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Tested on Python 3.12

Here's how you can access the indices with their corresponding array's elements using for loops, while loops and some looping functions.

items = [8, 23, 45, 12, 78]

for i, item in enumerate(items, start=1000):
    print(i, item)

Result:

#    1000 8
#    1001 23
#    1002 45
#    1003 12
#    1004 78

Result:

#    0  8
#    1  23
#    2  45
#    3  12
#    4  78

Tested on Python 3.12

Here are twelve examples of how you can access the indices with their corresponding array's elements using for loops, while loops and some looping functions. Note that array indices always start from zero by default (see example 4 to change this).

items = [8, 23, 45, 12, 78]

for i, item in enumerate(items, start=100):
    print(i, item)

Result:

#    100 8
#    101 23
#    102 45
#    103 12
#    104 78

Result:

#    0  8
#    1  23
#    2  45
#    3  12
#    4  78

12. Also, it's nice to iterate list's elements inside class' Static Method.

items = [8, 23, 45, 12, 78]

class ElementPlus:
    @staticmethod                            # decorator
    def indexForEachOfMy(iterable):
        for pair in enumerate(iterable):
            print pair

ElementPlus.indexForEachOfMy(items)

Result:

#    (0, 8)
#    (1, 23)
#    (2, 45)
#    (3, 12)
#    (4, 78)

Tested on Python 3.12

Result:

#    0 8
#    1 23
#    2 45
#    3 12
#    4 78

Result:

#    index/value (0, 8)
#    index/value (1, 23)
#    index/value (2, 45)
#    index/value (3, 12)
#    index/value (4, 78)

Result:

#    index 0 for value 8
#    index 1 for value 23
#    index 2 for value 45
#    index 3 for value 12
#    index 4 for value 78

Result:

#    1000 8
#    1001 23
#    1002 45
#    1003 12
#    1004 78

Result:

#    ('Index:', 0, 'Value:', 8)
#    ('Index:', 1, 'Value:', 23)
#    ('Index:', 2, 'Value:', 45)
#    ('Index:', 3, 'Value:', 12)
#    ('Index:', 4, 'Value:', 78)

Result:

#    0 8
#    1 23
#    2 45
#    3 12
#    4 78

Result:

#    0 8
#    1 23
#    2 45
#    3 12
#    4 78

Result:

#    (0, 8)
#    (1, 23)
#    (2, 45)
#    (3, 12)
#    (4, 78)

Result:

#    [(0, 8), (1, 23), (2, 45), (3, 12), (4, 78)]

Result:

#    0: 8
#    1: 23
#    2: 45
#    3: 12
#    4: 78

Result:

#    0  8
#    1  23
#    2  45
#    3  12
#    4  78

Tested on Python 3.12

Result:

#    0 8
#    1 23
#    2 45
#    3 12
#    4 78

Result:

#    index/value (0, 8)
#    index/value (1, 23)
#    index/value (2, 45)
#    index/value (3, 12)
#    index/value (4, 78)

Result:

#    index 0 for value 8
#    index 1 for value 23
#    index 2 for value 45
#    index 3 for value 12
#    index 4 for value 78

Result:

#    1000 8
#    1001 23
#    1002 45
#    1003 12
#    1004 78

Result:

#    ('Index:', 0, 'Value:', 8)
#    ('Index:', 1, 'Value:', 23)
#    ('Index:', 2, 'Value:', 45)
#    ('Index:', 3, 'Value:', 12)
#    ('Index:', 4, 'Value:', 78)

Result:

#    0 8
#    1 23
#    2 45
#    3 12
#    4 78

Result:

#    0 8
#    1 23
#    2 45
#    3 12
#    4 78

Result:

#    (0, 8)
#    (1, 23)
#    (2, 45)
#    (3, 12)
#    (4, 78)

Result:

#    [(0, 8), (1, 23), (2, 45), (3, 12), (4, 78)]

Result:

#    0: 8
#    1: 23
#    2: 45
#    3: 12
#    4: 78

Result:

#    0  8
#    1  23
#    2  45
#    3  12
#    4  78

items = [8, 23, 45, 12, 78]
indices = [0, 1, 2, 3, 4]

for item, index in zip(items, indices):
    print("{}: {}".format(index, item))

items = [8, 23, 45, 12, 78]
indices = []

for index in range(len(items)):
    indices.append(index)

for item, index in zip(items, indices):
    print("{}: {}".format(index, item))