Veek. M wrote:
I'm writing a price parser. I need to do the equivalent of perl's
$$var to instantiate a class where $car is the class_name.
I'm passing 'Ebay' or 'Newegg' or 'Amazon' via cmd-line. I have a module
named ebay.py and a class called Ebay (price parser). I do something
like:
\> main.py ebay motherboard
and this does:
module = __import__(module_name)
but now i need to instantiate the class - right now I do:
instance = module.Ebay(module_name, product)
how do i replace the 'Ebay' bit with a variable so that I can load any
class via cmd line.
class Load(object):
def __init__(self, module_name, product):
try:
module = __import__(module_name)
instance = module.Ebay(module_name, product)
except ImportError:
print("Can't find module %s" % module_name)
Something like this should do it:
instance = getattr(module, class_name)(module_name, product)
If the class name is always the same as the module name with the
first letter capitalized, you could use
instance = getattr(module, module_name.capitalize())(module_name, product)
--
Greg
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