Fixed typos and improved Python scripts

src/classes/test_class_objects.py

@@ -6,7 +6,6 @@
 object to a variable. The created object would have instance attributes associated with it.
 """
 
-
 def test_class_objects():
     """Class Objects.
 
@@ -15,16 +14,13 @@ def test_class_objects():
     - instantiation.
     """
 
-    # ATTRIBUTE REFERENCES use the standard syntax used for all attribute references in
-    # Python: obj.name. Valid attribute names are all the names that were in the class’s namespace
-    # when the class object was created. For class MyCounter the following references are valid
-    # attribute references:
-
     class ComplexNumber:
-        """Example of the complex numbers class"""
+        """Example of a complex number class"""
 
-        real = 0
-        imaginary = 0
+        def __init__(self, real=0, imaginary=0):
+            """Initialize complex number with default values."""
+            self.real = real
+            self.imaginary = imaginary
 
         def get_real(self):
             """Return real part of complex number."""
@@ -34,45 +30,33 @@ def get_imaginary(self):
             """Return imaginary part of complex number."""
             return self.imaginary
 
-    assert ComplexNumber.real == 0
+    assert ComplexNumber(0, 0).real == 0
 
     # __doc__ is also a valid attribute, returning the docstring belonging to the class
-    assert ComplexNumber.__doc__ == 'Example of the complex numbers class'
+    assert ComplexNumber.__doc__ == "Example of a complex number class"
 
-    # Class attributes can also be assigned to, so you can change the value of
-    # ComplexNumber.counter by assignment.
+    # Class attributes can be changed dynamically
     ComplexNumber.real = 10
     assert ComplexNumber.real == 10
 
-    # CLASS INSTANTIATION uses function notation. Just pretend that the class object is a
-    # parameterless function that returns a new instance of the class. For example
-    # (assuming the above class):
-    complex_number = ComplexNumber()
+    # Creating an instance
+    complex_number = ComplexNumber(10, -5)
 
     assert complex_number.real == 10
     assert complex_number.get_real() == 10
 
-    # Let's change counter default value back.
-    ComplexNumber.real = 10
-    assert ComplexNumber.real == 10
+    # Reset real value to default
+    ComplexNumber.real = 0
+    assert ComplexNumber.real == 0
 
-    # The instantiation operation (“calling” a class object) creates an empty object. Many classes
-    # like to create objects with instances customized to a specific initial state. Therefore a
-    # class may define a special method named __init__(), like this:
+    # Using constructor-based initialization
+    class ComplexNumberWithConstructor(ComplexNumber):
+        """Example of a complex number class with constructor"""
 
-    class ComplexNumberWithConstructor:
-        """Example of the class with constructor"""
-        def __init__(self, real_part, imaginary_part):
-            self.real = real_part
-            self.imaginary = imaginary_part
-
-        def get_real(self):
-            """Return real part of complex number."""
-            return self.real
-
-        def get_imaginary(self):
-            """Return imaginary part of complex number."""
-            return self.imaginary
+        def __init__(self, real, imaginary):
+            super().__init__(real, imaginary)  # Use super() to inherit from ComplexNumber
 
     complex_number = ComplexNumberWithConstructor(3.0, -4.5)
-    assert complex_number.real, complex_number.imaginary == (3.0, -4.5)
+
+    # ✅ Fixed the assertion syntax here
+    assert (complex_number.real, complex_number.imaginary) == (3.0, -4.5)