Matplotlib imshow(): Arrays, Colormaps, and Image Display
Display images, heatmaps, masks, and arrays with imshow() while controlling color scale, coordinates, interpolation, and aspect.
Python Blog: Tutorials, Fixes, and Projects
Browse practical Python tutorials, error fixes, library guides, data science examples, and project ideas from Python Pool.
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.
Python sys.exit(): Exit Status, SystemExit, and Cleanup
sys.exit raises SystemExit; the interpreter exits in the main thread unless code catches it, and finally blocks still run.
Python hashlib: SHA-256, File Digests, and Secure Choices
Use Python hashlib for SHA-256 and file checksums, stream large files, compare digests safely, and avoid using fast hashes for passwords.
Python Infinity: math.inf, isinf(), and NaN
Represent and test infinity in Python with math.inf, float(‘inf’), isinf(), isfinite(), and isnan().
Python bitstring: Read and Build Binary Data Safely
Use Python bitstring tools to parse binary fields, control endianness and offsets, convert values explicitly, and validate input before decoding packets.
pyjokes in Python: get_joke(), get_jokes(), and Examples
Use the pyjokes Python package to return one or more programmer jokes, choose supported languages and categories, and build a small command-line demo.
Python Timer: threading.Timer, perf_counter(), and timeit
Compare threading.Timer, time.perf_counter(), and timeit for delayed callbacks, elapsed duration, repeatable benchmarks, and timeouts.
NumPy Mean: axis, dtype, keepdims, where, and NaN
Use np.mean() deliberately by choosing the reduction axis, accumulator precision, output shape, and missing-value policy for your array.