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Kurda Yon wrote:
> Hi,
>
> I found one example which defines the addition of two vectors as a
> method of a class. It looks like that:
>
> class Vector:
> def __add__(self, other):
> data = []
> for j in range(len(self.data)):
> data.append(self.data[j] + other.data[j])
> return Vector(data)
>
> In this example one uses "self" and "other". Does one really need to
> use this words? And, if yes, why? I have replaced "self" by "x" and
> "other" by "y" and everything looks OK. Is it really OK or I can have
> some problem in some cases?
>
> Thank you!
In Python, when defining the methods of a class, you pass self as an
argument to these methods so that they can have access to the class's
variables and methods.
Example:
class Foo():
self.x = 5
def bar(self):
print self.x
def baz():
print self.x #This raises an error.
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