10.10.2 Class Complex Definition

Method __init__

# complexnumber.py
"""Complex class with overloaded operators."""

class Complex:
    """Complex class that represents a complex number 
    with real and imaginary parts."""

    def __init__(self, real, imaginary):
        """Initialize Complex class's attributes."""
        self.real = real
        self.imaginary = imaginary

Overloaded + Operator

def __add__(self, right):
        """Overrides the + operator."""
        return Complex(self.real + right.real, 
                       self.imaginary + right.imaginary)

Overloaded += Augmented Assignment

def __iadd__(self, right):
        """Overrides the += operator."""
        self.real += right.real
        self.imaginary += right.imaginary
        return self

Method __repr__

def __repr__(self):
       """Return string representation for repr()."""
        return (f'({self.real} ' + 
                ('+' if self.imaginary >= 0 else '-') +
                f' {abs(self.imaginary)}i)')

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