如何在 Python 中安装“警告”包？

Question

我见过 Python 程序使用

import warnings

如何安装那个包？ 我试过了

pip install --upgrade warnings

并得到一个错误

Collecting warnings
  Could not find a version that satisfies the requirement warnings (from versions: )
No matching distribution found for warnings

Answer 1

warnings是内置的。 不需要安装它。

Answer 2

pip install pytest-warnings

使用此命令进行警告安装