Python: Create an iterator from several iterators

Last update on March 29 2025 13:02:33 (UTC/GMT +8 hours)

1. Iterator from Iterables

Write a Python program to create an iterator from several iterables in a sequence and display the type and elements of the new iterator.

Sample Solution:

Python Code:

from itertools import chain
def chain_func(l1,l2,l3):
    return chain(l1,l2,l3)    
#List
result = chain_func([1,2,3], ['a','b','c','d'], [4,5,6,7,8,9])
print("Type of the new iterator:")
print(type(result))
print("Elements of the new iterator:")
for i in result:
    print(i)

#Tuple
result = chain_func((10,20,30,40), ('A','B','C','D'), (40,50,60,70,80,90))
print("Type of the new iterator:")
print(type(result))
print("Elements of the new iterator:")
for i in result:
    print(i)

Sample Output:

Type of the new iterator:
<class 'itertools.chain'>
Elements of the new iterator:
1
2
3
a
b
c
d
4
5
6
7
8
9
Type of the new iterator:
<class 'itertools.chain'>
Elements of the new iterator:
10
20
30
40
A
B
C
D
40
50
60
70
80
90

For more Practice: Solve these Related Problems:

• Write a Python program to create an iterator that chains together multiple iterables of different types and then filters out all non-integer elements.
• Write a Python program to build an iterator from nested iterables, flattening them into a single sequence using itertools.chain.
• Write a Python program to create an iterator from several iterables that skips empty sub-iterables and prints the type of each element.
• Write a Python program to generate an iterator from multiple iterables, convert it to a list, and verify that all elements are unique by comparing with a set.

Python Code Editor:

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