tracker.py 文件源码

def read(self, *fields, **conditionals):
        """
        Pull raw data into a dataframe. If no conditions are passed, pull the whole table.
        Otherwise, filter based on the conditions specified ( currently only equality ).
        """

        # Parse the list of fields to return
        field_query = self._parse_fields(*fields)

        # Parse the conditions
        conditionals_query = self._parse_conditionals(**conditionals)

        query = "SELECT {} FROM {} {}".format(field_query, self.table, conditionals_query)

        if "DISTINCT" not in query:
            query += " ORDER BY {}".format(self.timestamp_field)

        return pd.read_sql(query, self.db)