Modules & Virtual Environments

2 topics in 2 parts

Key ideas

Pattern / Feature	Idiomatic Pythonic Approach	Sub-optimal Anti-pattern
Data Processing	Comprehensions & Generators (Memory efficient)	Manual loops with repeated append calls
Resource Handling	Context Managers (with statement)	Manual open() and close() calls
Type Annotations	Type hinting via typing module	Unannotated dynamic parameters
Dictionary Lookups	dict.get(key, default) or defaultdict	Key check followed by indexed access