Sort a Dictionary by Key in Python with sorted()
Sort a Python dictionary by key with sorted() and dict(), while making reverse order, case normalization, dates, and nested keys explicit.
Tutorials
Browse Python tutorials for beginners and working developers, including syntax, libraries, examples, projects, and real problem-solving guides.
Python %d Formatting: Integer Placeholders and Modern Alternatives
Use Python %d formatting for integers, width, zero padding, multiple values, and percent signs, then compare it with f-strings.
Python Ternary Operator: Conditional Expressions Clearly
Use Python ternary expressions for compact conditional values, avoid nested unreadable logic, and choose a normal if statement when the branches do more than return a value.
Python Serial Read with pySerial: Bytes, Lines, and Timeouts
Read reliable serial messages with pySerial by defining framing, timeout, buffering, byte decoding, disconnect, and cleanup behavior.
Python HTTP Server: http.server, Ports, Directories, and Safety
Start Python’s local http.server, choose a port and directory, bind safely, write a small handler, and understand why it is not a production web server.
Copy a List in Python: Slicing, copy(), and deepcopy()
Copy Python lists safely with slicing, list(), copy(), and deepcopy(), and understand shallow copies, nested mutability, aliases, and performance.
Append Strings in Python: +, join(), f-Strings, and More
Combine Python strings with +, +=, join(), f-strings, StringIO, and templates while keeping types, separators, and encoding explicit.
Python XOR Operator (^): Booleans, Bits, and Examples
Use Python’s ^ operator deliberately: bitwise XOR compares integer bits, while explicit boolean logic can make truth-value intent clearer.
Black Formatter with Git: Hooks, CI, and Configuration
Use Black with Git, pre-commit, pyproject.toml, GitHub Actions, VS Code, and Jupyter while keeping formatting reproducible.
Python Timezone: zoneinfo, UTC, Conversion, and DST
Handle Python timezones with zoneinfo, aware datetimes, UTC storage, astimezone(), DST transitions, and safe formatting.