Question: I installed pip using 
 `$ python get-pip.py`

and I set PATH 

```
  C:\Program Files\Python\Scripts

```

then I restarted the command prompt so that path would take effect. Then I run
 `$ pip`

I get this

```
Traceback (most recent call last):
  File "D:\obj\Windows- 
Release\37amd64_Release\msi_python\zip_amd64\runpy.py", line 193, in 
_run_module_as_main
  File "D:\obj\Windows- 
Release\37amd64_Release\msi_python\zip_amd64\runpy.py", line 85, in 
_run_code
  File "C:\Program Files\Python\Scripts\pip.exe\__main__.py", line 5, in 
<module>
ModuleNotFoundError: No module named 'pip '

```

Answer: 
I solved it. The Problem was I was using python binary and I set path myself, it caused some unreachable files. Now I reinstalled python with the installer. Now everything working fine. Everyone thanks for your help.
Did you try: `$ pip -V`? Or `$ pip help`? Just guessing, but trying checking the version since pip probably requires an argument.