Three software engineering concepts that help Data Scientists or Developer save time, collaborate, and write better code are

• Modularity
• Documentation
• Automated Testing

In Python, we use PEP 8 conventions as Python style guide and we can use pycodestyle's StyleGuide class to check multiple files for PEP 8 compliance.

Normally, we can import functions in submodule in package by

• For package' key functionality, it skip the file' name to directly and easily accessible functions through importing package's name
  • from .utils import plot_counter, sum_counters in __init__.py
  • import my_package in my_script.py
• For less central functionality
  • import my_package.utils in my_script.py

With requirements.txt file, it can help your package be more portable by allowing your users to easily recreate its intended environments.

• pip install -r requirements.txt

In order to make your package installable by pip you need to create a setup.py file.