Python Key-Value Pairs: Dictionaries, Items, and Safe Lookups
Work with Python key-value pairs using dictionaries, items, get, updates, unpacking, missing keys, ordering, and clear data contracts.
Tutorials
Browse Python tutorials for beginners and working developers, including syntax, libraries, examples, projects, and real problem-solving guides.
Python csv.DictReader: Headers, Types, Missing Fields, and Safe Files
Read CSV files with Python csv.DictReader, handle headers and missing fields, convert types explicitly, validate rows, and write safe imports.
Python Wrappers and Decorators: functools.wraps and Arguments
Build Python wrappers and decorators with functools.wraps, arguments, timing, logging, options, and preserved function metadata.
Unpack Tuples in Python: Multiple Assignment and *rest
Unpack Python tuples with multiple assignment, starred targets, nested structures, and deliberate length checks instead of fragile positional assumptions.
Python datetime.fromtimestamp(): Convert Unix Time Safely
Use datetime.fromtimestamp() to convert Unix timestamps with explicit time zones, UTC handling, seconds versus milliseconds checks, and clear daylight-saving behavior.
Python callable(): Check Functions, Classes, and __call__ Objects
Use Python callable() to check functions, classes, callbacks, and objects with __call__, while understanding what the check cannot guarantee.
Python urlparse and urlsplit: Parse URLs Safely
Parse URLs in Python with urllib.parse, choose urlsplit or urlparse, read components, build query strings, and avoid unsafe URL joining assumptions.
Python traceback: Read, Format, Log, and Debug Errors
Read Python tracebacks from the failing line upward, format caught exceptions, preserve causes, and log diagnostic context safely.
itertools.combinations in Python: Choose Unique Groups
Use itertools.combinations to generate r-length selections without replacement, understand ordering, counts, memory behavior, and practical examples.
Python Clamp: Limit a Value Between a Minimum and Maximum
Implement a Python clamp function with min and max bounds, validate reversed limits, handle floats, and compare manual code with standard-library options.