错误：找不到Requirement.parse的合适发行版（＆＃39; pytest-runner＆＃39;）

Question

我试图通过pip安装MechanicalSoup包但我遇到了这些错误：

    Download error on https://pypi.org/simple/pytest-runner/: [SSL: 
        TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version 
        (_ssl.c:645) -- 
    Some packages may not be found!
    Couldn't find index page for 'pytest-runner' (maybe misspelled?)
    No local packages or working download links found for pytest-runner

我尝试了几种方法，但他们无法帮助我。

Answer 1

首先按如下所示安装pytest-runner，然后重试：

pip3 install pytest-runner

或

python3 -m pip install pytest-runner

如果权限被拒绝，您可能要添加--user标记。