Smart factory class

[kramer31]

Can anyone tell me if there is a way in python that I can implement a
factory function which takes as input a string ClassName and returns
an object of type ClassName?

 

[Arnaud Delobelle]

Can anyone tell me if there is a way in python that I can implement a
factory function which takes as input a string ClassName and returns
an object of type ClassName?

def mkobj(classname, ns=globals()): return ns[classname]() ...
class A: pass ...
mkobj('A')

But why do you want to do this?

 

[Gabriel Genellina]

Can anyone tell me if there is a way in python that I can implement a
factory function which takes as input a string ClassName and returns
an object of type ClassName?

def InstanceFactory(classname):
cls = globals()[classname]
return cls()

If the class resides in a different module:

def InstanceFactory(modulename, classname):
if '.' in modulename:
raise ValueError, "can't handle dotted modules yet"
mod = __import__(modulename)
cls = getattr(mod, classname]
return cls()

I suppose you get the names from a configuration file or something -
usually it's better to just pass the class instead of the class name.