使用 python 3.11 从电子邮件模块生成元数据失败

Question

我正在尝试执行命令

pip3/pip install -win_requirements.txt

，我发现

email

模块是问题所在。

错误如下：

pip3 install email
Defaulting to user installation because normal site-packages is not writeable
Collecting email
  Using cached email-4.0.2.tar.gz (1.2 MB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error
  
  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [18 lines of output]
      Traceback (most recent call last):
        File "<string>", line 2, in <module>
        File "<pip-setuptools-caller>", line 14, in <module>
        File "/usr/lib/python3/dist-packages/setuptools/__init__.py", line 15, in <module>
          import setuptools.version
        File "/usr/lib/python3/dist-packages/setuptools/version.py", line 1, in <module>
          from ._importlib import metadata
        File "/usr/lib/python3/dist-packages/setuptools/_importlib.py", line 45, in <module>
          import importlib.metadata as metadata  # noqa: F401
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/usr/lib/python3.11/importlib/metadata/__init__.py", line 17, in <module>
          from . import _adapters, _meta
        File "/usr/lib/python3.11/importlib/metadata/_adapters.py", line 3, in <module>
          import email.message
        File "/tmp/pip-install-lzxy69gd/email_f38b626eeefa44a098244f34710a1052/email/message.py", line 255
          if str(charset) <> charset.get_output_charset():
                          ^^
      SyntaxError: invalid syntax
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

Answer 1

您正在尝试安装包“email”，它是需求文件的一部分（据我所知应该是win_requirements.txt）。

软件包附带一个安装脚本，该脚本有语法错误：

"/tmp/pip-install-lzxy69gd/email_f38b626eeefa44a098244f34710a1052/email/message.py", line 255 if str(charset) <> charset.get_output_charset(): ^^ SyntaxError: invalid syntax [end of output]

他们使用“<>”而不是“!=”；所以维护者需要修复它。您可以做的是，通过附加 安装旧版本的软件包

打开需求文件“win_requirements.txt”（或任何名称）并找到“email”行并将其替换为“email”<4.0.2". Then it should use the latest version before 4.0.2... if thats not working, you can specify any older version. Try e.g. <4.0.0 to install the latest 3.x.x revision.