Articles by Deepak Prasad
Python continue Statement
Learn how the Python continue statement works in for loops, while loops, if conditions, and nested loops, with examples, flowchart, break vs continue, and common mistakes.
Python pass Statement
Learn what the pass statement does in Python, when to use it in functions, classes, if blocks, loops, and exception handling, and how pass differs from continue, break, and return.
Python Numbers
Learn Python numeric types including integers, floating-point numbers, and complex numbers. Understand int vs float, type conversion, numeric literals, precision, and when to use each number type.
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 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 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 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 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.
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.
Global Variables in Python: global, local, nonlocal, and modules
Learn Python global vs local variables, when to use the global and nonlocal keywords, reading and writing globals from functions, mutables, modules, common mistakes, and a quick reference table.
Fix Unknown Time Zone Error in Google Calendar API
Fix Google Calendar API unknown time zone errors by using IANA time zone names, RFC3339 date-time strings with offsets, and Python zoneinfo—avoid ambiguous abbreviations like IST or PST.
Python enumerate() Function
Learn Python enumerate() with simple for loop examples. Use enumerate() to get index and value while looping through lists, strings, tuples, dictionaries, and files.
Python Dictionary Explained
Learn Python dictionary with simple examples, including dictionary syntax, creating dictionaries, accessing values, adding and updating items, looping, checking keys, removing items, and common dictionary methods.
Python Enum
Learn Python Enum with simple examples, including enum class syntax, name and value, iteration, auto(), IntEnum, StrEnum, enum methods, multiple attributes, and common mistakes.
Python Break Statement: for, while, Nested Loops, and else
Learn the Python break statement to exit for and while loops early, how break behaves in nested loops, how it interacts with loop else, break vs continue, and common mistakes.
Python Extend Dictionary
Learn how to extend a dictionary in Python using update(), the |= operator, the | merge operator, and dictionary unpacking. Also learn why dict has no extend() method like list.
Python Logging
Learn Python logging with simple examples. Configure logging using basicConfig(), log to console and file, use log levels, create loggers, handlers, formatters, and avoid common mistakes.
Python datetime Module
Learn Python datetime module with examples for date, time, datetime, now(), strftime(), strptime(), ctime(), timestamps, timedelta, and time zones using zoneinfo.
Python dataclass
Learn Python dataclass with simple examples, including @dataclass, default values, field(default_factory), frozen dataclasses, ordering, __post_init__, asdict(), and common mistakes.