This happens when your machine does not have the correct certificate bundle to access the Pypi repository, or you are behind a corporate proxy that just loves to block everything!

An easy way to get around this is to edit (or create) a local pip.conf file under your home directory:

~/.pip/pip.conf

Put the following in:

[global]

index-url = http://mirrors.aliyun.com/pypi/simple/
trusted-host = mirrors.aliyun.com

As you can see, we have changed the download location to a mirror that doesn’t use HTTPS, so there will be no certificate issues.

Do note that this is NOT a general long term option, but rather something you can use to get the job done if you are well and truly stuck!

 

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