Question

i have done this in c++ but i am trying it to python and have difficulties.I did this code:

class mycomplex:
def __init__(self,real=None,imag=None):
    self.real=real
    self.imag=imag

def read_data(self):
    self.real=input("Give the real part :")
    self.imag=input("Give the imag part :")

def addition(self,complex):
    return mycomplex(self.real+complex.real,self.imag+complex.imag)


def __str__(self):
    return ("{0} {1} {2} {3}{4}".format("The complex is : ",self.real,"+",self.imag,"j"))


if __name__=="__main__":

a=mycomplex()
b=mycomplex()
a.read_data()
b.read_data()
print(a)
print(b)
c=a.addition(b)
print(c)

1) First of all it doesn’t work because i have in the init method 2 arguments and when i try to create an instance with a=mycomplex() it gives me an error of course.Can i handle this in some way without changing the init ?

2) In order for me to understand i want to use the addition method with 2 ways like i say in the code.It will help me i think.It’s different to say a.addition() and c=a.addition(b).

3) If you have any better suggestions from implementing the above,please say it.I think you understand what i am trying to show you.

Thank you!

Answer 1

1) yes you can make it work by using default values:

def __init__(self,real=0,imag=0):
    ...

the default values specified in the function signature will be used in place of the missing arguments.

2) i do not understand your first way of writing an addition: when you write a.addition(), what are you adding to a ?

the second way (a.addition(b)) is pretty clear, but you need to change the way you define addition():

def addition(self,complex):
    return mycomplex(real+complex.real,imag+complex.imag)