added getitem to phenextable. all tests now run

Author: a-hartens

phenex/filters/categorical_filter.py

@@ -30,7 +30,7 @@ def __init__(
         self.domain = domain
         super(CategoricalFilter, self).__init__()
 
-    def _filter(self, table: 'PhenexTable', tables:dict):
+    def _filter(self, table: 'PhenexTable', tables:dict = None):
         if self.column_name not in table.columns:
             if self.domain not in tables.keys():
                 raise ValueError(f"Table required for categorical filter ({self.domain}) does not exist within domains dicitonary")

phenex/tables.py

@@ -60,6 +60,9 @@ def __getattr__(self, name):
         # pass all attributes on to underlying table
         return getattr(self._table, name)
 
+    def __getitem__(self, key):
+        return self._table[key]
+
     @property
     def REQUIRED_FIELDS(self):
         return list(self.DEFAULT_MAPPING.keys())