Q:

Python program to count all the elements till first tuple

belongs to collection: Python Tuple Programs

mahmoud2506
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2022-05-23
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Example:

tuple = ("python", "includehelp", 43, 54.23)

Counting all the elements till first Tuple

In the program, we are given a nested collection consisting of a tuple. And we need to create a Python program to count all the elements till the first tuple is encountered.

Input:
(4, 6, (1, 2, 3), 7, 9, (5, 2))

Output:
2

For this, we will traverse the collection till the first tuple is encountered. And count the new number of elements till the tuple. This can be done in Python using a combination of different methods.

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mahmoud2506
2022-05-23
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Method 1:

One method to solve the problem is by looping over the collection using enumerate() which also returns the count and breaks the loop when a tuple is encountered checked using isinstance() method. The returned counter value of the enumerate() method is the required value.

# Python program to count all 
# the elements till first tuple

# Initializing and printing tuple 
myTuple = (4, 6, (1, 2, 3), 7, 9, (5, 2))
print("The elements of tuple are " + str(myTuple))

# Counting all elements till first Tuple 
for count, ele in enumerate(myTuple):
	if isinstance(ele, tuple):
		break

print("The count of elements before first tuple is " + str(count))

Output:

The elements of tuple are (4, 6, (1, 2, 3), 7, 9, (5, 2))
The count of elements before first tuple is 2

Method 2:

Another method to solve the problem is by using a combination of takewhile() and sum method. The takewhile() method takes a lambda function to check if the element is not a tuple.

# Python program to count all 
# the elements till first tuple

from itertools import takewhile

# Initializing and printing tuple 
myTuple = (4, 6, (1, 2, 3), 7, 9, (5, 2))
print("The elements of tuple are " + str(myTuple))

# Counting all elements till first Tuple 
count = sum(1 for sub in takewhile(lambda val: not isinstance(val, tuple), myTuple))

print("The count of elements before first tuple is " + str(count))

Output:

The elements of tuple are (4, 6, (1, 2, 3), 7, 9, (5, 2))
The count of elements before first tuple is 2

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