Python assignment loop

[Silver Rock]

i need to do something like this:

###
import wx
x=number
for i in range(500):
   "var"+str(i)=ClassXYZ(...,x+i,...)

#.... code
y=number
for i in range(y):
   ClassAAAA(object_called_by_the_string("var"+str(i)),...)

###
i can't figure out how to do this, and could not find it on the web.
c.