Python List Methods

List Satellite

List Methods

Lists come with a toolbox for mutating, searching, and rearranging data. Keep this reference handy.

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Method table

List methods overview

Method	Description
append(x)	Add item to end
extend(iterable)	Concatenate iterables
insert(i, x)	Insert at index (O(n))
remove(x)	Remove first occurrence
pop([i])	Remove and return element
clear()	Remove all elements
index(x)	Find first index of value
count(x)	Count occurrences
sort()	In-place sort
reverse()	Reverse in place
copy()	Shallow copy

Tips

• Use sorted(items) when you need a new list.
• Combine extend with generator expressions for streaming data.
• Prefer collections.deque for repeated pops from the left.

Next up in your learning path

Nested lists

Manage multi-dimensional lists.

Companion

Copy lists safely

Know when methods mutate in place.

Practice

Sorting techniques

Customize sorting with `key` functions.

Deep dive