Python __subclasses__() not listing subclasses
- by Mridang Agarwalla
I cant seem to list all derived classes using the __subclasses__() method. Here's my directory layout:
import.py
backends
__init__.py
--digger
__init__.py
base.py
test.py
--plugins
plugina_plugin.py
From import.py i'm calling test.py. test.py in turn iterates over all the files in the plugins directory and loads all of them. test.py looks like this:
import os
import sys
import re
sys.path.append(os.path.join(os.path.abspath(os.path.dirname(os.path.abspath( __file__ )))))
sys.path.append(os.path.join(os.path.abspath(os.path.dirname(os.path.abspath( __file__ ))), 'plugins'))
from base import BasePlugin
class TestImport:
def __init__(self):
print 'heeeeello'
PLUGIN_DIRECTORY = os.path.join(os.path.abspath(os.path.dirname(os.path.abspath( __file__ ))), 'plugins')
for filename in os.listdir (PLUGIN_DIRECTORY):
# Ignore subfolders
if os.path.isdir (os.path.join(PLUGIN_DIRECTORY, filename)):
continue
else:
if re.match(r".*?_plugin\.py$", filename):
print ('Initialising plugin : ' + filename)
__import__(re.sub(r".py", r"", filename))
print ('Plugin system initialized')
print BasePlugin.__subclasses__()
The problem us that the __subclasses__() method doesn't show any derived classes. All plugins in the plugins directory derive from a base class in the base.py file.
base.py looks like this:
class BasePlugin(object):
"""
Base
"""
def __init__(self):
pass
plugina_plugin.py looks like this:
from base import BasePlugin
class PluginA(BasePlugin):
"""
Plugin A
"""
def __init__(self):
pass
Could anyone help me out with this? Whatm am i doing wrong? I've racked my brains over this but I cant seem to figure it out
Thanks.
