Learn Python Sort Lists | Python Course

Sorting lists is a common task in Python when you need to organize data in a specific order. Python provides powerful and flexible ways to sort lists in-place or by creating a new sorted list.

Sort a List Using `sort()`

The sort() method sorts the list in ascending order by default and modifies the original list.

Sort in Descending Order

Use the reverse=True argument.

Sort a List Using `sorted()`

The sorted() function returns a new sorted list without changing the original.

Sort by Length Using `key`

The key parameter allows custom sorting logic.

Sort List of Tuples

Sort with Case Sensitivity

By default, uppercase letters come first.

Case-Insensitive Sort

Reverse a List Without Sorting

Sort Numeric vs String Values

Sorting Nested Lists

Common Mistakes

Expecting `sort()` to Return a List

sort() returns None.

Mixing Incompatible Types

Performance Note

sort() is faster for large lists
sorted() is useful when original order must be preserved
Python uses Timsort, which is efficient and stable

Sort a List Using sort()