add guardrails profanity (#12609)

templates/guardrails-output-parser/guardrails_output_parser/chain.py

@@ -0,0 +1,40 @@
+from langchain.llms import OpenAI
+from langchain.output_parsers import GuardrailsOutputParser
+from langchain.prompts import PromptTemplate
+
+# Define rail string
+
+rail_str = """
+<rail version="0.1">
+<output>
+    <string 
+        description="Profanity-free translation" 
+        format="is-profanity-free" 
+        name="translated_statement" 
+        on-fail-is-profanity-free="fix">
+    </string>
+</output>
+<prompt>
+    Translate the given statement into English:
+
+    ${statement_to_be_translated}
+
+    ${gr.complete_json_suffix}
+</prompt>
+</rail>
+"""
+
+
+# Create the GuardrailsOutputParser object from the rail string
+output_parser = GuardrailsOutputParser.from_rail_string(rail_str)
+
+# Define the prompt, model and chain
+prompt = PromptTemplate(
+    template=output_parser.guard.prompt.escape(),
+    input_variables=output_parser.guard.prompt.variable_names,
+)
+
+chain = prompt | OpenAI() | output_parser
+
+# This is needed because GuardrailsOutputParser does not have an inferrable type
+chain = chain.with_types(output_type=dict)