Inside a class method, get the object name

Asked Feb 08 '13 at 19:28

Active Feb 08 '13 at 19:28

Viewed 72 times

Let's see my class (look at ????)

class MyInt(object):
    def set_value(_value):
        if type(_value)!=int:
            type_name = type(_value).__name__)
            raise Exception("value of %s cannot be %s" % (????,type_name))
        self.value = _value

And ...

x = MyInt()
x.set_value(1)

that's ok, and ...

x.set_value("A")

I need this response (best description):

value of x cannot be str

How can i get "x" (at ????), or pass variable name as argument (implicit)

tnx

asked Feb 08 '13 at 19:28

Jonathan Isaac

Reason for doing that? Also use `isinstance()` instead of `type()` – Ashwini Chaudhary Feb 08 '13 at 19:32
In future i want to use a dict of error's instead the Exception ;) – Jonathan Isaac Feb 08 '13 at 19:35
I don't think so BrenBarn. (not solve there) – Jonathan Isaac Feb 08 '13 at 19:38
@JonathanIsaac - you are correct that there is no solution in the linked question. The answer, however, correctly states that you cannot retrieve the name bound to a value. – D.Shawley Feb 08 '13 at 19:40
As a side note, this seems to me to be exactly what properties are good for. – mgilson Feb 08 '13 at 19:41
For posterity - if you don't understand why you cannot get the name assigned to a value, read the following http://www.effbot.org/zone/python-objects.htm and http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html#other-languages-have-variables – D.Shawley Feb 08 '13 at 19:50

Inside a class method, get the object name

0 Answers0