Update app.py

app.py

@@ -9,6 +9,12 @@ from langchain.memory import ConversationBufferMemory as MEM,RedisChatMessageHis
 from langchain.schema import SystemMessage as SM,HumanMessage as HM, AIMessage as AM
 from langchain import hub
 import os
+import os
+import pprint
+
+os.environ["SERPER_API_KEY"] = ""
+from langchain_community.utilities import GoogleSerperAPIWrapper
+search = GoogleSerperAPIWrapper()
 from langchain_core.prompts.chat import ChatPromptTemplate, MessagesPlaceholder
 system = '''Respond to the human as helpfully and accurately as possible. You have access to the following tools: