Python None Keyword
Learn what None means in Python, how NoneType works, how to check if a value is None, and when to use None for missing values, function returns, and default arguments.
Python next() Function
Learn how Python next() works with iterators, default values, StopIteration, generators, first-item lookup, and first matching item patterns.
Python Create Directory Recursively
Learn how to create directories recursively in Python using pathlib Path.mkdir(parents=True, exist_ok=True) and os.makedirs(), including create-if-not-exists examples and common errors.
Python Multiline Comments
Learn how to write multiline comments in Python using multiple # comments. Understand why triple-quoted strings are not true comments, how docstrings differ from comments, and how to comment multiple lines in VS Code, …
Python Matplotlib pyplot
Learn Python Matplotlib pyplot with simple plot examples. Create line plots, scatter plots, bar charts, and make beautiful plots using labels, colors, markers, legends, grids, styles, and savefig().
Python Custom Exceptions
Learn how to create custom exceptions in Python by subclassing Exception, raise custom exceptions with messages, catch them, add attributes, chain exceptions, and follow best practices.
Python List vs Tuple vs Set vs Dictionary
Compare Python list, tuple, set, and dictionary with examples. Learn the differences in order, mutability, duplicates, indexing, syntax, use cases, and when to use each data type.
Python List extend() Method
Learn Python list extend() method with examples. Add items from another list, tuple, set, string, or dictionary, and understand extend() vs append(), +, and +=.
Python While Loop Examples
Learn Python while loop with simple examples, including syntax, counter loops, user input, break, continue, while else, nested while loops, and multiple conditions.
Python len() Function
Learn Python len() function with simple examples. Get the length of strings, lists, tuples, dictionaries, sets, ranges, and custom objects, and fix common TypeError mistakes.
Python *args and **kwargs
Learn Python *args and **kwargs with simple examples. Understand positional arguments, keyword arguments, how to iterate over kwargs, and how to pass args and kwargs to another function.
Python Join List
Learn how to join a list in Python using str.join(), including lists of strings, numbers, mixed values, separators, newline joins, and common TypeError fixes.
Python One Line If Else
Learn how to write Python if else in one line using the conditional expression syntax. Includes one-line if, if else, if elif else, nested conditions, and common mistakes.
Python isupper() Method
Learn Python isupper() method with examples. Check if a string is uppercase, understand return values for numbers, symbols, spaces, empty strings, and compare isupper() with upper(), islower(), and isalpha().
Get GPS Coordinates in Python
Learn how to get latitude and longitude in Python from an address using geopy, and how to get approximate current location from an IP address.
Python Get Home Directory
Learn how to get the current user's home directory in Python using pathlib Path.home(), os.path.expanduser('~'), and environment variables like HOME and USERPROFILE.
Python Function Examples
Learn Python functions with simple examples, including def syntax, calling a function, parameters, return values, default arguments, keyword arguments, *args, **kwargs, and common mistakes.
Python filter() Function
Learn Python filter() function with simple examples. Filter lists, strings, dictionaries, and objects using normal functions, lambda functions, filter(None), and list comprehension alternatives.
Python for Loop in One Line
Learn how to write a Python for loop in one line using list comprehension, generator expressions, for with if condition, if else expression, and simple inline loop examples.
Python Flatten List
Learn how to flatten a list of lists in Python using list comprehension, itertools.chain.from_iterable, nested loops, recursion for deep nesting, and NumPy, plus when to avoid sum() on large data.
Python for Loop
Learn Python for loop syntax with simple examples using lists, strings, range(), dictionaries, nested loops, break, continue, pass, and for else.
Python YAML to Dictionary
Learn how to read a YAML file into a Python dictionary using PyYAML safe_load(), access nested YAML values, load multiple YAML documents, handle errors, and convert dict back to YAML.
Python Concatenate Lists
Learn how to concatenate, combine, and merge lists in Python using the + operator, extend(), +=, unpacking, itertools.chain(), and list comprehension, with examples and common mistakes.
Python Copy String
Learn how to copy a string in Python, why assignment is usually enough for immutable strings, and when slicing, str(), copy.copy(), or deepcopy() are unnecessary.
Python Password Input with Asterisks
Learn how to take password input in Python and show asterisks while typing using getpass echo_char, pwinput, and stdiomask, with examples and common mistakes.
Cobalt Python Library for Akoma Ntoso XML
Learn how to use the Cobalt Python library to work with Akoma Ntoso XML documents, metadata, FRBR URIs, Act documents, validation, and document parsing.
Python Concatenate Strings: +, f-strings, join, and +=
Learn how to concatenate strings in Python with +, f-strings, str.join, +=, spaces, mixing variables and numbers, performance in loops, mistakes, and a quick reference table.
Python Copy List: Assignment, copy.copy(), and deepcopy()
Learn how to copy or clone a Python list using assignment, shallow copy.copy(), list slicing, list.copy(), and copy.deepcopy(), with examples that show when nested objects are shared or independent.
Python ceil() Function
Learn Python ceil() using math.ceil() with examples for positive and negative numbers, ceiling division, ceil vs floor, integers, floats, and common mistakes.
Python Class Example
Learn Python classes with simple examples to create a class, create objects, use __init__ and self, define attributes and methods, class variables, inheritance, and common mistakes.