Update app.py

app.py

@@ -3,7 +3,6 @@ import os
 import matplotlib.pyplot as plt
 import pandas as pd
 from langgraph.graph import StateGraph
-from langgraph_core.state import MessagesState
 from langchain_core.messages import HumanMessage, AIMessage
 from langchain_anthropic import ChatAnthropic
 import warnings
@@ -21,17 +20,11 @@ api_key = os.getenv("ANTHROPIC_API_KEY")
 if not api_key:
     raise ValueError("ANTHROPIC_API_KEY environment variable not set")
 
-# Load Claude 3.5 Sonnet model
-# Using a direct approach to avoid proxies issue
-try:
-    # Explicitly create with minimal parameters
-    llm = ChatAnthropic(api_key=api_key, model="claude-3-5-sonnet-20240229")
-except Exception as e:
-    print(f"Error initializing ChatAnthropic: {e}")
-    # Fallback initialization if needed
-    import anthropic
-    client = anthropic.Anthropic(api_key=api_key)
-    llm = ChatAnthropic(client=client, model="claude-3-5-sonnet-20240229")
+# Load Claude 3.5 Sonnet model with explicit minimal parameters to avoid 'proxies' issue
+llm = ChatAnthropic(
+    api_key=api_key,
+    model="claude-3-5-sonnet-20240229"
+)
 
 # System prompt constructor
 def make_system_prompt(suffix: str) -> str: