Question

I am trying to add/sub/multiply two complex numbers. Terminal said there is a SyntaxError at "ComplexCompute".
What does that mean? Thanks.

Class ComplexCompute (object):
    def __init__(self, realPart, imagPart):
        self.realPart = realPart
        self.imagPart = imagPart
    def __add__(self, other)
        r1 = self.imagPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = self.imagPart
        resultR = r1+r2
        resultI = i1+i2
        result = complex(resultR, resultI)
        return result
    def __sub__(self, other)
        r1 = self.imagPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = self.imagPart
        resultR = r1-r2
        resultI = i1-i2
        result = complex(resultR, resultI)
        return result
    def __mul__(self, other)
        r1 = self.imagPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = self.imagPart
        resultR = (r1*r2-i1*i2)
        resultI = (r1*i2+r2*i1)
        result = complex(resultR, resultI)
        return result    
c1 = ComplexCompute(2,3)
c2 = ComplexCompute(1,4)
print c1+c2
print c1-c2
print c1*c2

I edited the name of Class in some method.
But the terminal showed:

<main.Complex object at 0x1005d8b90>

<main.Complex object at 0x1005d8b90>

<main.Complex object at 0x1005d8b90>

class Complex (object):
    def __init__(self, realPart, imagPart):
        self.realPart = realPart
        self.imagPart = imagPart

    def __add__(self, other):
        r1 = self.imagPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = other.imagPart 
        resultR = r1+r2
        resultI = i1+i2
        result = Complex(resultR, resultI)
        return result

    def __sub__(self, other):
        r1 = self.imagPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = other.imagPart
        resultR = r1-r2
        resultI = i1-i2
        result = Complex(resultR, resultI)
        return result

    def __mul__(self, other):
        r1 = self.imagPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = other.imagPart
        resultR = (r1*r2-i1*i2)
        resultI = (r1*i2+r2*i1)
        result = Complex(resultR, resultI)
        return result   

c1 = Complex(2,3)
c2 = Complex(1,4)

print c1+c2
print c1-c2
print c1*c2

the str method: (which not works)

def __str__(self):
    return '%d+(%d)j'&(self.realPart, self.imagPart)

Latest version:
(Terminal shows SyntaxError ‘return’ outside function in div method)

class Complex (object):
    def __init__(self, realPart, imagPart):
    self.realPart = realPart
    self.imagPart = imagPart            

    def __str__(self):
        if type(self.realPart) == int and type(self.imagPart) == int:
            if self.imagPart >=0:
                return '%d+%di'%(self.realPart, self.imagPart)
            elif self.imagPart <0:
                return '%d%di'%(self.realPart, self.imagPart)
        else:
            if self.imagPart >=0:
                return '%f+%fi'%(self.realPart, self.imagPart)
            elif self.imagPart <0:
               return '%f%fi'%(self.realPart, self.imagPart)

    def __add__(self, other):
        r1 = self.realPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = other.imagPart
        resultR = r1+r2
        resultI = i1+i2
        result = Complex(resultR, resultI)
        return result

    def __sub__(self, other):
        r1 = self.realPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = other.imagPart
        resultR = r1-r2
        resultI = i1-i2
        result = Complex(resultR, resultI)
        return result   

    def __mul__(self, other):
        r1 = self.realPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = other.imagPart
        resultR = (r1*r2-i1*i2)
        resultI = (r1*i2+r2*i1)
        result = Complex(resultR, resultI)
        return result

    def __div__(self, other):
        r1 = self.realPart
        i1 = self.imagPart
        r2 = other.realPart
        i2 = other.imagPart
        resultR = float(float(r1*r2+i1*i2)/float(r2*r2+i2*i2))
        resultI = float(float(r2*i1-r1*i2)/float(r2*r2+i2*i2))
        result = Complex(resultR, resultI)
        return result

c1 = Complex(2,3)
c2 = Complex(1,4)

print c1+c2
print c1-c2
print c1*c2
print c1/c2

Answer 1

Other than your indentation errors (which I assume is due to copy/paste issues), You want it to say class instead of Class (Note the lower case c)

Also, you are missing : after some of your methods:

def __add__(self,other):
                      #^ NEED THIS