How to let pip install package suitable for python27

Question

There is some package which is only supported on python27.Then I run pip install -r requirement.txt where in the requirement file it contains some_package>=xx ,in such requirement, pip will install latest package which may not support python27.So how to address this problem?

I am working on WSL ubuntu 18.04, pip is from python27

Answer 1

Find a version number that supports python 2.7 and change the line some_package>=xx to some_package==xx , where xx is the version number that supports 2.7.

== will pin the package to that specific version.