Answers for "save all pip installed packages"

Update all packages using pip on Windows

# Open your command shell and enter the below command. This will upgrade all packages system-wide to the latest or newer version available in the Python Package Index (PyPI)
pip freeze | %{$_.split('==')[0]} | %{pip install --upgrade $_}

#outputs the list of installed packages
pip freeze > requirements.txt

#updates all packages
pip install -r requirements.txt --upgrade

update all pip packages

pip freeze | %{$_.split('==')[0]} | %{pip install --upgrade $_}