This article deals with initializing the tuples with parameters. Namely, default value, size, and specific value at a specific index. Let’s discuss certain ways in which this task can be performed.
Method #1 : Using tuple() + * operator This task can be performed using a combination of the above functionalities. In this, we extend the default values using the * operator and perform the formation of a tuple using tuple()
Python3
# Python3 code to demonstrate working of# Initialize tuples with parameters# Using tuple() + * operator# Initializing size N = 6# Initializing default value def_val = 2# Initializing index to add value idx = 3# Initializing value to be added val = 9# Initialize tuples with parameters# Using tuple() + * operatorres = [def_val] * Nres[idx] = val res = tuple(res)# printing resultprint("The formulated tuple is : " + str(res)) |
The formulated tuple is : (2, 2, 2, 9, 2, 2)
Time Complexity: O(N), where N is the size of the tuple to be initialized.
Auxiliary Space: O(N)
Method #2: Using generator expression + tuple() This task can be performed using generator expression along with tuple() as well. The elements are created one by one on this and a specific element is initialized at a specific position using comparison.
Python3
# Python3 code to demonstrate working of# Initialize tuples with parameters# Using tuple() + generator expression# Initializing size N = 6# Initializing default value def_val = 2# Initializing index to add value idx = 3# Initializing value to be added val = 9# Initialize tuples with parameters# Using tuple() + generator expressionres = tuple(val if i == idx else def_val for i in range(N))# printing resultprint("The formulated tuple is : " + str(res)) |
The formulated tuple is : (2, 2, 2, 9, 2, 2)
Approach#2: Using the list: The approach used in the given code is to first create a list of size N with all elements initialized to the default value def_val using list comprehension. Then, the value val is inserted at index idx in the list. Finally, the list is converted to a tuple using the tuple() function.
- Initialize the size N, default value def_val, index idx and value to be added val.
- Create a list of size N with all elements initialized to def_val using list comprehension.
- Replace the element at index idx in the list with val.
- Convert the list to a tuple using the tuple() function.
- Print the tuple.
Python3
N = 6def_val = 2idx = 3val = 9tup = tuple([def_val]*N)lst = list(tup)lst[idx] = valtup = tuple(lst)print("The formulated tuple is:", tup) |
The formulated tuple is: (2, 2, 2, 9, 2, 2)
Time Complexity: O(N) because the list comprehension takes O(N) time to create a list of size N with all elements initialized to def_val.
Space Complexity: O(N) because a list of size N is created to store the elements before converting it to a tuple. The tuple itself takes O(N) space as well.
