Fix flake8 lint issues and update tox config to exclude virtualenv and build dirs

Signed-off-by: Bilgin Ibryam <bibryam@gmail.com>

quickstarts/09-third-party-tool-call/agent_with_crewai_tool.py

@@ -36,7 +36,7 @@ async def main():
     # Create a dapr agent with both tools - CrewAI wrapped tool and native tool
     agent = Agent(
         """You are a helpful assistant that can read files and analyze text.
-        The ReadFile tool is already configured to read from a specific sample file, 
+        The ReadFile tool is already configured to read from a specific sample file,
         so you can just use it without arguments.
         After getting the content, you can use the CountWords tool to analyze the text statistics.""",
         tools=[file_tool, count_words],

quickstarts/09-third-party-tool-call/agent_with_langchain_tool.py

@@ -6,9 +6,8 @@ from dotenv import load_dotenv
 from langchain_community.tools import DuckDuckGoSearchRun
 
 from dapr_agents.agent import Agent
-from dapr_agents.tool import LangchainTool, tool
-from dapr_agents.tool.third_party import LangchainTool
 from dapr_agents.tool import tool
+from dapr_agents.tool.third_party import LangchainTool
 from pydantic import BaseModel, Field
 
 load_dotenv()

tox.ini

@@ -12,7 +12,8 @@ basepython = python3
 usedevelop = False
 deps = flake8
 commands =
-    flake8 . --ignore=E501,F401,W503,E203
+    flake8 . --ignore=E501,F401,W503,E203 --exclude=.git,__pycache__,.venv,build,dist,.tox
+
 
 [testenv:ruff]
 basepython = python3