List ()() Function in Python

This guide covers list ()() function in python with practical context and easy-to-follow details. Use it to understand the subject and apply the information confidently.

The Syntax of List ()() Function in Python

list([iterable])

Parameter of List Function ()()

The list () list creation function in Python has a unique parameter:

• Iterable : an object can be string, tuple, set, dictionary or iterator iterative object

The Value Returned from the List

• If the parameter is not passed, list () will create an empty list
• If iterable is passed as a parameter, it creates a list of iterable elements

Example 1: Create List from String, Tuple, List

# danh sách tr?ng
print(list())

# chu?i nguyên âm
nguyenamString = 'aeiou'
print(list(nguyenamString))

# tuple nguyên âm
# vi?t b?i TipsMake.com
nguyenamTuple = ('a', 'e', 'i', 'o', 'u')
print(list(nguyenamTuple))

# danh sách nguyên âm
nguyenamList = ['a', 'e', 'i', 'o', 'u']
print(list(nguyenamList))

Run the program, the result is:

[]
['a', 'e', 'i', 'o', 'u']
['a', 'e', 'i', 'o', 'u']
['a', 'e', 'i', 'o', 'u']

Example 2: Create List of Words Set, Dictionary

# set nguyên âm
nguyenamSet = {'a', 'e', 'i', 'o', 'u'}
print(list(nguyenamSet))

# dictionary nguyên âm
nguyenamDictionary = {'a': 1, 'e': 2, 'i': 3, 'o':4, 'u':5}
print(list(nguyenamDictionary))

Running the program results in:

['e', 'o', 'a', 'i', 'u']
['e', 'o', 'u', 'a', 'i']

Example 3: Create List from Iterator Object

class PowTwo:
 def __init__(self, max):
 self.max = max

 def __iter__(self):
 self.num = 0
 return self

 def __next__(self):
 if(self.num >= self.max):
 raise StopIteration
 result = 2 ** self.num
 self.num += 1
 return result

powTwo = PowTwo(5)
powTwoIter = iter(powTwo)

print(list(powTwoIter))

[1, 2, 4, 8, 16] 

See also: Built-in Python functions