如何在Python中安装'warnings'包？

Question

我见过使用

的Python程序

import warnings

如何安装该软件包？我试过了

pip install --upgrade warnings

并收到错误

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

Answer 1

warnings已内置。无需安装。

Answer 2

pip install pytest-warnings

使用此命令进行警告安装