Python: Create an iterator from several iterators
Python Itertools: Exercise-1 with Solution
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
Python Code Editor:
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Python: Tips of the Day
Inverts a dictionary with non-unique hashable values:
Example:
def tips_collect_dictionary(obj): inv_obj = {} for key, value in obj.items(): inv_obj.setdefault(value, list()).append(key) return inv_obj ages = { "Owen": 25, "Jhon": 25, "Pepe": 15, } print(tips_collect_dictionary(ages))
Output:
{25: ['Owen', 'Jhon'], 15: ['Pepe']}
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