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Python | Search in Nth column in list of tuples

  • Last Updated : 27 Sep, 2019
Geek Week

Sometimes, while working with Python list, we can have a data set that consists of tuples and we have a problem in which we need to search the element in Nth column of list. This has it’s applications in web development domain. Let’s discuss certain ways in which this task can be performed.

Method : Using enumerate() + list comprehension
In this technique we use the power of enumerate() to access index and value in single iteration and then with the help of list comprehension we frame a conditional statement in which we check for the valid value in given column.

# Python3 code to demonstrate working of
# Search in Nth column in list of tuples
# Using enumerate() + list comprehension
# initializing list 
test_list = [('gfg', 1, 9), ('is', 5, 10), (8, 'best', 13)]
# printing list 
print("The original list : " + str(test_list))
# initializing Nth column
N = 2
# initializing num 
ele = 10
# Search in Nth column in list of tuples
# Using enumerate() + list comprehension
res = [idx for idx, val in enumerate(test_list) if val[N] == ele]
# Printing result
print("Row of desired element is : " + str(res))
Output :
The original list : [('gfg', 1, 9), ('is', 5, 10), (8, 'best', 13)]
Row of desired element is : [1]

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