Pipenv and Pipfile: The officially recommended Python packaging tool

You no longer need to use pip and virtualenv separately. Use pipenv instead.

ref:
https://github.com/pypa/pipenv
https://pipenv.kennethreitz.org/en/latest/

Install

$ pip install pipenv

ref:
https://pipenv.kennethreitz.org/en/latest/install/#installing-pipenv

Usage

$ pyenv global 3.7.4

# initialize project virtualenv with a specific Python version
# automatically generate both Pipfile and Pipfile.lock from requirements.txt if it exists
$ pipenv --three

$ cd /path/to/project-contains-Pipfile
$ pipenv install

$ pipenv install pangu
$ pipenv install -r requirements.txt

# install packages to dev-packages
$ pipenv install --dev 
autopep8 
flake8 
flake8-bandit 
flake8-blind-except 
flake8-bugbear 
flake8-builtins 
flake8-comprehensions 
flake8-debugger 
flake8-mutable 
flake8-pep3101 
flake8-print 
flake8-string-format 
ipdb 
jedi 
mypy 
pep8-naming 
ptvsd 
pylint 
pylint-celery 
pylint-common 
pylint-flask 
pytest 
watchdog

# switch your shell environment to project virtualenv
$ pipenv shell
$ exit

# uninstall everything
$ pipenv uninstall --all

# remove project virtualenv
$ pipenv --rm

ref:
https://pipenv.kennethreitz.org/en/latest/install/

Example Pipfile

[[source]]
url = "https://pypi.python.org/simple" 
verify_ssl = true 
name = "pypi" 

[requires] 
python_version = "3.7"

[packages] 
celery = "==4.2.1"
flask = "==1.0.2"
requests = ">=2.0.0" 

[dev-packages] 
flake8 = "*" 
ipdb = "*" 
pylint = "*" 

[scripts]
web = "python -m flask run -h 0.0.0.0"
worker = "celery -A app:celery worker --pid= -l info -E --purge"
scheduler = "celery -A app:celery beat -l info --pid="
shell = "flask shell"

ref:
https://pipenv.kennethreitz.org/en/latest/basics/#example-pipfile-pipfile-lock