Zip ()() Function in Python

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

Syntax of Zip ()() Function in Python

zip(*iterable)

(Iterable is an object after using methods that will return an iterator, such as String, List, and Tuple).

Parameters of Zip ()() Function

Zip () function in Python has parameters:

• Iterable: Built-in iterable (such as list, string, dict) or iterable declared by the user (made up of the __iter__ method)

Value Returned from Zip ()()

The zip () function returns an iterator of the tuple data sets based on the iterable object.

• If no parameters are passed, zip () returns an empty iterator.
• If the passed parameter has only one iterable, zip () returns tuple with one element.
• If the passed parameter is multiple iterable and the iterable length is not equal, zip will create tuples of length equal to the smallest iterable number.

How to Use Zip ()()

Example 1: How Zip ()() Works in Python

numberList = [1, 2, 3]
strList = ['one', 'two', 'three']

# Không truy?n iterable
result = zip()

# Chuy?n ??i iterator thành list
resultList = list(result)
print(resultList)

# Truy?n 2 iterator
result = zip(numberList, strList)

# Chuy?n ??i iterator thành set
resultSet = set(result)
print(resultSet)

Run the program, the result is:

[]
{(2, 'two'), (3, 'three'), (1, 'one')}

Example 2: the Iterator Has Different Number of Elements

numbersList = [1, 2, 3]
strList = ['one', 'two']
numbersTuple = ('ONE', 'TWO', 'THREE', 'FOUR')

result = zip(numbersList, numbersTuple)

# Chuy?n ??i thành set
resultSet = set(result)
print(resultSet)

result = zip(numbersList, strList, numbersTuple)

# Chuy?n ??i thành set
resultSet = set(result)
print(resultSet)

{(2, 'TWO'), (3, 'THREE'), (1, 'ONE')}
{(2, 'two', 'TWO'), (1, 'one', 'ONE')}

The * operator can be used together with zip () to extract the list.

Example 3: Extract the Value Using Zip ()()

coordinate = ['x', 'y', 'z']
value = [3, 4, 5, 0, 9]

result = zip(coordinate, value)
resultList = list(result)
print(resultList)

c, v = zip(*resultList)
print('c =', c)
print('v =', v)

Run the program, the result is:

[('x', 3), ('y', 4), ('z', 5)]
c = ('x', 'y', 'z')
v = (3, 4, 5)

See also: Built-in Python functions