Programming Tutorials and Coding Guides - Page 8

Learn Python Enum with simple examples, including enum class syntax, name and value, iteration, auto(), IntEnum, StrEnum, enum methods, multiple attributes, and common mistakes.

Learn how to delete a variable in Python using del, what happens after deleting a variable, how to clear variables, unset names, and whether del frees memory immediately.

Learn the Python break statement to exit for and while loops early, how break behaves in nested loops, how it interacts with loop else, break vs continue, and common mistakes.

Learn how to get file size in Python with os.path.getsize, pathlib Path.stat, and os.stat, convert bytes to KB or MB, guard large or empty files, handle errors, and sum folder sizes.

Learn how to extend a dictionary in Python using update(), the |= operator, the | merge operator, and dictionary unpacking. Also learn why dict has no extend() method like list.

Learn Python logging with simple examples. Configure logging using basicConfig(), log to console and file, use log levels, create loggers, handlers, formatters, and avoid common mistakes.

Learn Python datetime module with examples for date, time, datetime, now(), strftime(), strptime(), ctime(), timestamps, timedelta, and time zones using zoneinfo.

Learn Python dataclass with simple examples, including @dataclass, default values, field(default_factory), frozen dataclasses, ordering, __post_init__, asdict(), and common mistakes.

Learn Python Counter from the collections module with examples to count items, words, characters, add elements, update counts, use most_common(), elements(), subtract(), and Counter arithmetic.

Learn Python string casefold() with syntax, examples, Unicode case-insensitive comparison, casefold vs lower, and common mistakes when comparing strings.

Learn the Python if, if else, and if elif else statements: syntax, indentation, elif vs else-if, conditions, flow, nested branches, ternary expressions, loop/try else, and common mistakes.

Learn Python classmethod with examples using @classmethod, cls, class variables, factory methods, return cls, and the difference between class methods, instance methods, and static methods.

Learn how to check if a file exists in Python using pathlib Path.exists(), Path.is_file(), os.path.exists(), and os.path.isfile(), with examples for directories, symlinks, and file errors.

Learn how to return multiple values from a Python function using comma-separated return values, tuple unpacking, lists, dictionaries, NamedTuple, dataclass, and common mistakes.

Learn Python argparse with practical examples for positional arguments, optional flags, default values, type conversion, choices, nargs, boolean flags, and subcommands.

Learn how to call a function from another Python file using import, from import, package imports from a different directory, importlib, and fixes for ModuleNotFoundError.

Learn Python multithreading with practical examples using threading.Thread, start(), join(), daemon threads, Lock, Queue, ThreadPoolExecutor, and best practices for I/O-bound tasks.

Learn how to catch multiple exceptions in Python using one except block with a tuple, separate except blocks, as e, else, finally, and best practices for handling multiple errors.

Learn Python list comprehension: syntax, filters, if-else, range and strings, nested and multiple for loops, flattening lists of lists, map and filter alternatives, pitfalls, and a quick reference table.

Learn Python multiprocessing with practical examples using Process, Pool, pool.map(), Queue, join(), CPU-bound tasks, shared data, and common multiprocessing mistakes.

Learn channels in Go, including send and receive syntax, buffered and unbuffered channels, close, range, select, deadlocks, and common concurrency patterns.

Learn how to run external commands in Go using os/exec, capture stdout and stderr, pass arguments, use shell commands, set timeouts, and avoid command injection.

Learn Python map() function with examples using custom functions, lambda, built-in functions, multiple iterables, string conversion, list conversion, and map vs list comprehension.

Learn how to loop through two or more lists in Python using zip(), enumerate(), range(), indexes, nested loops, and zip_longest() for lists with different lengths.

Learn how to loop N times in Python using for range(), repeat code 5 or 10 times, loop without an index, use while loops, and avoid common off-by-one mistakes.

Learn how Python list pop() removes and returns items by index, defaults to the last item, handles pop(0), raises IndexError, and compares with remove(), del, and clear().

Learn how to get a file extension in Python using pathlib (suffix, suffixes), os.path.splitext, case-insensitive checks, multi-part names like .tar.gz, and common pitfalls.

Install Python packages from GitHub using pip: PEP 508 git URLs, branches, tags, commits, editable installs, requirements.txt, private repos over HTTPS or SSH, subdirectory packages, verification, upgrades, and common …

Learn Python lists with simple examples to create a list, access items, change values, add and remove elements, loop through lists, sort, copy, and use common list methods.

Learn how Python line continuation works using parentheses, brackets, braces, and backslash, with examples for long expressions, strings, lists, function calls, and common errors.