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complex numbers - mcgrim - May-07-2019
I am trying to come up with methods for addition and subtraction of complex numbers,
so that the print statement should generate something like
1+2i
1-2i
if I want to use an interval (1,2).
This is my code:
class comp_num(object):
def __init__(self, real_1, real_2):
self.real_1=real_1
self.real_2=real_2
def __add__(self):
a,b=self.real_1, self.real_2
return complex(a,b)
def __sub__(self):
a,b=self.real_1, self.real_2
return complex(a,b).conjugate()
def __repr__(self):
return '[{},{}]'.format(self.real_1. self.real_2)
print(comp_num(1,2))and this is the error I get:Error: runfile('C:/Users/Desktop/python ode/ex8.py', wdir='C:/Users/Desktop/python ode')
Traceback (most recent call last):
File "<ipython-input-807-415135f62ea4>", line 1, in <module>
runfile('C:/Users/Desktop/python ode/ex8.py', wdir='C:/Users/Desktop/python ode')
File "C:\Users\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 668, in runfile
execfile(filename, namespace)
File "C:\Users\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 108, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)
File "C:/Users/Desktop/python ode/ex8.py", line 28, in <module>
print(comp_num(1,2))
File "C:/Users/Desktop/python ode/ex8.py", line 22, in __repr__
return '[{},{}]'.format(self.real_1. self.real_2)
AttributeError: 'int' object has no attribute 'self'RE: complex numbers - buran - May-07-2019
line 15, format() method - you have dot instead of comma between self.real_1 and self.real_2
RE: complex numbers - mcgrim - May-07-2019
Thank you.
It runs now but only prints [1,2].
How do I actually make sure that 1+2i and 1-2i are printed ?
RE: complex numbers - buran - May-07-2019
(May-07-2019, 12:36 PM)mcgrim Wrote: How do I actually make sure that 1+2i and 1-2i are printed ?
change your __repr__ function accordingly (i.e. to output what you want)
I think there is some confusion as it's not clear what you want to achieve
>>> complex(1, 2) (1+2j) >>> complex(1, 2).conjugate() (1-2j) >>>