Get Index Of Multiple List Elements In Python

Below, are the ways To Get Index Of Multiple List Elements In Python.

Using Naive Method
Using a For Loop
Using List Comprehension
Using filter() Function

Get Index Of Multiple List Elements Using Naive Method

In this example, below function `get_indices` takes a list of `lst` and a list of `targets`, returning the indices of the targets found in the original list. In the provided example, it prints the indices of ‘apple’ and 2.

Python3

def get_indices(lst, targets):
    indices = []
    for target in targets:
        if target in lst:
            indices.append(lst.index(target))
    return indices
 
# Example usage:
my_list = [1, 'apple', 3, 'banana', 2, 'orange']
target = ['apple', 2]
result = get_indices(my_list, target)
print(result)

Output

[1, 4]

Get Index Of Multiple List Elements Using For Loop

In this example, in code the`get_indices` function utilizes the `enumerate` function to iterate through elements and their indices in the list `lst`. It returns the indices of elements present in the `targets` list. In the given example, it prints the indices of ‘apple’ and 2 .

Python3

def get_indices(lst, targets):
    indices = []
    for index, element in enumerate(lst):
        if element in targets:
            indices.append(index)
    return indices
 
# Example usage:
my_list = [1, 'apple', 3, 'banana', 2, 'orange']
target = ['apple', 2]
result = get_indices(my_list, target)
print(result)

Output

[1, 4]

Get Index Of Multiple List Elements Using List Comprehension

In this example, in below code the `get_indices` function utilizes a list comprehension to directly generate a list of indices for elements in the `targets` list found in the original list `lst`. In the provided example, it prints the indices of ‘apple’ and 2.

Python3

def get_indices(lst, targets):
    return [index for index, element in enumerate(lst) if element in targets]
 
# Example usage:
my_list = [1, 'apple', 3, 'banana', 2, 'orange']
target = ['apple', 2]
result = get_indices(my_list, target)
print(result)

Output

[1, 4]

Get Index Of Multiple List Elements Using filter() Function

In this example, in below code The `get_indices` function employs the `filter` function with a lambda expression to create a list of indices for elements in the `targets` list found in the original list `lst`. In the provided example, it prints the indices of ‘apple’ and 2 .

Python3

def get_indices(lst, targets):
    return list(filter(lambda x: lst[x] in targets, range(len(lst))))
 
# Example usage:
my_list = [1, 'apple', 3, 'banana', 2, 'orange']
target = ['apple', 2]
result = get_indices(my_list, target)
print(result)

Output

[1, 4]