определить, имеются ли в одномерном массиве только два одинаковых элемента. in python

To determine if a one-dimensional array has only two identical elements in Python, you can use the following approach:

1. Iterate over the elements in the array.
2. Keep a counter variable to count the number of occurrences of each element.
3. If the counter variable exceeds 2 for any element, then there are more than two identical elements in the array.
4. If the counter variable is exactly 2 for any element, then there are exactly two identical elements in the array.
5. If none of the elements in the array satisfy the condition above, then there are fewer than two identical elements in the array.

Here's an example implementation:

main.py
def has_two_identical_elements(arr):
    for elem in arr:
        counter = arr.count(elem)
        if counter >= 2:
            return True
    return False
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You can test this function like this:

main.py
arr = [1, 2, 3, 4, 5]        # False
print(has_two_identical_elements(arr))

arr = [1, 2, 2, 4, 5]        # True
print(has_two_identical_elements(arr))

arr = [1, 2, 3, 4, 4]        # True
print(has_two_identical_elements(arr))
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This will output:

main.py
False
True
True
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By using this approach, you can determine if there are only two identical elements in a one-dimensional array in Python.