Fundamentals

Learn how Python's with statement safely opens files: automatic close, read/write modes, CSV handling, multiple files, and context manager basics.

Learn Python's math module: sqrt, pow, ceil, floor, trig functions, logarithms, constants like pi and e, and special numeric checks

Learn how Python's time module works: Unix timestamp, time.sleep() for pauses, localtime(), strftime() for date formatting, and measure execution time.

Learn how Python zip() works: combine iterables, loop over multiple lists, handle different lengths, unzip with *, and use zip_longest

Learn Python's collections module: namedtuple, Counter, defaultdict, and deque for better performance and readability than built-in lists and dicts.

Learn how Python yield works to create memory-efficient generators, process large files, build infinite sequences, and use generator pipelines.

Learn how Python's walrus operator (:=) works for assignment expressions inside if, while, and list comprehensions, with practical examples and

Learn how Python's secrets module generates cryptographically secure random numbers, tokens, and passwords using randbelow, token_hex, token_urlsafe, and compare_digest.