Python list() Function

Creates a list from an iterable

Usage

The list() function creates a list from an iterable.

The iterable may be a sequence (such as a string, tuple or range) or a collection (such as a dictionary, set or frozen set)

There is another way you can create lists based on existing lists. It is called List comprehension.

Syntax

list(iterable)

Examples

list() with no arguments creates an empty list.

L = list()
print(L)
# Prints []

You can convert any sequence (such as a string, tuple or range) into a list using a list() method.

# string into list
T = list('abc')
print(T)
# Prints ['a', 'b', 'c']

# tuple into list
L = list((1, 2, 3))
print(L)
# Prints [1, 2, 3]

# sequence into list
L = list(range(0, 4))
print(L)
# Prints [0, 1, 2, 3]

You can even convert any collection (such as a dictionary, set or frozen set) into a list.

# dictionary keys into list
L = list({'name': 'Bob', 'age': 25})
print(L)
# Prints ['age', 'name']

# set into list
L = list({1, 2, 3})
print(L)
# Prints [1, 2, 3]