'python' is not recognized as an internal or external command [duplicate]

Question

Try "py" instead of "python" from command line:

C:\Users\Cpsa>py
Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:38:22) [MSC v.1600 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

I have found the answer... click on the installer and check the box "Add python to environment variables" DO NOT uninstall the old one rather click on modify....Click on link for picture...

You need to add that folder to your Windows Path:

https://docs.python.org/2/using/windows.html Taken from this question.

Firstly, be sure where your python directory. It is normally in C:\Python27. If yours is different then change it from the below command.

If after you install it python still isn’t recognized, then in PowerShell enter this:

[Environment]::SetEnvironmentVariable("Path", "$env:Path;C:\Python27", "User")

Close PowerShell and then start it again to make sure Python now runs. If it doesn’t, restart may be required.

Type py -v instead of python -v in command prompt

If you want to see python version then you should use py -V instead of python -V

C:\Users\ghasan>py -V

Python 3.7.1

If you want to go to python's running environment then you should use py instead of python

C:\Users\ghasan>py

Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit (AMD64)] on win32

Type "help", "copyright", "credits" or "license" for more information.

Here you can run the python program as:

print('Hello Python')

Hello Python