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Python | Count the elements in a list until an element is a Tuple

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  • Difficulty Level : Medium
  • Last Updated : 21 Nov, 2018

In this problem, we need to accept a list. The list can have nested tuples. We need to count the elements in a list until a tuple has been encountered.

Examples:

Input : [4, 5, 6, 10, (1, 2, 3), 11, 2, 4]
Output : 4

Input : [4, (5, 6), 10, (1, 2, 3), 11, 2, 4]
Output : 1

In this program we will use the concept of isinstance() to verify whether we are encountering a tuple or not in our path of count. For detailed guide on isinstance() visit isinstance in Python.




# Python program to count the items
# until a list is encountered
def Count(li):
    counter = 0
    for num in li:
        if isinstance(num, tuple):
            break
        counter = counter + 1
    return counter
  
# Driver Code
li = [4, 5, 6, 10, (1, 2, 3), 11, 2, 4]
print(Count(li))

Output:

4

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