should i delete old pip packages code example

Example 1: delete all pip packages

#Write all modules to a txt file
pip freeze > requirements.txt

#Now to remove one by one:
pip uninstall -r requirements.txt

#If we want to remove all at once then:
pip uninstall -r requirements.txt -y

Example 2: pip uninstalled itself

#the best way to install pip if uninstalled is using the following command

python -m ensurepip

# not only it will check whether there is pip installed , it will install 
# for you if not found