1. Use venv

install module

python3 pip install virtualenv

Create a virtual environment

python3 - m venv venv_dir   # Create a virtual environment venv_dir, the venv_dir folder will be automatically generated

Activate the virtual environment

cd venv_dir/./ Scripts / activate pip install package

PS: After activating the environment, all operations are performed in the virtual environment, and will not go to the global python environment and other python virtual environments.

Exit the virtual environment

./Scripts/deactivate _ _ _

Delete the virtual environment

rm -rf venv_dir

PS: Delete the virtual environment directory to delete the virtual environment (installed python packages will be deleted)

2. Use anaconda's conda

Create a virtual environment

conda create - n env_name python = version package_names (the python package installed in this environment by default ) # Example conda create -- name django_venv python = 3.8 django

View virtual environment

conda env list # View all virtual environments created by conda

Activate the virtual environment

conda activate env_name # example conda activate django_venv

Exit the virtual environment

conda deactivate   # Execute conda deactivate directly to exit the current virtual environment

Delete the virtual environment

conda remove -n ven_name --all

3. Generate and install requirements.txt

Generate requirements.txt file

pip freeze > requirements.txt _

Install requirements.txt dependencies

pip install -r requirements.txt _