# Import our class form outer module
from complex import Complex
# Create a new Complex class instance
comp = Complex(4, 3)
print comp
print comp.abs
# Class definition for complex number. More details on Complex number is
# here: https://en.wikipedia.org/wiki/Complex_number
class Complex:
"""A complex number is a number that can be expressed in the form a + bi,
where a and b are real numbers and i is the imaginary unit, that satisfies
the equation i**2=-1."""
# The line above called "the doc string" and would appears in all hints and
# __doc__ attribute later.
# This is the instance constructor, place to initialize values of exact
# instance, please do not confuse it with __new__ which is more complicated
# topic of for next level lecture.
def __init__(self, re, im=0):
self.re = re
self.im = im
def __repr__(self):
# Method to create object representation.
return "{re} + {im}i".format(**self.__dict__)
# Following line means that name of this method would be used as name of
# read-only property (to make writable one there additional syntax)
@property
def abs(self):
return (self.re**2 + self.im**2)**0.5
