Iterating through a class python

Question

I have a vector class that I need to iterate through. The class contains a list variable. I need to iterate through the class.

Im not sure how I would do this. I need to use __iter__ and its suggested that I use yield, here is the result that I want:

[x*2 for x in Vector([3,3.25,"foo"])]
[6, 6.5, 'foofoo']

Iter should return an object that can iterate over the elements of the vector. How would I go about doing this I never used __iter__ before.

Can i recommend not overwriting the default class object with your parameter name? Not your problem, but probably not helping anybody — en_Knight, Mar 01 '16 at 18:35
Also what is that bitwise or doing on line 5? Nothing good I bet — en_Knight, Mar 01 '16 at 18:35
same with using `|` for a logical or. Python has the keyword `or` — Garrett R, Mar 01 '16 at 18:35
Shouldn't matter here since booleans can evaluate to 0 or 1 anyways. — OneCricketeer, Mar 01 '16 at 18:43
Note that `isinstance(obj,long) or isinstance(obj,int)` can be replaced by : `isinstance(obj, (long, int))`. Also you make `l` a class-variable (line 2), which is bad. — yoch, Mar 01 '16 at 18:58

score 1 · Accepted Answer · answered Mar 01 '16 at 18:56

1

Basically :

def __iter__(self):
    for elt in self.l:
        yield elt

answered Mar 01 '16 at 18:56

yoch

1 Answers1