给定 Python 的维护版本，pip 是否共享相同版本的包？

Question

It seems that many projects provide only an indication of the minor python version (eg python 3.6 ), whereas requirements.txt may require a specific version of a package (eg torch==0.4 ).

This specific version of a package is not available for any minor python version (eg torch==0.4 can be installed only with python 3.5 ou 3.6).

But what happens with maintenance Python versions? (eg python 3.6.9). Can we assume that torch==0.4 will always be distributed?

Answer 1

Python project distributions (libraries, packages, applications) are meant to be compatible with all maintenance releases of the same minor version of the Python interpreter (in 3.6.9 : 3 stands for the major , 6 for the minor, and 9 for the maintenance or bugfix ). In other words if a library is advertised as compatible with Python 3.6, it means it is compatible with all Python 3.6.* versions (3.6.0, 3.6.1, 3.6.9, etc.). On the other hand there is no guarantee it is compatible with 3.7.* , 3.5.* , or even less so with 2.* or 4.* .