Useful Python snippets

conda.ps1

# create new empty env
conda create --name myenv

# export currently activated env to environment.yml without prefixes etc
conda env export --from-history | findstr -v "prefix" > environment.yml

# install environment based on such a environment.yml
conda env create -f environment.yml

# or even better, using Mamba
mamba env create -f environment.yml

# list existing environments
conda env list

# delete existing env
conda env remove -n ENV_NAME

#  update an existing Conda environment with a .yml file
mamba env update --file environment.yml --prune

environment.yml

name: generic
channels:
  - conda-forge
dependencies:
  - numpy
  - scipy
  - pandas
  - matplotlib
  - seaborn
  - jupyter
  - regex
  - autopep8
  - openpyxl
  - pyserial
  - tqdm
  - pip
  # - pip:
    # - git+https://github.com/blaze/dask.git#egg=dask[complete]

relative_imports.md

With a folder structure such as:

meta_project
    libs
        __init__.py
        module.py
    notebook_folder
        notebook.jpynb

If you want to import module.py from notebook.jpynb, you can use the following code:

import os
import sys
module_path = os.path.abspath(os.path.join('..'))
if module_path not in sys.path:
    sys.path.append(module_path)

from libs import module