Are you sure that you really need that single-element list?
No I'm not sure, I thought I found a concdition where it made a difference while playing with it, but I don't recall just what circumstance it was?
Don't forget, in Python, all names are references. You only have to be careful when you start re-binding names...
Since more than one name can bind to an object, this would be better.
def getvinfo( vars, v ): names = [] for n in vars.keys(): if vars[n] is v: names.append(n) return names, v, type(v)
a = [2] b = [2] c = b
print getvinfo( locals(), a ) print getvinfo( locals(), b ) print getvinfo( locals(), c )
>>> (['a'], [2], <type 'list'>) (['b', 'c'], [2], <type 'list'>) (['b', 'c'], [2], <type 'list'>) >>>
-- http://mail.python.org/mailman/listinfo/python-list
