Migrate pip packages when upgrading Python

pip-merge.py

# Open both files and read lines
with open("old-packages.txt", "r") as f:
    old_packages = f.readlines()

with open("new-packages.txt", "r") as f:
    new_packages = f.readlines()

# Convert lines to dictionary format for easy lookup and merging
old_dict = {pkg.split('==')[0]: pkg.split('==')[1].strip() for pkg in old_packages}
new_dict = {pkg.split('==')[0]: pkg.split('==')[1].strip() for pkg in new_packages}

# Merge dictionaries. This prioritizes entries in new_dict over old_dict.
merged_dict = {**old_dict, **new_dict}

# Convert back to list format
merged_packages = [f"{pkg}=={version}" for pkg, version in merged_dict.items()]

# Save merged package list
with open("merged-packages.txt", "w") as f:
    for pkg in merged_packages:
        f.write(f"{pkg}\n")

print("Merged package list saved to merged-packages.txt.")