python

### get notebook tokens

> ipython
[1] : system("jupyter" "notebook" "list")
Out[1]: 
['Currently running servers:','http://localhost:8895/token=067470c5ddsadc54153ghfjd817d15b5d5f5341e56b0dsad78a :: /u/user/dir']

### istall on untrusted server

pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org <package_name>

### special methods

__del__                             invoked by the interpreter when the instance is about to be destroyed, used to release external resources

import weakref
weakref.finalize(obj,func)          object destroy callback registration

### commands

create wheel                        python setup.py sdist bdist_wheel
check dist before upload to pypi    twine check dist/*
upload dist to pypi                 twine upload dist/*


#### conda
create a conda environment          conda create -p ./.env/python38 python=3.8
activate the conda environment      conda activate .env/python38
deactivate the conda environment    (<...>/.env/python38)) $ conda deactivate