3.4 KiB
3.4 KiB
| title | updated | created |
|---|---|---|
| Pipenv_Pyenv | 2021-05-04 14:58:11Z | 2021-05-04 14:58:11Z |
Pyenv & Pipenv
Installing Pyenv
git clone https://github.com/pyenv/pyenv.git ~/.pyenv
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
pyenv versions # list installed python versions
pyenv install --list # list all available versions for installation
pyenv install <python_version> # install a version
pyenv uninstall <python_version>
pyenv global <python_version> # set version globally
pyenv local <python_version> # set the file .python-version with version 3.8.2
pyenv shell <python_version> # set PYENV_VERSION environment variable as current
pyenv virtualenv <python_version> <environment_name> # create environment
pyenv local <environment_name> # activate enviroment
pyenv activate <environment_name> # the same as above
pyenv deactivate
Using pipenv
Install
pip install --user --upgrade pipenv
Usage
cd project_directory
pipenv --python <python_version> install ## install python in this dir
Pipfile
This is where we will keep of application requirements rather than using requirements.txt
pipenv install fastapi uvicorn
Install some packages and the Pipfile is created with the packages added to Pipfile. By default, Pipenv will always install the newest versions of packages.
[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true
[dev-packages]
[packages]
fastapi = "*"
uvicorn = "*"
[requires]
python_version = "3.7"
Other file created is Pipfile.lock and is super important because it does two things:
- Provides good security by keeping a hash of each package installed.
- Pins the versions of all dependencies and sub-dependencies, giving you replicable environments.
To install development packages just pass the --dev argument. Like
pipenv install --dev ptpython
pipenv update ## update the packages
By default, pipenv install will ONLY install the base packages that should live on production. This is what we want. Passing the --dev parameter will allow us to install base AND dev packages locally or during the CI process.
pipenv shell # Launching subshell in virtual environment…
pip list # lists all install packages and version
pipenv check # check for vulnerabilities (Checking PEP 508 requirements)
cheatsheet
pipenv shell # Activate
python --version # Check version of Python
python # Check path
>>> import sys
>>> sys.executable
quit()
pipenv install camelcase # Install a package
pipenv --rm # remove the virtual environment
pipenv lock -r # Check local packages
pipenv lock -r > requirements.txt
pipenv uninstall <package-name> # Uninstall a package
pipenv install nose --dev # Install a dev package
pipenv install -r ./requirements.txt # Install from requirements.txt
pipenv check # Check security vulnerabilities
pipenv graph # Check dependency graph
pipenv install --ignore-pipfile # Ignore pipfile
pipenv lock # Set lockfile - before deployment
pipenv run python script.py
exit Exiting the virtualenv