Unable to install anything using pip after upgrade to 20.0

[HenrikOssipoff]

Environment

• pip version: 20.0
• Python version: 3.6.8
• OS: Ubuntu 14.04.6 (Don't judge)

Description

During our build process, we automatically upgrade to the newest version on pip. After upgrading to 20.0 (using pip install -U pip setuptools), we are unable to install any packages.

Output

Traceback (most recent call last):
  File "/home/svc-web/webshop/env/bin/pip", line 8, in <module>
    sys.exit(main())
  File "/home/svc-web/webshop/env/lib/python3.6/site-packages/pip/_internal/cli/main.py", line 73, in main
    command = create_command(cmd_name, isolated=("--isolated" in cmd_args))
  File "/home/svc-web/webshop/env/lib/python3.6/site-packages/pip/_internal/commands/__init__.py", line 96, in create_command
    module = importlib.import_module(module_path)
  File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/svc-web/webshop/env/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 24, in <module>
    from pip._internal.cli.req_command import RequirementCommand
  File "/home/svc-web/webshop/env/lib/python3.6/site-packages/pip/_internal/cli/req_command.py", line 20, in <module>
    from pip._internal.operations.prepare import RequirementPreparer
  File "/home/svc-web/webshop/env/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 16, in <module>
    from pip._internal.distributions import (
  File "/home/svc-web/webshop/env/lib/python3.6/site-packages/pip/_internal/distributions/__init__.py", line 1, in <module>
    from pip._internal.distributions.source import SourceDistribution
ImportError: cannot import name 'SourceDistribution'

[ntoll]

I see the same thing:

$ pip install requests
Traceback (most recent call last):
  File "/home/ntoll/.virtualenvs/sdclient/bin/pip", line 8, in <module>
    sys.exit(main())
  File "/home/ntoll/.virtualenvs/sdclient/lib/python3.7/site-packages/pip/_internal/cli/main.py", line 73, in main
    command = create_command(cmd_name, isolated=("--isolated" in cmd_args))
  File "/home/ntoll/.virtualenvs/sdclient/lib/python3.7/site-packages/pip/_internal/commands/__init__.py", line 96, in create_command
    module = importlib.import_module(module_path)
  File "/home/ntoll/.virtualenvs/sdclient/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/ntoll/.virtualenvs/sdclient/lib/python3.7/site-packages/pip/_internal/commands/install.py", line 24, in <module>
    from pip._internal.cli.req_command import RequirementCommand
  File "/home/ntoll/.virtualenvs/sdclient/lib/python3.7/site-packages/pip/_internal/cli/req_command.py", line 20, in <module>
    from pip._internal.operations.prepare import RequirementPreparer
  File "/home/ntoll/.virtualenvs/sdclient/lib/python3.7/site-packages/pip/_internal/operations/prepare.py", line 16, in <module>
    from pip._internal.distributions import (
  File "/home/ntoll/.virtualenvs/sdclient/lib/python3.7/site-packages/pip/_internal/distributions/__init__.py", line 1, in <module>
    from pip._internal.distributions.source import SourceDistribution
ImportError: cannot import name 'SourceDistribution' from 'pip._internal.distributions.source' (/home/ntoll/.virtualenvs/sdclient/lib/python3.7/site-packages/pip/_internal/distributions/source/__init__.py)

Python 3.7.2 on Ubuntu 18.04

[honnix]

Same here #7619 (comment)

Seems like unclean dist.

[akaihola]

Exactly the same with Python 3.7.5 on Fedora 29. The same happens both in virtualenvs and with --user. Also, doesn't matter if I run pip3.7 or python3.7 -m pip.

And as @ntoll suggests below, kudos for everyone working to fix this unfortunate glitch! Nice to see only neutral and supportive comments here. Open Source community at its best.

