Python How-To Guides
Practical, runnable how-to guides for common Python tasks.
All Python how-to guides pages
How to Loop With an Index in Python
Loop over a list and get each item's position at the same time using enumerate() — the clean, Pythonic alternative to range(len(...)), including how to start the count at one.
How to Merge Dictionaries in Python
Merge two or more dictionaries with the | operator, dictionary unpacking, or update() — understand how key conflicts resolve and which approach mutates.
How to Reverse a String in Python
Reverse a Python string the idiomatic way with the slice s[::-1], or with reversed() and join() when you want the intent spelled out — and learn why there is no str.reverse() method.
How to Sort a List in Python
Sort a Python list two ways — in place with list.sort(), or into a new list with sorted() — and order by length, case, or a dictionary key with the key= argument.
Practical Python how-to guides: each one takes a single task and shows the clearest correct way to do it, the common mistakes to avoid, and code you can run and adapt.
Pick a task below, or run any solution in the Python online compiler.