JoeJoe1313/key_differences.md

Created September 6, 2025 11:37

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Python's os

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key_differences.md

Feature	`os.environ['VAR']`	`os.getenv('VAR', default)`
Operation Type	Mutable (Read/Write)	Read-Only
Object Type	Dictionary-style mapping object	Function call
Missing Variable	Raises a `KeyError`	Returns `None` or a specified default
Primary Use Case	Accessing or modifying mandatory configuration	Safely reading optional configuration with fallbacks

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