Derivative of string as a name of list or dictionary (or class?)

[John Hunter]

>>>>> "Roman" == Roman Tarantowicz <rtaranto at interia.pl> writes:

    Roman> I received string1, string2, ... etc from handle_data in
    Roman> MyParser(SGMLParser)

    Roman> I dont know how to create list or dictionary which name be
    Roman> derivative of the received string?

    Roman> I would like to have the following containers:

    Roman> Top_Category = [derivative_of_string1,
    Roman> derivative_of_string2, ...]

    Roman> Derivative _of_string1 = [derivative_of_another_string1,
    Roman> derivative_of_another_string2, ...]

    Roman> Derivative_of_another_string1 = {'id1': 'str1', 'id2' :
    Roman> 'str2', ...}

    Roman> Is this any direct method or I have to apply something
    Roman> complicated as a Factory Pattern (is it possible to
    Roman> automate producing new classes which names will be given
    Roman> during execution of program)?  Any tips or direction in
    Roman> which my mind should be pushed I'll embrace wholeheartedly
    Roman> ;)

If you want to set attributes of a class you can use setattr and name
the attributes with a string, as in

class SomeClass:
    pass

name = 'seq'
val = ['John', 'Hunter', 'was', 'here']

x = SomeClass()
setattr(x, name, val)

print x.seq
#or
print getattr(x,name)

If you want to set variable names in the global namespace, I am
reasonably sure you can do a similar thing by manipulating a global
object, but I don't know what it is.  You can always use exec, but you
will probably have people frown at you

name = 'seq'
val = ['John', 'Hunter', 'was', 'here']
exec('%s=val' % name)
print seq

But I would hold out to see if a better solution exists.

John Hunter