Skip to content
Related Articles
Python | Count the elements till first tuple
• Last Updated : 21 Nov, 2019

Sometimes, while working with records, we can have a problem in which an element of a record is another tuple records and we might have to count the element count that occur before the record. This is a problem which does not occur commonly, but having a solution to it is useful. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using loop + `isintance() + enumerate()`
This problem can be solved using the above functionalities. In this, we just loop through the elements using `enumerate()` to get the index count of it and check the type using `isinstance()`.

 `# Python3 code to demonstrate working of``# Elements till first tuple``# using isinstance() + enumerate() + loop`` ` `# initialize tuple``test_tup ``=` `(``1``, ``5``, ``7``, (``4``, ``6``), ``10``)`` ` `# printing original tuple``print``(``"The original tuple : "` `+` `str``(test_tup))`` ` `# Elements till first tuple``# using isinstance() + enumerate() + loop``for` `count, ele ``in` `enumerate``(test_tup):``    ``if` `isinstance``(ele, ``tuple``):``        ``break`` ` `# printing result``print``(``"Elements till the first tuple : "` `+` `str``(count))`
Output :
```The original tuple : (1, 5, 7, (4, 6), 10)
Elements till the first tuple : 3
```

Method #2 : Using `takewhile() + sum() + isinstance()` + lambda
The combination of above functions can also be used to solve this problem. In this, we use `takewhile()`, to iterate till a tuple and `sum()` to check the counter.

 `# Python3 code to demonstrate working of``# Elements till first tuple``# using takewhile() + sum() + isinstance() + lambda``from` `itertools ``import` `takewhile`` ` `# initialize tuple``test_tup ``=` `(``1``, ``5``, ``7``, (``4``, ``6``), ``10``)`` ` `# printing original tuple``print``(``"The original tuple : "` `+` `str``(test_tup))`` ` `# Elements till first tuple``# using takewhile() + sum() + isinstance() + lambda``res ``=` `sum``(``1` `for` `sub ``in` `takewhile(``lambda` `ele: ``not` `isinstance``(ele, ``tuple``), test_tup))`` ` `# printing result``print``(``"Elements till the first tuple : "` `+` `str``(res))`
Output :
```The original tuple : (1, 5, 7, (4, 6), 10)
Elements till the first tuple : 3
```

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes arrow_drop_up