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Python | Rear elements from Tuple Strings

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  • Last Updated : 30 Jan, 2020

Yet another peculiar problem which might not be common, but can occur in python programming while playing with tuples. Since tuples are immutable, they are difficult to manipulate and hence knowledge of possible variation solutions always helps. This articles solves problem of extracting only the rear index element of each string in tuple. Let’s discuss certain ways in which this problem can be solved.

Method #1 : Using list comprehension
Almost every problem can be solved using list comprehension as a shorthand to naive approach and this problem isn’t an exception. In this, we just iterate through each list picking just the n -1th index element to build the resultant list.




# Python3 code to demonstrate
# Rear elements from Tuple Strings
# using list comprehension
  
# initializing tuple
test_tuple = ('GfG', 'for', 'Geeks')
  
# printing original tuple 
print("The original tuple : " + str(test_tuple))
  
# using list comprehsion
# Rear elements from Tuple Strings
res = list(sub[len(sub) - 1] for sub in test_tuple)
  
# print result
print("The rear index string character list : " + str(res))
Output :
The original tuple : ('GfG', 'for', 'Geeks')
The rear index string character list : ['G', 'r', 's']

 

Method #2 : Using loop
This task can also be performed using brute force manner. In this, we just iterate the each string element and extract the rear element when the index reaches size – 1th element.




# Python3 code to demonstrate
# Rear elements from Tuple Strings
# using list comprehension
  
# initializing tuple
test_tuple = ('GfG', 'for', 'Geeks')
  
# printing original tuple 
print("The original tuple : " + str(test_tuple))
  
# using list comprehsion
# Rear elements from Tuple Strings
res = []
for sub in test_tuple :
    N = len(sub) - 1 
    res.append(sub[N])
  
# print result
print("The rear index string character list : " + str(res))
Output :
The original tuple : ('GfG', 'for', 'Geeks')
The rear index string character list : ['G', 'r', 's']

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