Various little fixes

Fixed:
Missing import os and from openai import OpenAI for the Perplexity API calls
Missing Perplex_Assistant_Prompt variable
Syntax error in the tools parameter of CodeAgent (incorrect list format)
Improper formatting of tool arguments in the agent tools list

app.py

@@ -1,12 +1,17 @@
-from smolagents import CodeAgent,DuckDuckGoSearchTool, HfApiModel,load_tool,tool
+from smolagents import CodeAgent, DuckDuckGoSearchTool, HfApiModel, load_tool, tool
 import datetime
 import requests
 import pytz
 import yaml
+import os
+from openai import OpenAI
 from tools.final_answer import FinalAnswerTool
 
 from Gradio_UI import GradioUI
 
+# Define the Perplexity system prompt
+Perplex_Assistant_Prompt = """You are a helpful AI assistant that searches the web for accurate information."""
+
 #@weave.op()
 def tracked_perplexity_call(prompt: str, system_messages: str, model_name: str = "sonar-pro", assistant_meta: bool = False):
     """Enhanced Perplexity API call with explicit model tracking."""
@@ -27,8 +32,7 @@ def tracked_perplexity_call(prompt: str, system_messages: str, model_name: str =
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def Sonar_Web_Search_Tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
-    #Keep this format for the description / args / args description but feel free to modify the tool
+def Sonar_Web_Search_Tool(arg1: str, arg2: str) -> str:
     """A tool that accesses Perplexity Sonar to search the web when the answer requires or would benefit from a real world web reference. 
     Args:
         arg1: User Prompt
@@ -63,10 +67,10 @@ final_answer = FinalAnswerTool()
 # model_id='https://pflgm2locj2t89co.us-east-1.aws.endpoints.huggingface.cloud' 
 
 model = HfApiModel(
-max_tokens=2096,
-temperature=0.5,
-model_id='Qwen/Qwen2.5-Coder-32B-Instruct',# it is possible that this model may be overloaded
-custom_role_conversions=None,
+    max_tokens=2096,
+    temperature=0.5,
+    model_id='Qwen/Qwen2.5-Coder-32B-Instruct',  # it is possible that this model may be overloaded
+    custom_role_conversions=None,
 )
 
 
@@ -78,7 +82,7 @@ with open("prompts.yaml", 'r') as stream:
     
 agent = CodeAgent(
     model=model,
-    tools=[final_answer], [Sonar_Web_Search_Tool], ## add your tools here (don't remove final answer)
+    tools=[final_answer, Sonar_Web_Search_Tool, get_current_time_in_timezone, image_generation_tool],  # Fixed list formatting
     max_steps=6,
     verbosity_level=1,
     grammar=None,
@@ -88,5 +92,4 @@ agent = CodeAgent(
     prompt_templates=prompt_templates
 )
 
-
 GradioUI(agent).launch()