Count Consonants in a String in Python

vowels = "aeiouAEIOU"

my_string = "Hello World!"

count = 0

for char in my_string:
    if char.isalpha() and char not in vowels:
        count += 1

print(count)

def count_consonants(my_string: str) -> int:
    """
    Function to count consonants in a given string

    :param my_string: The input string
    :return: The count of consonants in the input string
    """
    vowels = "aeiouAEIOU"

    count = 0

    for char in my_string:
        if char.isalpha() and char not in vowels:
            count += 1
    return count


example_string = "Hello World!"

print(count_consonants(example_string))

import pytest

# Assuming that the count_consonants function is stored under app.string_operations
from app.string_operations import count_consonants


@pytest.mark.parametrize(
    "input_string, expected_output",
    [
        ("Hello World!", 7),
        ("Universe", 4),
        ("Universe!", 4),
        ("", 0),
        (" ", 0),
        ("!", 0),
    ],
)
def test_count_consonants(input_string, expected_output):
    """
    Test the count_consonants across different input strings

    :param input_string: The input string to be tested
    :param expected_output: The expected count of consonants in the string
    :return:
    """
    assert count_consonants(input_string) == expected_output

============================= test session starts =============================
collecting ... collected 6 items

test_string_operations.py::test_count_consonants[Hello World!-7] PASSED  [' 16%']
test_string_operations.py::test_count_consonants[Universe-4] PASSED      [' 33%']
test_string_operations.py::test_count_consonants[Universe!-4] PASSED     [ '50%']
test_string_operations.py::test_count_consonants[-0] PASSED              [ '66%']
test_string_operations.py::test_count_consonants[ -0] PASSED             [ '83%']
test_string_operations.py::test_count_consonants[!-0] PASSED             ['100%']

============================== 6 passed in '0.02s' ==============================