$pyenv versions (python version check)
$pyenv install 3.7.0 (install the version signified in the project)
$pyenv local 3.7.0 (set and fix python version in the project)
$pip install pipenv (if pipenv is not installed yet)
$pipenv --python 3.7.0 (create virtual env with python 3.7.0)
$pipenv shell (go into the virtual env)
$pipenv install some_package (even in the virtual env shell, use pipenv install, not pip install)
#Hier entwickelt
$exit (go out of virtual env)

# If you are the person who makes Pipfiles,,,  in the project root dir, launch python venv. This creates Pipfile and Pipfile.lock.
$pipenv --python 3.6
# If you would like to set up venv from Pipfiles made by another person, create venv and then install packages wirtten in Pipfiles
$pipenv install --deploy
(NOTE: --deploy causes build-fail when package has not been synced)
# Other commands
$pipenv import pandas==3.5  =  $pipenv run pip install pandas==3.5
# Import python package into venv
$pipenv --python
# Import python package (which is not used in src) into venv
$pipenv install --dev flake8
# terminate venv by deleting ve
pip env --rm 
# Go into the venv
$pipenv shell
# Go out of the venv
$exit

$ cd ~/path_to/lambda_data_agg
$ pyenv local 3.6.0
$ virtualenv test
$ source test/bin/activate
$ pip install -r requirements.txt
#Arbeit
$ deactive
$ rm -rf test

# create requirements.txt, at current directory
$ pipreqs .

# install packages listed in requirements.txt
$ pip install -r requirements.txt

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