Matplotlib figsize: Inches, DPI, Pixels, and Layout
Control Matplotlib figure width and height in inches, convert to pixels with DPI, and protect labels during export.
Python Blog: Tutorials, Fixes, and Projects
Browse practical Python tutorials, error fixes, library guides, data science examples, and project ideas from Python Pool.
Matplotlib Bar Charts: bar(), barh(), Grouped, and Stacked
Create readable Matplotlib bar charts with bar(), barh(), grouped or stacked series, labels, error bars, and export-ready axis choices.
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.
Matplotlib imshow(): Arrays, Colormaps, and Image Display
Display images, heatmaps, masks, and arrays with imshow() while controlling color scale, coordinates, interpolation, and aspect.
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().