Pythonic Idioms & Writing Beautiful Code

Common Anti-Patterns (and Fixes)

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Anti-Pattern 1: Mutable Default Arguments

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IN THIS LESSON

YOU’RE LEARNING TO

↗identify and fix the mutable-default-argument trap

↗replace bare except with specific exception handling

↗use str.join() instead of string concatenation in loops

↗eliminate manual index loops with enumerate/zip

↗replace type(x)==T checks with isinstance()

↗decompose god functions into focused helpers

↗recognise premature optimisation and resist it