No metadata except PKG-INFO is available

[buddhhu]

• pip version: 21.0.1
• Python version: 3.9.2
• Operating system: Debian Linux 10 (buster) x86_64

I am facing this issue since yesterday

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3021, in _dep_map
    return self.__dep_map
  File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2815, in __getattr__
    raise AttributeError(attr)
AttributeError: _DistInfoDistribution__dep_map

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3012, in _parsed_pkg_info
    return self._pkg_info
  File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2815, in __getattr__
    raise AttributeError(attr)
AttributeError: _pkg_info

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/pip/_internal/commands/install.py", line 514, in _determine_conflicts
    return check_install_conflicts(to_install)
  File "/usr/local/lib/python3.9/site-packages/pip/_internal/operations/check.py", line 105, in check_install_conflicts
    package_set, _ = create_package_set_from_installed()
  File "/usr/local/lib/python3.9/site-packages/pip/_internal/operations/check.py", line 47, in create_package_set_from_installed
    package_set[name] = PackageDetails(dist.version, dist.requires())
  File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2736, in requires
    dm = self._dep_map
  File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3023, in _dep_map
    self.__dep_map = self._compute_dependencies()
  File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3032, in _compute_dependencies
    for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
  File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3014, in _parsed_pkg_info
    metadata = self.get_metadata(self.PKG_INFO)
  File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py", line 1895, in get_metadata
    raise KeyError("No metadata except PKG-INFO is available")
KeyError: 'No metadata except PKG-INFO is available'
WARNING:root:ERROR - Not a valid string```

I am always up-to date but this error comes when I do `pip show <package>` or install any other.

[uranusjr]

Same sympton as #9129 (but different file). Are you also using Conda in the same environment?

[buddhhu]

No

…

On Sat, Feb 27, 2021, 1:50 AM Tzu-ping Chung ***@***.***> wrote: Same sympton as #9129 <#9129> (but different file). Are you also using Conda in the same environment? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#9664 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ALTGQDWZYIT2WXAQ6YZT5H3TA7673ANCNFSM4YI52EIA> .

[pradyunsg]

Consolidating this into #11361