Swap Variables in Python: Tuple Assignment and Safe Patterns
Swap Python variables with tuple assignment, temporary names, list and dictionary updates, and clear guidance for mutable objects.
Tutorials
Browse Python tutorials for beginners and working developers, including syntax, libraries, examples, projects, and real problem-solving guides.
Python Scientific Notation: e Notation, Formatting, and Conversion
Write and format Python scientific notation with e or E, while keeping display precision separate from the underlying numeric type.
Check if a String Is an Integer in Python: int() vs isdigit()
Validate integer text with int() and ValueError, or choose digit methods and regex when the input policy is narrower.
Python Max Int: int Precision vs sys.maxsize
Python integers grow to the available memory limit; learn why sys.maxsize is not the maximum int and how to inspect bit length.
How to Iterate Through a List in Python
Iterate through Python lists with direct for loops, enumerate(), index ranges, while loops, and list comprehensions.
Python Priority Queue: heapq vs queue.PriorityQueue
Implement Python priority queues with heapq for lightweight control or queue.PriorityQueue for synchronized producer-consumer workflows.
Python Alphabet: ASCII Letters, chr(), ord(), and Unicode
Generate lowercase and uppercase Python alphabets with string constants or chr and ord, then choose the right ASCII or Unicode validation rule.
Python help() Function: How It Works
Use Python help() to inspect functions, modules, keywords, classes, and packages from the interpreter or with direct object arguments.
Binary Search in Python: bisect, Invariants, and Duplicates
Implement binary search in Python with bisect or explicit bounds, preserve sorted-input invariants, and handle missing values and duplicate matches correctly.
Python Sort List of Lists: key, itemgetter, and Multiple Keys
Sort a Python list of lists by an index, length, sum, or multiple keys with sorted(), list.sort(), and operator.itemgetter while preserving clear mutation semantics.