Global scope and accessing

app_name = 'Teste'
app_path = '/home/mauro'

class Common(object):
    def __init__(self, path=None):
        self.app_path = path and path or app_path

    @property
    def _path_(self):
        return self.app_path

    @staticmethod
    def reset_path():
        common.app_path = app_path

class Nova(object):
    def path(self):
        print common._path_

if __name__ == '__main__':
    common = Common(path='/home/jorge')
    nova = Nova()
    nova.path()
    print app_path
    a = raw_input('Resetando a _path_ da common')
    Common.reset_path()
    print common._path_
    nova.path()