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`pip install ansible[azure]` results in `zsh: no matches found: ansible[azure]` at least in my computer (zsh on Ubuntu). I don't know if it is the case with all shells, but at least for me it is. Since square brackets `[]` are special characters in bash, I propose adding single quotes to make sure that package name is always interpreted as literal. The same error is also resolvable by setting noglob.
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