+- Python Forum (https://python-forum.io)
+-- Forum: Python Coding (https://python-forum.io/forum-7.html)
+--- Forum: Homework (https://python-forum.io/forum-9.html)
+--- Thread: Class for Vector (/thread-21592.html)
Class for Vector - no_named_nobody - Oct-06-2019
Hello!
I am new in programming in python. I got a homework to create class MyVector,
- constructor will accept (to self) one parameter (it will be one-dimensional array)
- method get_vector(self) return one-dimensional array containing the vector elements
- with special method __mul__(self,other) implement the dot product of two objects MyVector (the output is a scalar, so one number)
btw I cant import other modules.
I have this:
[Image: ZvD49DyKCd.jpg]
In my mind, get_vector(self) is right. But __mul__(self,other) is not working properly. Do you know how to make things right?
RE: Class for Vector - buran - Oct-06-2019
Please, don't post images of code. Copy/paste in python tags.
See BBcode help for more info.
RE: Class for Vector - no_named_nobody - Oct-06-2019
(Oct-06-2019, 02:44 PM)buran Wrote: Please, don't post images of code. Copy/paste in python tags. See BBcode help for more info.Sorry, there is:
class MyVector:
def __init__(self, a):
self.a = a
def get_vector(self):
return(self.a)
def __mul__(self, other):
dot_product = 0
for x in range(len(self.a)):
dot_product += self.a[x]*other.a[x]
return dot_product
RE: Class for Vector - buran - Oct-06-2019
You need to dedent line 12 - i.e. you want to return dot_product only after the for loop ended.
I understand that this is homework and you need to do what you are asked to do. However, for your information, using get function like this get_vector is not pythonic. i.e. you can just access the a property (of cource you want more meaningful name)
RE: Class for Vector - no_named_nobody - Oct-06-2019
Oh, thanks. I didnt notice!
As you said - we need to use this "unpythonic" method, but thank you for info.