Python

Pip

• Output installed packages

pip freeze > requirements.txt

Conda environment

• Export and usage of environment.yml

conda env export > environment.yml
conda env create -f environment.yml

Namedtuple

• Be extra careful when using set literal.

• The issue is that sets in Python are unordered collections, the field ordering could be inconsistent when set is passed to namedtuple as below

• Try to run few times and you would realize the order could be flipped

from collections import namedtuple
Vector = namedtuple("Vector", {"x", "y"})

vector = Vector(1.0, 2.0)
print(vector.x, vector.y)

• Fix: Use list

Vector = namedtuple("Vector", ["x", "y"])