Added tests for multiply function and fixed linting issues

.gitignore

@@ -6,4 +6,4 @@ venv/
 *.idea
 *.ruff_cache
 
-.codegpt
+.codegpt

solutions/multiply.py

@@ -1,13 +1,19 @@
 #!/usr/bin/env python3
 # -- coding: utf-8 --
+"""
+This module contains unit tests for the `multiply` function in `multiply.py`.
+The tests cover various scenarios including valid inputs, defensive assertions, and boundary cases.
+"""
+
+
 def multiply(a: float, b: float) -> float:
     """
     Multiplies two numbers and returns the result.
 
     Args:
-        a (float): The first number to be multiplied. 
+        a (float): The first number to be multiplied.
         Must be a real number (no specific range constraints).
-        b (float): The second number to be multiplied. 
+        b (float): The second number to be multiplied.
         Must be a real number (no specific range constraints).
 
     Returns:
@@ -28,5 +34,5 @@ def multiply(a: float, b: float) -> float:
         raise TypeError("The first argument must be a number.")
     if not isinstance(b, (int, float)):
         raise TypeError("The second argument must be a number.")
-    
+
     return a * b

solutions/tests/test_multiply.py

@@ -7,7 +7,8 @@
 """
 
 import unittest
-from ..multiply import multiply
+from solutions.multiply import multiply
+
 
 class TestMultiplyFunction(unittest.TestCase):
     """Unit tests for the `multiply` function."""
@@ -43,5 +44,6 @@ def test_multiply_invalid_second_argument(self):
         with self.assertRaises(TypeError):
             multiply(3, None)
 
+
 if __name__ == "__main__":
     unittest.main()