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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def data_filter(self, data):
 """Return an instance of the Data Filter Class. A simple helper module to filter results from ThreatConnect API or other data source. For example if results need to be filtered by an unsupported field the module allows you to pass the data array/list in and specify one or more filters to get just the results required. Args: data (list):
 The list of dictionary structure to filter. Returns: (object):
 An instance of DataFilter Class """

        try:
            from .tcex_data_filter import DataFilter

            return DataFilter(self, data)
        except ImportError as e:
            warn = u'Required Module is not installed ({}).'.format(e)
            self.log.warning(warn)