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Python | Sort lists in tuple
  • Last Updated : 14 May, 2020

Sometimes, while working with Python tuples, we can have a problem in which we need to sort the tuples which constitutes of lists and we need to sort each of them. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using tuple() + sorted() + generator expression
This task can be performed using the combination of above functions. In this, we iterate through each list using generator expression and perform the sort operation using sorted().




# Python3 code to demonstrate working of
# Sort lists in tuple
# Using tuple() + sorted() + generator expression
  
# Initializing tuple
test_tup = ([7, 5, 4], [8, 2, 4], [0, 7, 5])
  
# printing original tuple
print("The original tuple is : " + str(test_tup))
  
# Sort lists in tuple
# Using tuple() + sorted() + generator expression
res = tuple((sorted(sub) for sub in test_tup))
  
# printing result
print("The tuple after sorting lists : " + str(res))
Output :
The original tuple is : ([7, 5, 4], [8, 2, 4], [0, 7, 5])
The tuple after sorting lists : ([4, 5, 7], [2, 4, 8], [0, 5, 7])

 

Method #2 : Using map() + sorted()
This method performs the similar task as the above method, but it uses map() to extend the logic to each element of tuple, the task performed by list comprehension in above method.






# Python3 code to demonstrate working of
# Sort lists in tuple
# Using map() + sorted()
  
# Initializing tuple
test_tup = ([7, 5, 4], [8, 2, 4], [0, 7, 5])
  
# printing original tuple
print("The original tuple is : " + str(test_tup))
  
# Sort lists in tuple
# Using map() + sorted()
res = tuple(map(sorted, test_tup))
  
# printing result
print("The tuple after sorting lists : " + str(res))
Output :
The original tuple is : ([7, 5, 4], [8, 2, 4], [0, 7, 5])
The tuple after sorting lists : ([4, 5, 7], [2, 4, 8], [0, 5, 7])

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