import imp

plugin_dirs = [".", "plugins"]

def load_plugin(name):
    fd, path, desc = imp.find_module(name, plugin_dirs)
    try:
        return imp.load_module(name, fd, path, desc)
    finally:
        if fd: fd.close()

try:
    plugin = load_plugin("plugin")
    obj = plugin.create()
    obj.bar()
except ImportError:
    print "No plugin"