I have Python 2.7.12 (64 bit) installed on my Windows machine.
When I installed it, I added pip and the python.exe path.
Now when I try to install Twilio with
pip install twilio
pip is not recognized as an external or internal command
Please include c:\python27\Scripts in SYSTEM PATH
Procedure to add c:\python27\Scripts to system path:
Assumption: hoping your installation drive is C
Once you have added it, please close all command prompts and open a new command prompt and try it
Or in a new command prompt, type below command
C:\Python27\Scripts\pip.exe install twilio
EDIT: If everything fails, try the below way:
Open command prompt, type "python -m pip install twilio" (without quotes).