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processors.py

@@ -1,4 +1,6 @@
+import json
 import re
+from typing import Any
 
 from .operator import BaseFieldOperator
 
@@ -14,10 +16,45 @@ class RegexParser(BaseFieldOperator):
     """
 
     regex: str
+    termination_regex: str = None
 
     def process(self, text):
+        if self.termination_regex is not None and re.fullmatch(self.termination_regex, text):
+            return []
         matches = re.findall(self.regex, text)
         return matches
 
 
+class LoadJson(BaseFieldOperator):
+    def process(self, text):
+        try:
+            return json.loads(text)
+        except json.JSONDecodeError:
+            return []
+
+
+class ListToEmptyEntitiesTuples(BaseFieldOperator):
+    def process(self, lst):
+        try:
+            return [(str(item), "") for item in lst]
+        except json.JSONDecodeError:
+            return []
+
+
+class DictOfListsToPairs(BaseFieldOperator):
+    position_key_before_value: bool = True
+
+    def process(self, obj):
+        try:
+            result = []
+            for key, values in obj.items():
+                for value in values:
+                    assert isinstance(value, str)
+                    pair = (key, value) if self.position_key_before_value else (value, key)
+                    result.append(pair)
+            return result
+        except:
+            return []
+
+
 # add_to_catalog(ToString('prediction'), 'processors', 'to_string')