re************* ***@gmail.com wrote:
Is it possible to load and use "modules" containing plug-in code
written by third party developers into a running instance of the
framework? How would I do this? Do I need to "dynamicall y load" the
module at runtime? (I will scan a folder in the application direcotry
for XML files containing information about the plug-ins, including the
modules that implement them.)
a simple approach is to do something like
for file in list_of_plugins :
ns = {}
execfile(file, ns)
# pick up interesting objects from the namespace dictionary
# e.g.
callback = ns["callback"]
where individual plugins might look something like
# my plugin
def callback(event) :
pass # do something here
You can prepopulate the namespace to make application-specific
objects available for the plugins:
context = MyContext()
for file in list_of_plugins :
ns = dict(context=co ntext)
execfile(file, ns)
which allows the plugins to do e.g.
# my plugin
def callback(event) :
pass
context.registe r(callback)
or you can use a plugin initialization function:
context = MyContext()
for file in list_of_plugins :
ns = {}
execfile(file, ns)
setup = ns["setup"]
setup(context)
where the plugins look like:
def callback(event) :
pass
def setup(context):
context.registe r(callback)
and so on. To learn more about this, look up exec/execfile and
__import__ in the library reference.
</F>
