The newly built python environment reports an error when running:ValueError: check_hostname requires server_hostname

reason

• Every time you use the pip install command to download a plug-in, the latest version is downloaded
• Download the requests plugin, it will automatically install the dependent urllib3 plugin
• Then the version of the dependent plug-in is too high, which leads to this error problem

solve

• When installing requests, directly choose to use the lower version
  • pip install requests==2.20
• Or lower the urllib3 version
  • pip install urllib3==1.25.8

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