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validate.py

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+from .text_utils import split_words
+from .stream import StreamInstanceOperator, InstanceOperatorWithGlobalAccess, Artifact
+
+from datasets import Value, Features, Dataset, Sequence
+
+from dataclasses import field
+from typing import Dict, Any
+from abc import ABC, abstractmethod
+
+
+class Validator(ABC):
+    pass
+
+
+class ValidateSchema(Validator, StreamInstanceOperator):
+    schema: Features = None
+
+    def verify(self):
+        assert isinstance(self.schema, Features), "Schema must be an instance of Features"
+        assert self.schema is not None, "Schema must be specified"
+
+    def verify_first_instance(self, instance):
+        for field in self.standart_fields:
+            assert field in instance, f'Field "{field}" is missing in the first instance'
+
+    def process(self, instance: Dict[str, Any], stream_name: str = None) -> Dict[str, Any]:
+        return instance
+
+
+class StandardSchema(Features):
+    def __init__(self):
+        super().__init__(
+            {
+                "source": Value("string"),
+                "target": Value("string"),
+                "references": Sequence(Value("string")),
+                "metrics": Sequence(Value("string")),
+                "parser": Value("string"),
+                # 'group': Value('string'),
+                # 'guidance': Value('string'),
+            }
+        )
+
+
+class ValidateStandartSchema:
+    schema: Features = field(default_factory=StandardSchema)