Python script that checks for differences between virtualenv and requirements.txt

check_requirements.py

import subprocess


def make_reqs_dict(req_list):
    reqs = {}
    for req in req_list:
        if req != "" and "git+" not in req:
            req_name, req_version = req.split("==")
            reqs[req_name] = req_version
    return reqs


# Get list of packages installed in virtualenv
result = subprocess.run(["pip", "freeze"], stdout=subprocess.PIPE)
freeze = result.stdout.decode("utf-8")
env_reqs_list = freeze.split("\n")

# Make a dictionary of packages and versions
env_reqs = make_reqs_dict(env_reqs_list)

# Read the requirements.txt file
file_reqs_list = []
with open("requirements.txt") as f:
    for line in f:
        file_reqs_list.append(line.strip())

# Make a dictionary of packages and versions
file_reqs = make_reqs_dict(file_reqs_list)

# Compare the two dictionaries and print out any differences
for req in file_reqs:
    if req not in env_reqs:
        print("{} is not installed in the virtualenv".format(req))
    elif file_reqs[req] != env_reqs[req]:
        print(
            "{} version mismatch: {} in virtualenv, {} in requirements.txt".format(
                req, env_reqs[req], file_reqs[req]
            )
        )