got a expected string or bytes-like object when running install

[ElricleNecro]

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Arch Linux
• Poetry version: 1.1.7

• [tool.poetry]
  name = "testy"
  version = "0.1.0"
  description = ""
  authors = ["Test user"]
  
  [tool.poetry.dependencies]
  python = ">=3.7,<4.0"
  dgl = [
  	{ git = "https://github.com/dmlc/dgl.git", tag = "v0.7.0", markers = "sys_platform == 'linux'"},
  	{ version="^0.7", markers = "sys_platform == 'darwin'"}
  ]
  
  [build-system]
  requires = ["poetry-core>=1.0.0"]
  build-backend = "poetry.core.masonry.api"

Issue

When using this pyproject.toml, I get the following exception:

  TypeError

  expected string or bytes-like object

  at /usr/lib/python3.9/site-packages/poetry/core/utils/helpers.py:27 in canonicalize_name
       23│ _canonicalize_regex = re.compile(r"[-_]+")
       24│ 
       25│ 
       26│ def canonicalize_name(name):  # type: (str) -> str
    →  27│     return _canonicalize_regex.sub("-", name).lower()
       28│ 
       29│ 
       30│ def module_name(name):  # type: (str) -> str
       31│     return canonicalize_name(name).replace(".", "_").replace("-", "_")

[duncm]

I encountered this issue as well but in a different context. Poetry version: 1.1.11.

In my case, I had an existing empty .dist-info directory (not sure why) but it was still discoverable, so in the following block, distribution.metadata["name"] was None, hence the later type error. I fixed it by deleting the empty directory.

poetry/poetry/repositories/installed_repository.py

Lines 112 to 115 in 10d5559

	for distribution in sorted(
	metadata.distributions(path=[entry]), key=lambda d: str(d._path),
	):
	name = distribution.metadata["name"]

Debug output:

$ poetry lock -vvv
Skipping virtualenv creation, as specified in config file.

  Stack trace:

  11  ~/.poetry/lib/poetry/_vendor/py3.9/clikit/console_application.py:131 in run
       129│             parsed_args = resolved_command.args
       130│
     → 131│             status_code = command.handle(parsed_args, io)
       132│         except KeyboardInterrupt:
       133│             status_code = 1

  10  ~/.poetry/lib/poetry/_vendor/py3.9/clikit/api/command/command.py:120 in handle
       118│     def handle(self, args, io):  # type: (Args, IO) -> int
       119│         try:
     → 120│             status_code = self._do_handle(args, io)
       121│         except KeyboardInterrupt:
       122│             if io.is_debug():

   9  ~/.poetry/lib/poetry/_vendor/py3.9/clikit/api/command/command.py:163 in _do_handle
       161│         if self._dispatcher and self._dispatcher.has_listeners(PRE_HANDLE):
       162│             event = PreHandleEvent(args, io, self)
     → 163│             self._dispatcher.dispatch(PRE_HANDLE, event)
       164│
       165│             if event.is_handled():

   8  ~/.poetry/lib/poetry/_vendor/py3.9/clikit/api/event/event_dispatcher.py:22 in dispatch
        20│
        21│         if listeners:
     →  22│             self._do_dispatch(listeners, event_name, event)
        23│
        24│         return event

   7  ~/.poetry/lib/poetry/_vendor/py3.9/clikit/api/event/event_dispatcher.py:89 in _do_dispatch
        87│                 break
        88│
     →  89│             listener(event, event_name, self)
        90│
        91│     def _sort_listeners(self, event_name):  # type: (str) -> None

   6  ~/.poetry/lib/poetry/console/config/application_config.py:141 in set_installer
       139│
       140│         poetry = command.poetry
     → 141│         installer = Installer(
       142│             event.io,
       143│             command.env,

   5  ~/.poetry/lib/poetry/installation/installer.py:65 in __init__
        63│         self._installer = self._get_installer()
        64│         if installed is None:
     →  65│             installed = self._get_installed()
        66│
        67│         self._installed_repository = installed

   4  ~/.poetry/lib/poetry/installation/installer.py:558 in _get_installed
       556│
       557│     def _get_installed(self):  # type: () -> InstalledRepository
     → 558│         return InstalledRepository.load(self._env)
       559│

   3  ~/.poetry/lib/poetry/repositories/installed_repository.py:118 in load
       116│                 path = Path(str(distribution._path))
       117│                 version = distribution.metadata["version"]
     → 118│                 package = Package(name, version, version)
       119│                 package.description = distribution.metadata.get("summary", "")
       120│

   2  ~/.poetry/lib/poetry/_vendor/py3.9/poetry/core/packages/package.py:67 in __init__
        65│         Creates a new in memory package.
        66│         """
     →  67│         super(Package, self).__init__(
        68│             name,
        69│             source_type=source_type,

   1  ~/.poetry/lib/poetry/_vendor/py3.9/poetry/core/packages/specification.py:19 in __init__
        17│     ):
        18│         self._pretty_name = name
     →  19│         self._name = canonicalize_name(name)
        20│         self._source_type = source_type
        21│         self._source_url = source_url

  TypeError

  expected string or bytes-like object

  at ~/.poetry/lib/poetry/_vendor/py3.9/poetry/core/utils/helpers.py:27 in canonicalize_name
       23│ _canonicalize_regex = re.compile(r"[-_]+")
       24│
       25│
       26│ def canonicalize_name(name):  # type: (str) -> str
    →  27│     return _canonicalize_regex.sub("-", name).lower()
       28│
       29│
       30│ def module_name(name):  # type: (str) -> str
       31│     return canonicalize_name(name).replace(".", "_").replace("-", "_")

[aalok-sathe]

Indeed, the bug seems to be stemming from this line.

it was exactly similar as you described, I too had an empty .egg-info directory causing the issue.

[aalok-sathe]

But yes, I am encountering this bug quite often, and arbitrarily, so it's pretty annoying.
Sometimes poetry works fine, but then suddenly it will start throwing this error out of nowhere.

[abn]

Closing as a duplicate of #3628 as it has more information.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.