Templates (#12294)

Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>
Co-authored-by: Lance Martin <lance@langchain.dev>
Co-authored-by: Jacob Lee <jacoblee93@gmail.com>

templates/anthropic-iterative-search/anthropic_iterative_search/output_parser.py

@@ -0,0 +1,31 @@
+from langchain.schema.agent import AgentAction, AgentFinish
+import re
+
+from .agent_scratchpad import _format_docs
+
+
+def extract_between_tags(tag: str, string: str, strip: bool = True) -> str:
+    ext_list = re.findall(f"<{tag}\s?>(.+?)</{tag}\s?>", string, re.DOTALL)
+    if strip:
+        ext_list = [e.strip() for e in ext_list]
+    if ext_list:
+        if len(ext_list) != 1:
+            raise ValueError
+        # Only return the first one
+        return ext_list[0]
+
+def parse_output(outputs):
+    partial_completion = outputs["partial_completion"]
+    steps = outputs["intermediate_steps"]
+    search_query = extract_between_tags('search_query', partial_completion + '</search_query>') 
+    if search_query is None:
+        docs = []
+        str_output = ""
+        for action, observation in steps:
+            docs.extend(observation)
+            str_output += action.log
+            str_output += '</search_query>' + _format_docs(observation)
+        str_output += partial_completion
+        return AgentFinish({"docs": docs, "output": str_output}, log=partial_completion)
+    else:
+        return AgentAction(tool="search", tool_input=search_query, log=partial_completion)