData\Local\Temp\pip-install-9pfqvjxq\Twisted\"><pre class="notranslate"><code class="notranslate">    ERROR: Complete output from command 'c:\users\xxxxx\appdata\local\programs\python\python37\python.exe' -u -c 'import setuptools, tokenize;__file__='"'"'C:\\Users\\XXXXX\\AppData\\Local\\Temp\\pip-install-9pfqvjxq\\Twisted\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\XXXXX\AppData\Local\Temp\pip-record-lls0x5g5\install-record.txt' --single-version-externally-managed --compile:
    ERROR: running install
    running build
    running build_py
    creating build
    creating build\lib.win-amd64-3.7
    creating build\lib.win-amd64-3.7\twisted
    copying src\twisted\copyright.py -&gt; build\lib.win-amd64-3.7\twisted
    copying src\twisted\plugin.py -&gt; build\lib.win-amd64-3.7\twisted
    copying src\twisted\_version.py -&gt; build\lib.win-amd64-3.7\twisted
    copying src\twisted\__init__.py -&gt; build\lib.win-amd64-3.7\twisted
    copying src\twisted\__main__.py -&gt; build\lib.win-amd64-3.7\twisted
    creating build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\app.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\internet.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\reactors.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\service.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\strports.py -&gt; build\lib.win-amd64-3.7\twisted\application
    copying src\twisted\application\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\application
    creating build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\avatar.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\checkers.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\endpoints.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\error.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\interfaces.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\ls.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\manhole.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\manhole_ssh.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\manhole_tap.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\mixin.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\recvline.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\stdio.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\tap.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\telnet.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\ttymodes.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\unix.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    copying src\twisted\conch\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\conch
    creating build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\checkers.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\credentials.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\error.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\portal.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\strcred.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\_digest.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    copying src\twisted\cred\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\cred
    creating build\lib.win-amd64-3.7\twisted\enterprise
    copying src\twisted\enterprise\adbapi.py -&gt; build\lib.win-amd64-3.7\twisted\enterprise
    copying src\twisted\enterprise\__init__.py -&gt; build\lib.win-amd64-3.7\twisted\enterprise
    creating build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\abstract.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\address.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\asyncioreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\base.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\cfreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\default.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\defer.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\endpoints.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\epollreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\error.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\fdesc.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\gireactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\glib2reactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\gtk2reactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\gtk3reactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\inotify.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\interfaces.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\kqreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\main.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\pollreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\posixbase.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\process.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\protocol.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\pyuisupport.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\reactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\selectreactor.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\serialport.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\ssl.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\stdio.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\task.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\tcp.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\threads.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\tksupport.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\udp.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\unix.py -&gt; build\lib.win-amd64-3.7\twisted\internet
    copying src\twisted\internet\utils.py -&gt; build\lib.win-amd64-3.7\twisted\internet
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    warning: no previously-included files matching 'README' found under directory 'src\twisted'
    warning: no previously-included files matching 'newsfragments' found under directory 'src\twisted'
    warning: no previously-included files found matching 'src\twisted\topfiles\CREDITS'
    warning: no previously-included files found matching 'src\twisted\topfiles\ChangeLog.Old'
    warning: no previously-included files found matching 'pyproject.toml'
    warning: no previously-included files found matching 'codecov.yml'
    warning: no previously-included files found matching 'appveyor.yml'
    warning: no previously-included files found matching '.circleci'
    warning: no previously-included files matching '*' found under directory '.circleci'
    no previously-included directories found matching 'bin'
    no previously-included directories found matching 'admin'
