[EMAIL PROTECTED] a écrit :
Reading the language tututorial would help you a lot :(

=== what is the difference between pc and pc()?

pc = getToolByName(....) - returnes a refference to a method

Nope.

pc is a refference to a method,

Nope.

pc is not 'a reference to a method', it's a callable object (in this case a ZCatalog instance...)....

> pc() is a method invocation.

In this case, it happens to be a call to a method of ZCatalog, but it could have been a call to a named or anonymous function as well...

<op>
In Python, functions and methods are objects too, so you can use them like any other object :


def fun():
  print "hello world"

machin = fun
machin()
>> hello world

But objects can be used like functions too, if they define a __call__ method:

class fakeFun(object):
  def __init__(self, name):
    self.name = name
  def __call__(self):
     return "hello, I'm %s" % self.name

f= fakeFun('foo')
f()
>> hello, I'm foo
</op>

HTH
Bruno
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