def __init__(self, parameter_list, filename):
        self.signature = parameter_list
        self.filename = filename
        self.filters = OrderedDict()
        self.currently_loading = False

        try:
            self.load()
        except IOError:
            pass
Check if user is in the cache
dataset/ETHPy150Open rproepp/spykeviewer/spykeviewer/plugin_framework/filter_manager.py/FilterManager.__init__--crossover with--dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/pysaml2-2.4.0/src/saml2/client.py/Saml2Client.is_logged_in