Mensanator wrote:
On Mar 26, 11:42 am, "andrew cooke" <and...@acooke.org> wrote:
...
that's cute, but if you show them 2.6 or 3 it's even cuter:
from operator import add
class Vector(list):
... def __add__(self, other):
... return map(add, self, other)
...>>> x = Vector([1,2])
x+x
[2, 4]
What would you have to do to make this work?
x+x+x # expecting [3,6]
[2, 4, 1, 2]
class Vector(list):
def __add__(self, other):
return type(self)(x + y for x, y in zip(self, other))
def __sub__(self, other):
return type(self)(x - y for x, y in zip(self, other))
def __repr__(self):
return '%s(%s)' % (
type(self).__name__, list.__repr__(self))
x = Vector([1,2])
x + x + x
--Scott David Daniels
scott.dani...@acm.org
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