Suppose I have a python object x
and a string s
, how do I set the attribute s
on x
? So:
>>> x = SomeObject()
>>> attr = 'myAttr'
>>> # magic goes here
>>> x.myAttr
'magic'
What's the magic? The goal of this, incidentally, is to cache calls to x.__getattr__()
.
setattr(x, attr, 'magic')
For help on it:
>>> help(setattr)
Help on built-in function setattr in module __builtin__:
setattr(...)
setattr(object, name, value)
Set a named attribute on an object; setattr(x, 'y', v) is equivalent to
``x.y = v''.
Edit: However, you should note (as pointed out in a comment) that you can't do that to a "pure" instance of object
. But it is likely you have a simple subclass of object where it will work fine. I would strongly urge the O.P. to never make instances of object like that.