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Python – Split in Nested tuples

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  • Last Updated : 03 Jul, 2020

Sometimes, while working with Python tuples, we can have a problem in which we need to perform split of elements in nested tuple, by a certain delimiter. This kind of problem can have application in different data domains. Let’s discuss certain ways in which this task can be performed.

Input : test_list = [(3, (‘Gfg’, ‘best’, 6)), (10, (‘CS’, ‘good’, 9))]
Output : [[3, ‘Gfg’, ‘best’, 6], [10, ‘CS’, ‘good’, 9]]

Input : test_list = [(3, (1, 2, 3, 6))]
Output : [[3, 1, 2, 3, 6]]

Method #1 : Using list comprehension + unpack operator(*)
The combination of above functions can be used to solve this problem. In this, we perform the task of unpacking the elements by delimiter using * operator and list comprehension to iterate and form pairs.




# Python3 code to demonstrate working of 
# Split in Nested tuples
# Using list comprehension + unpack operator
  
# initializing list
test_list = [(3, ('Gfg', 'best')), (10, ('CS', 'good')), (7, ('Gfg', 'better'))]
  
# printing original list
print("The original list is : " + str(test_list))
  
# Split in Nested tuples
# Using list comprehension + unpack operator
res = [[a, *b] for a, b in test_list]
  
# printing result 
print("The splitted elements : " + str(res)) 

Output :

The original list is : [(3, ('Gfg', 'best')), (10, ('CS', 'good')), (7, ('Gfg', 'better'))]
The splitted elements : [[3, 'Gfg', 'best'], [10, 'CS', 'good'], [7, 'Gfg', 'better']]

 

Method #2 : Using map() + list()
The combination of above functions can be used to solve this problem. In this, we perform task of extending logic to each elements using map() and list() is used to pack the strings to different containers.




# Python3 code to demonstrate working of 
# Split in Nested tuples
# map() + list()
  
# initializing list
test_list = [(3, ('Gfg', 'best')), (10, ('CS', 'good')), (7, ('Gfg', 'better'))]
  
# printing original list
print("The original list is : " + str(test_list))
  
# Split in Nested tuples
# map() + list()
res = []
for sub in test_list:
    res.append(list(map(str, (*[sub[0]], *[*sub[1]]))))
  
# printing result 
print("The splitted elements : " + str(res)) 

Output :

The original list is : [(3, ('Gfg', 'best')), (10, ('CS', 'good')), (7, ('Gfg', 'better'))]
The splitted elements : [[3, 'Gfg', 'best'], [10, 'CS', 'good'], [7, 'Gfg', 'better']]

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