Pipenv始终指向已有虚拟环境及包安装锁定失败求助

问题1：创建虚拟环境时指向已有环境，Pipfile生成在错误目录 #

执行命令及输出 #

[philippbunke@fedora market_maker]$ pipenv --python 3.10
Virtualenv already exists!
Removing existing virtualenv...
Creating a virtualenv for this project...
Pipfile: /home/philippbunke/Programs/repos/work/playground/Pipfile
Using /usr/bin/python3 (3.10.6) to create virtualenv...
⠋ Creating virtual environment...created virtual environment CPython3.10.6.final.0-64 in 558ms
  creator CPython3Posix(dest=/home/philippbunke/.local/share/virtualenvs/playground-QFVQT-z1, clear=False, no_vcs_ignore=False, global=False)
  seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/philippbunke/.local/share/virtualenv)
    added seed packages: pip==21.3.1, setuptools==58.3.0, wheel==0.37.0
  activators BashActivator,CShellActivator,FishActivator,NushellActivator,PowerShellActivator,PythonActivator

✔ Successfully created virtual environment! 
Virtualenv location: /home/philippbunke/.local/share/virtualenvs/playground-QFVQT-z1

原因 #

• Pipenv通过目录名哈希关联虚拟环境，若当前目录与已有环境的哈希冲突，会自动复用旧环境
• 存在残留的PIPENV_PIPFILE环境变量，强制指定了Pipfile路径
• 当前目录的父目录中存在Pipfile，Pipenv会向上查找并复用

解决方法 #

• 清除环境变量：

  unset PIPENV_PIPFILE
  

• 强制创建独立环境：

  pipenv --python 3.10 --clear
  

  --clear参数会彻底清除关联的旧环境，确保生成全新环境
• 手动指定Pipfile路径：

  PIPENV_PIPFILE=$(pwd)/Pipfile pipenv --python 3.10
  

• 删除旧环境目录：直接删除/home/philippbunke/.local/share/virtualenvs/playground-QFVQT-z1后重新执行创建命令

问题2：安装qpsolvers时依赖锁定失败 #

执行命令及报错 #

[philippbunke@fedora market_maker]$ pipenv install qpsolvers
Installing qpsolvers...
Adding qpsolvers to Pipfile's [packages]...
✔ Installation Succeeded 
Pipfile.lock not found, creating...
Locking [dev-packages] dependencies...
Locking [packages] dependencies...
Building requirements...
Resolving dependencies...
✘ Locking Failed! 

CRITICAL:pipenv.patched.notpip._internal.resolution.resolvelib.factory:Could not find a version that satisfies the requirement python>=3.6 (from versions: none)
[ResolutionFailure]:   File "/home/philippbunke/.local/lib/python3.10/site-packages/pipenv/resolver.py", line 743, in _main
[ResolutionFailure]:       resolve_packages(pre, clear, verbose, system, write, requirements_dir, packages, dev)
[ResolutionFailure]:   File "/home/philippbunke/.local/lib/python3.10/site-packages/pipenv/resolver.py", line 704, in resolve_packages
[ResolutionFailure]:       results, resolver = resolve(
[ResolutionFailure]:   File "/home/philippbunke/.local/lib/python3.10/site-packages/pipenv/resolver.py", line 685, in resolve
[ResolutionFailure]:       return resolve_deps(
[ResolutionFailure]:   File "/home/philippbunke/.local/lib/python3.10/site-packages/pipenv/utils.py", line 1370, in resolve_deps
[ResolutionFailure]:       results, hashes, markers_lookup, resolver, skipped = actually_resolve_deps(
[ResolutionFailure]:   File "/home/philippbunke/.local/lib/python3.10/site-packages/pipenv/utils.py", line 1099, in actually_resolve_deps
[ResolutionFailure]:       resolver.resolve()
[ResolutionFailure]:   File "/home/philippbunke/.local/lib/python3.10/site-packages/pipenv/utils.py", line 877, in resolve
[ResolutionFailure]:       raise ResolutionFailure(message=str(e))
[pipenv.exceptions.ResolutionFailure]: Warning: Your dependencies could not be resolved. You likely have a mismatch in your sub-dependencies.
  You can use $ pipenv install --skip-lock to bypass this mechanism, then run $ pipenv graph to inspect the situation.
  Hint: try $ pipenv lock --pre if it is a pre-release dependency.
ERROR: No matching distribution found for python>=3.6

原因 #

• qpsolvers的某个依赖包错误地将python作为PyPI包依赖声明（而非Python版本要求），导致Pipenv尝试下载不存在的python包
• Pipenv解析器版本存在bug，无法正确识别依赖中的Python版本约束
• 本地Python环境的版本信息未被Pipenv正确读取

解决方法 #

• 跳过锁定直接安装：

  pipenv install qpsolvers --skip-lock
  

  安装完成后执行pipenv graph查看依赖树，找到错误声明的包并手动修改Pipfile
• 更新Pipenv到最新版本：

  pip install --upgrade pipenv
  

  新版本解析器通常能修复这类版本约束识别问题
• 指定qpsolvers的兼容版本：选择依赖声明正确的历史版本安装，例如：

  pipenv install qpsolvers==3.2.0
  

• 尝试预发布版本解析：

  pipenv lock --pre
  

内容的提问来源于stack exchange，提问作者PhilippB