Python TypedDict: Required and Optional Keys
Use Python TypedDict to document dictionary keys and value types, model optional fields, and understand what static typing does not validate at runtime.
Tutorials
Browse Python tutorials for beginners and working developers, including syntax, libraries, examples, projects, and real problem-solving guides.
Python Round to Two Decimals: round(), Format, and Decimal
Round Python values to two decimals with round(), f-strings, format(), and Decimal while understanding floating-point ties.
Python int(): Convert Strings, Floats, Bases, and Booleans
Use Python int() to convert strings and numbers, parse bases, handle whitespace, and avoid common conversion errors.
Python PDF Parser: pypdf, pdfplumber, and PyMuPDF
Compare Python PDF parser options for pypdf, pdfplumber, and PyMuPDF, with safe text extraction, scanned PDFs, and fallback choices.
Python Regex Optional Groups: ?, group(), and None
Make Python regex groups optional with ?, read named captures safely, and understand None versus an empty string.
Python functools.reduce: Accumulate Values Clearly and Safely
Use Python functools.reduce with an initializer, readable callables, type-aware accumulation, error handling, and alternatives such as sum or a loop.
Python Expressions: Values, Operators, Calls, and Evaluation
Understand Python expressions, operator precedence, function calls, comprehensions, conditional expressions, assignment expressions, and evaluation order.
Copy Files in Python: shutil.copyfile(), copy(), copy2(), and copytree()
Copy Python files with the right shutil function, destination policy, metadata expectations, symlink behavior, and backup verification.
Keyword Arguments in Python: Names, Defaults, and **kwargs
Use Python keyword arguments for readable calls, keyword-only parameters, defaults, unpacking, and controlled **kwargs without hiding API mistakes.
Split a String in Half in Python: Slicing and Odd Lengths
Split a Python string into two halves with len(), integer division, slicing, and an explicit rule for odd-length and empty strings.