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Python – Filter Tuples Product greater than K
  • Last Updated : 11 Oct, 2020

Given a Tuple list, extract all with product greater than K.

Input : test_list = [(4, 5, 7), (1, 2, 3), (8, 4, 2), (2, 3, 4)], K = 50 
Output : [(4, 5, 7), (8, 4, 2)] 
Explanation : 140 and 64 are greater than 50, hence tuples extracted.

Input : test_list = [(4, 5, 7), (1, 2, 3), (8, 4, 2), (2, 3, 4)], K = 100 
Output : [(4, 5, 7)] 
Explanation : 140 is greater than 100, hence tuple extracted. 

Method #1 : Using list comprehension

In this, we extract all the tuples, greater than K product using external function.



Python3




# Python3 code to demonstrate working of
# Filter Tuples Product greater than K
# Using list comprehension
  
# getting product
def prod(box):
    res = 1
    for ele in box:
        res *= ele
    return res
  
  
# initializing list
test_list = [(4, 5, 7), (1, 2, 3), (8, 4, 2), (2, 3, 4)]
  
# printing original list
print("The original list is : " + str(test_list))
  
# initializing K
K = 50
  
res = [sub for sub in test_list if prod(sub) > K]
  
# printing result
print("Tuples with product greater than K : " + str(res))

Output:

The original list is : [(4, 5, 7), (1, 2, 3), (8, 4, 2), (2, 3, 4)]
Tuples with product greater than K : [(4, 5, 7), (8, 4, 2)]

Method #2 : Using filter() + lambda

In this, task of filtering tuples is done using filter() and lambda, product is computed in similar way.

Python3




# Python3 code to demonstrate working of 
# Filter Tuples Product greater than K
# Using filter() + lambda
  
# getting product 
def prod(box):
    res = 1
    for ele in box:
        res *= ele 
    return res 
  
# initializing list
test_list = [(4, 5, 7), (1, 2, 3), (8, 4, 2), (2, 3, 4)]
  
# printing original list
print("The original list is : " + str(test_list))
  
# initializing K 
K = 50 
  
# using filter() to get products greater than K
res = list(filter(lambda sub : prod(sub) > K, test_list))
  
# printing result 
print("Tuples with product greater than K : " + str(res))

Output:

The original list is : [(4, 5, 7), (1, 2, 3), (8, 4, 2), (2, 3, 4)]
Tuples with product greater than K : [(4, 5, 7), (8, 4, 2)]

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