- Python Built-in Functions
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Python list() Function
The list() function in Python is used to create a list object. For example:
a = list() # creates an empty list b = list([1,2, 54, "codes", 54.5]) # creates a list with elements print(a) print(b)
The output produced by above Python program, demonstrating the list() function, is given below:
[] [1, 2, 54, 'codes', 54.5]
The same program can also be created in this way:
a = [] b = [1,2, 54, "codes", 54.5] print(a) print(b)
This program produces the exact output as of previous program's output.
Python list() Function Syntax
The syntax to use list() function is:
listName = list()
Python list() Function Example
Most of the time, the list() function is used to convert any other type of object to a list type. Here is an example of using list() to covert a string type to a list type:
str = "codescracker" print(str) mylist = list(str) print(mylist)
The output produced by above program will exactly be:
codescracker ['c', 'o', 'd', 'e', 's', 'c', 'r', 'a', 'c', 'k', 'e', 'r']
Here is another example of list() that are used to convert the set and dictionary object to a list object:
mytuple = (12, 34, 54, 65) print(list(mytuple)) mydictionary = {"Day": "Friday", "Month": "November", "Year": 2021} print(list(mydictionary))
The output produced by above program is shown below:
[12, 34, 54, 65] ['Day', 'Month', 'Year']
Important - While converting the dictionary object to a list using list() function, then key are initialized as elements of the list.
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