Learn Python programming from scratch
Learn what Python context managers are, how the with statement uses enter and exit methods, and why context managers guarantee cleanup regardless of exceptions.
Learn how to use the with statement in Python for file handling, lock management, and multiple context managers. Master the as clause and nested contexts.
Learn how to create custom context managers in Python by implementing the enter and exit methods, turning any setup-and-teardown pattern into a reusable with statement.
Learn how the contextlib module simplifies working with context managers in Python, including the contextmanager decorator, suppress, redirect_stdout, and ExitStack.
Learn the most common mistakes with Python decorators and context managers, including missing functools.wraps, mutable defaults, exception suppression, and resource leaks.
Learn what the Python standard library is, why it matters, and how to use its built-in modules without installing anything extra.
Learn how to use the Python math module for square roots, rounding, trigonometry, logarithms, and mathematical constants.
Learn how to use Python's random module to generate random numbers, pick random items, shuffle sequences, and control randomness with seeds.
Learn how to create, compare, and manipulate dates, times, and timedeltas using Python's datetime module.
Learn how to use strftime and strptime to format dates as strings and parse date strings into Python datetime objects.
Learn how to handle time zones in Python using the zoneinfo module, create timezone-aware datetimes, and convert between time zones.
Learn how to use Python's json module to read JSON from files and strings, write Python objects as JSON, and handle common serialization errors.
