Tips

python verions

Is __init__.py not required for packages in Python 3.3+

Python 3.3+ has Implicit Namespace Packages that allow it to create a packages without an __init__.py file.

Allowing implicit namespace packages means that the requirement to provide an __init__.py file can be dropped completely, and affected ... .

The old way with __init__.py files still works as in Python 2.

but when you make pip package via setup.py *you must make __init__.py

PEP 420 -- Implicit Namespace Packages

PEP 420 – Implicit Namespace Packages | peps.python.org

Coding Tips

re-assign parameter array

new_array_that_you_want_assign = [1, 2, 3]
target_arr[:] = new_array_that_you_want_assign