The When of Python Blog

Guidance on when to use Python features (and when not to).
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Grant Paton-Simpson Articles


The Walrus and the (Software) Carpenter

The Walrus operator risks encouraging buggy code by conflating assignment with evaluation. PHP stands as a warning as to where this can lead. There are few cases where the convenience of the Walrus operator outweigh its risks and even these are not clear-cut. From a When of Python view, the Walrus operator should be in Deprecated Python, or possibly Situational Python but with very few situations accepted. The Walrus will only very occasionally belong in production code.


Pickle in a Pickle

Python pickle is something many of us have had a love-hate relationship with. We've loved it before using it and hated it afterwards ;-) Maybe we should put pickle in the Deprecate Python category?

The Who of Python

Python is used by very different groups of people and how we decide which features are Common Python and which are Situational Python must take that into account. If something is common to one group only e.g. data scientists, or enterpise web application developers, it should be considered Situational Python - even if the use case is very common for that group.


Welcome to the When of Python

The When of Python is a fledgling community initiative. The goal is to effectively shrink Python so it fits our brains by providing guidance on when we should use particular language features (and when we should not).