How to pip install a package with min and max version range

Question

I m wondering if there s any way to tell pip  specifically in a requirements file  to install a package with both a minimum version  pip install package gt  0 2  and a maximum version which should never be installed  theoretical api  pip install package lt 0 3    I ask because I am using a third party library that s in active development  I d like my pip requirements file to specify that it should always install the most recent minor release of the 0 5 x branch  but I don t want pip to ever try to install any newer major versions  like 0 6 x  since the API is different   This is important because even though the 0 6 x branch is available  the devs are still releasing patches and bugfixes to the 0 5 x branch  so I don t want to use a static package  0 5 9 line in my requirements file   Is there any way to do that

User · Answer

An elegant method would be to use the    compatible release operator according to PEP 440  In your case this would amount to   package  0 5 0   As an example  if the following versions exist  it would choose 0 5 9    0 5 0 0 5 9 0 6 0   For clarification  each pair is equivalent      0 5 0  gt   0 5 0     0 5       0 5  gt   0 5     0

User · Answer

You can do     pip install  package gt  0 2  lt 0 3    And pip will look for the best match  assuming the version is at least 0 2  and less than 0 3   This also applies to pip requirements files   See the full details on version specifiers in PEP 440

User · Answer

you can also use   pip install package  0 5     which is more consistent and easy to read

[python] How to pip install a package with min and max version range?

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