No matching distribution found for subprocess

[wiseman-timelord]

D:\IGA\iga>pip install -r requirements.txt
ERROR: Could not find a version that satisfies the requirement subprocess (from versions: none)
ERROR: No matching distribution found for subprocess

[dennishansen]

subprocess is a built-in Python module and doesn't need to be installed separately for python 2.7+

You can try to resolve the issue by check upgrading the pip version using the command pip install --upgrade pip and then running pip install -r requirements.txt again.