AttributeError: Module Pip has no attribute 'main'

python3 -m pip install --user --upgrade pip==9.0.3

pip issue: rollback

It appears that pip did a refactor and moved main to internal. There is a comprehensive discussion about it here: https://github.com/pypa/pip/issues/5240

A workaround for me was to change

import pip
pip.main(...)

to

from pip._internal import main
main(...)

I recommend reading through the discussion, I'm not sure this is the best approach, but it worked for my purposes.

First run

import pip
pip.__version__

If the result is '10.0.0', then it means that you installed pip successfully
since pip 10.0.0 doesn't support pip.main() any more, you may find this helpful
https://pip.pypa.io/en/latest/user_guide/#using-pip-from-your-program
Use something like import subprocess subprocess.check_call(["python", '-m', 'pip', 'install', 'pkg']) # install pkg subprocess.check_call(["python", '-m', 'pip', 'install',"--upgrade", 'pkg']) # upgrade pkg

Edit: pip 10.0.1 still doesn't support main
You can choose to DOWNGRADE your pip version via following command:
python -m pip install --upgrade pip==9.0.3

This helps me, https://pip.pypa.io/en/stable/installing/

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python get-pip.py

If you are using python3 and not set it default. do this,

python3 get-pip.py

It works for me.

My solution is to check the version number of pip and use the import the correct main function correctly

import pip

if int(pip.__version__.split('.')[0])>9:
    from pip._internal import main
else:
    from pip import main
def install(package):
    main(['install', package])