ImportError: cannot import name 'SourceDistribution' from 'pip._internal.distributions.source'

Question

pip3 install is not working and also pip3 is not being able to downgrade to pip19 from pip20.0:

Rayaans-MacBook-Pro:~ rayaangrewal$ pip3 install         


        

Answer 1

under project name go to following file in virtual enviroment. venv\Lib\site-packages\pip_internal\distributions__init__.py comment out the very first line which reads.

from pip._internal.distributions.source import SourceDistribution

then install pip version desired.

Answer 2

curl https://bootstrap.pypa.io/get-pip.py | sudo python3

The above fix fixed the issue for me

Answer 3

Install a new version of pip fixes it:

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

Answer 4

Good answers in @pdh's link to github issues.

When using venv in Python 3.6+ on Ubuntu/LXC with a self-install/self-upgrading pip command during execution, you can use get-pip.py instead:

1. Activate the virtual environment venv: source bin/activate

2. Now, instead of the self-updating pip command (which does not work in pip 0.20.0): bin/pip3 install --upgrade pip

3. You can use:

cd bin
# downloading get-pip.py each time; but you could also remove it from here
# and run this manually only once:
wget https://bootstrap.pypa.io/get-pip.py -O ./get-pip.py
# definitely keep this command:
python3 get-pip.py
cd ..

Result:

Collecting pip
...
Installing collected packages: pip
  Found existing installation: pip 20.0.0
    Uninstalling pip-20.0.0:
      Successfully uninstalled pip-20.0.0
Successfully installed pip-20.0.1

Notes to get-pip.py:

• It will upgrade all existing pip applications in that /bin folder (e.g. pip, pip3, pip3.6)
• It will inherently use the arguments install, --upgrade, --force-reinstall
• It uses the arguments setuptools and wheel by default unless specifically disabled with --no-setuptools or --no-wheel

GET-PIP.PY WARNING

In light of the friendly error message WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip. Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue. To avoid this problem you can invoke Python with '-m pip' instead of running pip directly., one can instead replace point 3. above with:

bin/python3 -m pip install -U pip [setuptools] [wheel] [--no-cache-dir]

Answer 5

This is a bug in pip 20.0; see https://github.com/pypa/pip/issues/7620

It's fixed in pip 20.0.1. Upgrade to 20.0.1+ or downgrade to 19.3.1. Get get-pip.py and run

python get-pip.py

or

python get-pip.py pip==19.3.1