[landfillbaby]

same here, python 3.8.1 on android 9 termux. i assume it's the same for basically everyone

[svms1]

I have the same issue in a docker build, using the python:3.8-busterimage:

Step 1/6 : FROM python:3.8-buster
 ---> 0a3a95c81a2b
Step 2/6 : ADD . /app
 ---> a3be40376bd8
Step 3/6 : WORKDIR /app
 ---> Running in 6f53960d3257
Removing intermediate container 6f53960d3257
 ---> 14b7a3ccf004
Step 4/6 : RUN pip install --upgrade pip setuptools
 ---> Running in 6f9dfc84e0a3
Collecting pip
  Downloading https://files.pythonhosted.org/packages/60/65/16487a7c4e0f95bb3fc89c2e377be331fd496b7a9b08fd3077de7f3ae2cf/pip-20.0-py2.py3-none-any.whl (1.5MB)
Collecting setuptools
  Downloading https://files.pythonhosted.org/packages/a7/c5/6c1acea1b4ea88b86b03280f3fde1efa04fefecd4e7d2af13e602661cde4/setuptools-45.1.0-py3-none-any.whl (583kB)
Installing collected packages: pip, setuptools
  Found existing installation: pip 19.3.1
    Uninstalling pip-19.3.1:
      Successfully uninstalled pip-19.3.1
  Found existing installation: setuptools 41.6.0
    Uninstalling setuptools-41.6.0:
      Successfully uninstalled setuptools-41.6.0
Successfully installed pip-20.0 setuptools-45.1.0
Removing intermediate container 6f9dfc84e0a3
 ---> 4db4dd1c01a1
Step 5/6 : RUN pip install -r requirements.txt
 ---> Running in 01e0b70d0d81
Traceback (most recent call last):
  File "/usr/local/bin/pip", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/cli/main.py", line 73, in main
    command = create_command(cmd_name, isolated=("--isolated" in cmd_args))
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/commands/__init__.py", line 96, in create_command
    module = importlib.import_module(module_path)
  File "/usr/local/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/commands/install.py", line 24, in <module>
    from pip._internal.cli.req_command import RequirementCommand
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/cli/req_command.py", line 20, in <module>
    from pip._internal.operations.prepare import RequirementPreparer
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/operations/prepare.py", line 16, in <module>
    from pip._internal.distributions import (
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/distributions/__init__.py", line 1, in <module>
    from pip._internal.distributions.source import SourceDistribution
ImportError: cannot import name 'SourceDistribution' from 'pip._internal.distributions.source' (/usr/local/lib/python3.8/site-packages/pip/_internal/distributions/source/__init__.py)

[cj-dainius-prakapavicius]

Same here. Python 3.7.4 using Ubuntu 18.04 and Alpine linux on Docker.

[messa]

Same on MacPorts Python on macOS:

$ rm -rf venv && python3.8 -m venv venv && ./venv/bin/python -m pip install -U pip && ./venv/bin/python -m pip install requests
Collecting pip
  Using cached https://files.pythonhosted.org/packages/60/65/16487a7c4e0f95bb3fc89c2e377be331fd496b7a9b08fd3077de7f3ae2cf/pip-20.0-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 19.2.3
    Uninstalling pip-19.2.3:
      Successfully uninstalled pip-19.2.3
Successfully installed pip-20.0
Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/runpy.py", line 193, in _run_module_as_main
    return _run_code(code, main_globals, None,
  ...
  File "/Users/messa/test/venv/lib/python3.8/site-packages/pip/_internal/operations/prepare.py", line 16, in <module>
    from pip._internal.distributions import (
  File "/Users/messa/test/venv/lib/python3.8/site-packages/pip/_internal/distributions/__init__.py", line 1, in <module>
    from pip._internal.distributions.source import SourceDistribution
ImportError: cannot import name 'SourceDistribution' from 'pip._internal.distributions.source' (/Users/messa/test/venv/lib/python3.8/site-packages/pip/_internal/distributions/source/__init__.py)

[mwoss]

Exact same issue. Python 3.7.6, system: Mac OS Catalina

[jamescooke]

Same issue on Python 3.7.3 which is the Ubuntu 19.04 default.

[ntoll]

It's worth mentioning that mistakes, problems and unforeseen mishaps happen to all projects, no matter how much you plan and try to mitigate such events.

Spare a thought and supportive comments for the volunteer Pythonistas looking into this and fixing it for all our benefit.