Hi,
I am currently using the Cmd module for a mixed cli+gui application. I
am starting to refactor my code and it would be highly desirable if
many commands could be built as simple plugins.
My idea was:
- Load a list of plugin names (i.e. from the config file, or from the
plugins directory)
- Import all plugins found dynamically:
and this is easy, since I can do, for example:
PLUGIN_NAMES=['foo', 'bar']
PLUGIN_MODULES = map(__import__, PLUGIN_NAMES)
PLUGINS = [item.Commands for item in PLUGIN_MODULES]
Now, what I have to do is to define my command line class. This is
usually done by subclassing cmd.Cmd:
class MyCli(cmd.Cmd):
....
Now I want to add the commands defined in foo.Commands and
bar.Commands. foo.Commands contains the functions corresponding to the
new commands this way:
#foo.py
class Commands
def do_this(self,args):
...
def do_that(self,args):
...
I've seen I can do it by explicitely import them and using multiple
inheritance:
class MyCli(cmd.Cmd , foo.Commands, bar.Commands)
....
so that do_this and do_that are now methods of a Cmd command line.
Now:
- how can I instead have MyCli inherit from a dynamic list of modules?
- is there a better way than using multiple inheritance to plug-in
dynamically commands in a Cmd command line?
I hope it's all clear.
Thanks,
Massimo
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