Python Built-in Methods – Python list() Function

Python list() Function

Creates a list from an iterable


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.



Parameter Condition Description
iterable Required A sequence or a collection


list() with no arguments creates an empty list.

L = list()
# 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')
# Prints ['a', 'b', 'c']

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

# sequence into list
L = list(range(0, 4))
# 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})
# Prints ['age', 'name']

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


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