    no previously-included directories found matching '.travis'
    no previously-included directories found matching '.github'
    warning: no previously-included files found matching 'docs\historic\2003'
    warning: no previously-included files matching '*' found under directory 'docs\historic\2003'
    writing manifest file 'src\Twisted.egg-info\SOURCES.txt'
    copying src\twisted\python\twisted-completion.zsh -&gt; build\lib.win-amd64-3.7\twisted\python
    creating build\lib.win-amd64-3.7\twisted\python\_pydoctortemplates
    copying src\twisted\python\_pydoctortemplates\common.html -&gt; build\lib.win-amd64-3.7\twisted\python\_pydoctortemplates
    copying src\twisted\python\_pydoctortemplates\index.html -&gt; build\lib.win-amd64-3.7\twisted\python\_pydoctortemplates
    copying src\twisted\python\_pydoctortemplates\summary.html -&gt; build\lib.win-amd64-3.7\twisted\python\_pydoctortemplates
    copying src\twisted\test\cert.pem.no_trailing_newline -&gt; build\lib.win-amd64-3.7\twisted\test
    copying src\twisted\test\key.pem.no_trailing_newline -&gt; build\lib.win-amd64-3.7\twisted\test
    copying src\twisted\test\server.pem -&gt; build\lib.win-amd64-3.7\twisted\test
    copying src\twisted\test\test_defer.py.3only -&gt; build\lib.win-amd64-3.7\twisted\test
    copying src\twisted\internet\iocpreactor\notes.txt -&gt; build\lib.win-amd64-3.7\twisted\internet\iocpreactor
    copying src\twisted\internet\test\_awaittests.py.3only -&gt; build\lib.win-amd64-3.7\twisted\internet\test
    copying src\twisted\internet\test\_yieldfromtests.py.3only -&gt; build\lib.win-amd64-3.7\twisted\internet\test
    creating build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\chain.pem -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\not-a-certificate -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\thing1.pem -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\thing2-duplicate.pem -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\internet\test\fake_CAs\thing2.pem -&gt; build\lib.win-amd64-3.7\twisted\internet\test\fake_CAs
    copying src\twisted\mail\test\rfc822.message -&gt; build\lib.win-amd64-3.7\twisted\mail\test
    copying src\twisted\python\test\_deprecatetests.py.3only -&gt; build\lib.win-amd64-3.7\twisted\python\test
    copying src\twisted\words\im\instancemessenger.glade -&gt; build\lib.win-amd64-3.7\twisted\words\im
    copying src\twisted\words\xish\xpathparser.g -&gt; build\lib.win-amd64-3.7\twisted\words\xish
    running build_ext
    building 'twisted.test.raiser' extension
    error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": https://visualstudio.microsoft.com/downloads/
    ----------------------------------------
ERROR: Command "'c:\users\xxxxx\appdata\local\programs\python\python37\python.exe' -u -c 'import setuptools, tokenize;__file__='"'"'C:\\Users\\XXXXX\\AppData\\Local\\Temp\\pip-install-9pfqvjxq\\Twisted\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\XXXXX\AppData\Local\Temp\pip-record-lls0x5g5\install-record.txt' --single-version-externally-managed --compile" failed with error code 1 in C:\Users\XXXXX\AppData\Local\Temp\pip-install-9pfqvjxq\Twisted\
</code></pre></div>
<p dir="auto">My spider:</p>
<div class="highlight highlight-source-python notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="class MySpider(CrawlSpider):
    allowed_domains = {'hostname.com'}"><pre class="notranslate"><span class="pl-k">class</span> <span class="pl-v">MySpider</span>(<span class="pl-v">CrawlSpider</span>):
    <span class="pl-s1">allowed_domains</span> <span class="pl-c1">=</span> {<span class="pl-s">'hostname.com'</span>}</pre></div>
<p dir="auto">and <code class="notranslate">scrapy fetch smth</code> raised:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="Traceback (most recent call last):
  File &quot;/home/nuklea/.virtualenvs/default/bin/scrapy&quot;, line 4, in &lt;module&gt;
    execute()
  File &quot;/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/cmdline.py&quot;, line 131, in execute
    _run_print_help(parser, _run_command, cmd, args, opts)
  File &quot;/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/cmdline.py&quot;, line 76, in _run_print_help
    func(*a, **kw)
  File &quot;/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/cmdline.py&quot;, line 138, in _run_command
    cmd.run(args, opts)
  File &quot;/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/commands/fetch.py&quot;, line 55, in run
    default_spider=BaseSpider('default'))
  File &quot;/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/utils/spider.py&quot;, line 38, in create_spider_for_request
    snames = spidermanager.find_by_request(request)
  File &quot;/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/spidermanager.py&quot;, line 48, in find_by_request
    if cls.handles_request(request)]
  File &quot;/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/spider.py&quot;, line 61, in handles_request
    return url_is_from_spider(request.url, cls)
  File &quot;/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/utils/url.py&quot;, line 28, in url_is_from_spider
    getattr(spider, 'allowed_domains', []))
TypeError: can only concatenate list (not &quot;set&quot;) to list"><pre class="notranslate"><code class="notranslate">Traceback (most recent call last):
  File "/home/nuklea/.virtualenvs/default/bin/scrapy", line 4, in &lt;module&gt;
    execute()
  File "/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/cmdline.py", line 131, in execute
    _run_print_help(parser, _run_command, cmd, args, opts)
  File "/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/cmdline.py", line 76, in _run_print_help
    func(*a, **kw)
  File "/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/cmdline.py", line 138, in _run_command
    cmd.run(args, opts)
  File "/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/commands/fetch.py", line 55, in run
    default_spider=BaseSpider('default'))
  File "/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/utils/spider.py", line 38, in create_spider_for_request
    snames = spidermanager.find_by_request(request)
  File "/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/spidermanager.py", line 48, in find_by_request
    if cls.handles_request(request)]
  File "/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/spider.py", line 61, in handles_request
    return url_is_from_spider(request.url, cls)
  File "/home/nuklea/.virtualenvs/default/lib/python2.7/site-packages/scrapy/utils/url.py", line 28, in url_is_from_spider
    getattr(spider, 'allowed_domains', []))
TypeError: can only concatenate list (not "set") to list
</code></pre></div>