Python Program to Find Index of a Tuple Item

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In the previous article, we have discussed Python Program for memoryview() Function
The tuple index function in Python returns the index of a given tuple item. The index position of the first found value is returned by the tuple index function.

Syntax:

TupleName.index(tupleValue, start, end)

If you specify a start value, the index function will begin searching from that point. Similarly, setting the end position causes the tuple index function to stop looking at that number.

Examples:

Example1:

Input:

Given tuple = (10, 20, 30, 50, 70, 20)
Given first number = 50
Given second number = 20
Given start position = 2

Output:

The given number's 50 index position =  3
The given number's 20 index position after the given start position 2 =  5

Example2:

Input:

Given tuple = (1, 3, 5, 7, 8, 2, 5)
Given first number = 3
Given second number = 5
Given start position = 3

Output:

The given number's 3 index position =  1
The given number's 5 index position after the given start position 3 =  6

Program to Find Index of a Tuple Item in Python

Method #1: Using Built-in Functions (Static Input)

Approach:

  • Give the tuple as static input and store it in a variable.
  • Give the number as static input and store it in another variable.
  • Get the index position of the given number using the index() method and store it in another variable.
  • Print the index position of the given number.
  • Give the second number as static input and store it in another variable.
  • Give the start position as static input and store it in another variable.
  • Pass the given second number, start position as arguments to the index() method to get the index value of the given second number after the given start position.
  • Store it in another variable.
  • Print the index position of the given second number after the given start position.
  • The Exit of Program.

Below is the implementation:

# Give the tuple as static input and store it in a variable.
gvn_tupl = (10, 20, 30, 50, 70, 20)
# Give the number as static input and store it in another variable.
gvn_numb1 = 50
# Get the index position of the given number using the index() method and
# store it in another variable.
indx_1 = gvn_tupl.index(gvn_numb1)
# Print the index position of the given number.
print("The given number's", gvn_numb1, "index position = ", indx_1)
# Give the second number as static input and store it in another variable.
gvn_numb2 = 20
# Give the start position as static input and store it in another variable.
gvn_strtpositn = 2
# Pass the given second number, start position as arguments to the index()
# method to get the index value of the given second number after the given
# start position.
# Store it in another variable.
indx_2 = gvn_tupl.index(gvn_numb2, gvn_strtpositn)
# Print the index position of the given second number after the given
# start position.
print("The given number's", gvn_numb2,
      "index position after the given start position", gvn_strtpositn, "= ", indx_2)

Output:

The given number's 50 index position =  3
The given number's 20 index position after the given start position 2 =  5

Method #2: Using Built-in Functions (User Input)

Approach:

  • Give the tuple user input using list(),map(),input(),and split() functions and store it in a variable.
  • Give the number as user input using the int(input()) function and store it in another variable.
  • Get the index position of the given number using the index() method and store it in another variable.
  • Print the index position of the given number.
  • Give the second number as user input using the int(input()) function and store it in another variable.
  • Give the start position as user input using the int(input()) function and store it in another variable.
  • Pass the given second number, start position as arguments to the index() method to get the index value of the given second number after the given start position.
  • Store it in another variable.
  • Print the index position of the given second number after the given start position.
  • The Exit of Program.

Below is the implementation:

# Give the tuple user input using list(),map(),input(),and split() functions and store it in a variable.
gvn_tupl = tuple(map(int, input(
    'Enter some random Tuple Elements separated by spaces = ').split()))
# Give the number as user input using the int(input()) function and store it in another variable.
gvn_numb1 = int(input("Enter some random number = "))
# Get the index position of the given number using the index() method and
# store it in another variable.
indx_1 = gvn_tupl.index(gvn_numb1)
# Print the index position of the given number.
print("The given number's", gvn_numb1, "index position = ", indx_1)
# Give the second number as user input using the int(input()) function and
# store it in another variable.
gvn_numb2 =  int(input("Enter some random number = "))
# Give the start position as user input using the int(input()) function and
# store it in another variable.
gvn_strtpositn =  int(input("Enter some random number = "))
# Pass the given second number, start position as arguments to the index()
# method to get the index value of the given second number after the given
# start position.
# Store it in another variable.
indx_2 = gvn_tupl.index(gvn_numb2, gvn_strtpositn)
# Print the index position of the given second number after the given
# start position.
print("The given number's", gvn_numb2,
      "index position after the given start position", gvn_strtpositn, "= ", indx_2)

Output:

Enter some random Tuple Elements separated by spaces = 1 3 5 7 8 2 5
Enter some random number = 3
The given number's 3 index position = 1
Enter some random number = 5
Enter some random number = 3
The given number's 5 index position after the given start position 3 = 6

Program to Find Index of a Tuple Item in Python without using index() Function

Below is the implementation:

gvn_tupl = (10, 40, 50, 30, 60, 40, 20, 40, 30)
print(gvn_tupl)

gvn_valu = 40
for itr in range(len(gvn_tupl)):
    if gvn_tupl[itr] == gvn_valu:
        print("The given number", gvn_valu, "index position = ", itr)
        break
print("The all Index Positions of given number:")
for k in range(len(gvn_tupl)):
    if gvn_tupl[k] == gvn_valu:
        print("Index Position of 20 = ", k)

print("The all the Index Positions of given number using enumerate function:")
for itor, p in enumerate(gvn_tupl):
    if p == gvn_valu:
        print("Index Position of 20 = ", itor)

Output:

(10, 40, 50, 30, 60, 40, 20, 40, 30)
The given number 40 index position =  1
The all Index Positions of given number:
Index Position of 20 =  1
Index Position of 20 =  5
Index Position of 20 =  7
The all the Index Positions of given number using enumerate function:
Index Position of 20 =  1
Index Position of 20 =  5
Index Position of 20 =  7

Find a Comprehensive Collection of Python Built in Functions that you need to be aware of and use them as a part of your program.