list

A language built-in type to support lists. Example of list literal:

x = [1, 2, 3]

Accessing elements is possible using indexing (starts from 0):

e = x[1]   # e == 2

Lists support the + operator to concatenate two lists. Example:

x = [1, 2] + [3, 4]   # x == [1, 2, 3, 4]
x = ["a", "b"]
x += ["c"]            # x == ["a", "b", "c"]

Similar to strings, lists support slice operations:

['a', 'b', 'c', 'd'][1:3]   # ['b', 'c']
['a', 'b', 'c', 'd'][::2]  # ['a', 'c']
['a', 'b', 'c', 'd'][3:0:-1]  # ['d', 'c', 'b']

Lists are mutable, as in Python.

Methods

None list.append(item)

Adds an item to the end of the list.

Parameter	Description
`item`	Item to add at the end.

None list.extend(items)

Adds all items to the end of the list.

Parameter Description

Parameter	Description
`items`	`sequence` Items to add at the end.

items

Items to add at the end.

int list.index(x)

Returns the index in the list of the first item whose value is x. It is an error if there is no such item.

Parameter	Description
`x`	The object to search.

None list.insert(index, item)

Inserts an item at a given position.

Parameter Description

Parameter	Description
`index`	`int` The index of the given position.
`item`	The item.

index

The index of the given position.

item

The item.

unknown list.pop(i=None)

Removes the item at the given position in the list, and returns it. If no index is specified, it removes and returns the last item in the list.

Parameter	Description
`i`	`int` The index of the item.

None list.remove(x)

Removes the first item from the list whose value is x. It is an error if there is no such item.

Parameter	Description
`x`	The object to remove.