Python | Convert Integral list to tuple list
Last Updated :
12 Apr, 2023
Sometimes, while working with data, we can have a problem in which we need to perform type of interconversions of data. There can be a problem in which we may need to convert integral list elements to single element tuples. Let’s discuss certain ways in which this task can be performed.
Method #1 : Using list comprehension List comprehension can be used as a shorthand method to solve this particular problem. In this, we iterate through the list and convert each integer element into a tuple object.
Python3
test_list = [ 1 , 4 , 6 , 8 , 9 ]
print ( "The original list : " + str (test_list))
res = [(ele, ) for ele in test_list]
print ( "List after conversion to tuple list : " + str (res))
|
Output
The original list : [1, 4, 6, 8, 9]
List after conversion to tuple list : [(1,), (4,), (6,), (8,), (9,)]
Time Complexity: O(n), where n is the length of the input list. This is because we’re using list comprehension which has a time complexity of O(n) in the worst case.
Auxiliary Space: O(n), as we’re using additional space res other than the input list itself with the same size of input list.
Method #2 : Using zip() + list() This is the simplest method to perform this particular task. The zip() when applied to list of integers, it converts each element to tuple. It returns a zip object and hence it has to converted back to list using list().
Python3
test_list = [ 1 , 4 , 6 , 8 , 9 ]
print ( "The original list : " + str (test_list))
res = list ( zip (test_list))
print ( "List after conversion to tuple list : " + str (res))
|
Output
The original list : [1, 4, 6, 8, 9]
List after conversion to tuple list : [(1,), (4,), (6,), (8,), (9,)]
Method #3 : Using map()
In this method, we use the map() function to iterate through the original list and convert each integer element into a tuple object using a lambda function. The map() returns an iterable map object which is then converted to a list using the list() function. This method is also simple and easy to use.
Python3
test_list = [ 1 , 4 , 6 , 8 , 9 ]
print ( "The original list : " , test_list)
res = list ( map ( lambda x: (x,), test_list))
print ( "List after conversion to tuple list : " , res)
|
Output
The original list : [1, 4, 6, 8, 9]
List after conversion to tuple list : [(1,), (4,), (6,), (8,), (9,)]
Time Complexity: O(n)
Auxiliary Space: O(n)
Like Article
Suggest improvement
Share your thoughts in the comments
Please Login to comment...