Python locals(): Inspect Local Names and Scope Carefully
Learn what Python locals() returns, how local scope works, why modifying the returned mapping is unreliable, and safer alternatives.
Python Blog: Tutorials, Fixes, and Projects
Browse practical Python tutorials, error fixes, library guides, data science examples, and project ideas from Python Pool.
Save Python Variables to a File: JSON, Pickle, and Text
Save Python variables with JSON, pickle, or text files by matching the format to interoperability, trusted data, types, and long-term storage needs.
Remove Unicode Characters in Python: ASCII, Symbols, and Normalization
Remove or replace selected Unicode characters in Python with encode/decode, regex, translate, and normalization while preserving the text you actually need.
Sort a Dictionary by Value in Python: sorted(), Ties, and Top Values
Sort Python dictionaries by value with sorted(), lambda, itemgetter, reverse order, tie-breakers, and ordered output.
Convert Bytes to String in Python with decode()
Decode Python bytes safely with an explicit encoding, handle invalid data deliberately, and keep text-versus-binary boundaries clear in files and APIs.
Convert Hexadecimal to Decimal in Python with int()
Convert hexadecimal strings to decimal integers in Python with int(base=16), handle 0x prefixes and validation, and format results safely.
Matplotlib Polar Plot in Python: Angles, Labels, and Examples
Create a Matplotlib polar plot in Python with theta values, radial data, labels, limits, grids, and readable styling for circular data.
Python Semicolon: When to Use ; in Code
Learn when Python semicolons separate simple statements, why one statement per line is clearer, and which syntax cannot be compressed safely.
NumPy count_nonzero(): Count Values, Masks, and Axes
Use NumPy count_nonzero() to count true values, threshold matches, and nonzero elements across an array or selected axes.
NumPy c_: Join Arrays as Columns
Use NumPy c_ for compact column-wise array construction, then compare its shape behavior with column_stack, r_, and concatenate.