packaging.requirements.InvalidRequirement: Parse error at "':///home'": Expected stringEnd

• I have searched the issue tracker and believe that this is not a duplicate.

Make sure you run commands with -v flag before pasting the output.

Steps to reproduce

pip install pdm pdm init pdm add flask

Actual behavior

step1 and step2 has not any error, then i use pdm to add a packages, that has this errors

Expected behavior

parse error at “‘😕//home’”

Environment Information

os: arch
python system version: 3.8.6 use version: 3.7.8 from pyenv pdm install method: pip install pdm

# Paste the output of `pdm info && pdm info --env` below:
pdm info        
PDM version:        0.11.0                                              
Python Interpreter: /home/ajin/.pyenv/versions/3.7.8/bin/python3 (3.7.8)
Project Root:       /home/ajin/code/fastapi_test

pdm info --env
{
  "implementation_name": "cpython",
  "implementation_version": "3.7.8",
  "os_name": "posix",
  "platform_machine": "x86_64",
  "platform_release": "5.9.8-arch1-1",
  "platform_system": "Linux",
  "platform_version": "#1 SMP PREEMPT Tue, 10 Nov 2020 22:44:11 +0000",
  "python_full_version": "3.7.8",
  "platform_python_implementaiton": "CPython",
  "python_version": "3.7",
  "sys_platform": "linux"
}

[frostming]

Just avoid installing PDM into global Python. I don’t know what tooling you are using though, This should solve the problem

[rmsc]

I’m experiencing this exact problem, but weirdly enough it only happens when version is set to something in pyproject.toml:

# works fine:
version = ""
# produces parse error:
version = "0.0.1"

The actual parse error I suspect comes from this:

$ pip freeze | grep home
pdm @ file:///home/<username>/.cache/yay/python-pdm/src/pdm-1.4.5/dist/pdm-1.4.5-py3-none-any.whl
pdm-pep517 @ file:///home/<username>/.cache/yay/python-pdm-pep517/src/pdm-pep517-0.6.1/dist/pdm_pep517-0.6.1-py3-none-any.whl
python-cfonts @ file:///home/<username>/.cache/yay/python-cfonts/src/python-cfonts-1.4.0/dist/python_cfonts-1.4.0-py2.py3-none-any.whl

These strings are put in direct_url.json files installed by pip install, according to PEP610. I’m not sure if system-wide packages are supposed to have these, though.

As a final note, this is a system-wide install in Archlinux, and I happen to be the AUR package maintainer for these three packages.