First time wading into coding... well, not actual coding, yet, but trying to build from a GitHub source. This is for macOS 10.12.6 Sierra, and that is the system I'm using to build this. 

I've installed the prerequisites listed: 

* xcode
* python
* wxpython
* twodict
* gettext
* ffmpeg

all the latest versions. 

Following instructions I changed directory to the source code's folder and typed 

```
python setup.py install

```

I got this immediately:

```
    Traceback (most recent call last):
  File "setup.py", line 73, in <module>
    from youtube_dl_gui import (
  File "/Users/davec/Downloads/youtube-dl-gui-master/youtube_dl_gui/__init__.py", line 26
    print error
              ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(error)?

```

So what did I miss? My first build, and I'm falling on my face. lOl

I haven't edited any of the source files; I'm not yet brave enough for that...

Project is here:

[youtube-dl GUI](https://github.com/MrS0m30n3/youtube-dl-gui)

Thanks.