I'd like to do something like the following:
a = 1; b = 2; c = None mylist = [a, b, c] for my in mylist: if my is None: print 'you have a problem with %s' % my #this line is problematic
You have a problem with None
What I want to see in the output is:You have a problem with c
How do I convert a variable name into a string?
You cannot. In the above example, when you hit the None item in the list, there is only one None object in existence, and three different names "bound" to it: c, my, and the third spot in the list. (Think of this "bound" thing as being like strings attaching a variety of names to the item itself.)
Given the object "None" then, how can Python know which of the names you intended? More to the point, by the time you've finished creating the list mylist, the connection to "c" is long gone. It is exactly as though you had typed this instead: mylist = [1, 2, None]
There are doubtless other ways to accomplish what you are really trying to do (display some sort of information for debugging purposes?), but with a contrived example it's a little hard to pick the best...
By the way, this sort of thing should be well
covered by the FAQ entries, if you read them.
See, for example, http://www.python.org/doc/faq/programming.html#how-can-my-code-discover-the-name-of-an-object
-Peter -- http://mail.python.org/mailman/listinfo/python-list
