list() constructor in Python Last Updated : 07 Nov, 2024 Comments Improve Suggest changes Like Article Like Report In Python list() constructor is a built-in function which construct a list object. We can use list constructor to create an empty list or convert an iterable (dictionary, tuple, string etc.) to a list. Python # Example of list constructor a = list() # creates an empty list b = list((1, 2, 3)) # covert tuple into list c = list("GfG") # covert string into list print(a, type(a)) print(b, type(a)) print(c, type(a)) Output[] <class 'list'> [1, 2, 3] <class 'list'> ['G', 'f', 'G'] <class 'list'> Syntax of list()list([iterable])We can pass optional argument to list() as iterable. If no iterable is provided, it returns an empty list. Use of list() constructor As discussed above, we can create an empty list or convert any iterable to list using list() constructor. Let's see some more examples. Python # range() function returns a range object. # list() can convert this object to a list a = list(range(3)) print(a) # Convert a comprehension to list b = list(x * x for x in range(5)) print(b) Output[0, 1, 2] [0, 1, 4, 9, 16] Creating Nested List with list() constructor Python mat = list([list(range(3)) for _ in range(3)]) print(mat) # output: [[0, 1, 2], [0, 1, 2], [0, 1, 2]] Shallow copy of List using list() Python a = [1, 2, 3] a1 = list(a) a1[0] = 5 print(a) # Output: [1, 2, 3] # different case for Nested List b = [[1, 2, 3], [4, 5, 6]] b1 = list(b) # changing b1 will also reflect in b b1[0][0] = 10 print(b) # Output: [[10, 2, 3], [4, 5, 6]] Comment More infoAdvertise with us Next Article list() constructor in Python abhishek1 Follow Improve Article Tags : Python python-list Practice Tags : pythonpython-list Similar Reads Constructors in Python In Python, a constructor is a special method that is called automatically when an object is created from a class. 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