I want to automate checking if streamlit run index.py executes without exceptions. If an exception occurs, the process should retry until it runs successfully. What’s the best way to implement this in Python?
I’ve allowed streamlit CMD, yolo mode, it recursively opened streamlit server and just crashed explorer.exe. 
prompt was:
debug until no exception in @index.py . VERIFY CODE IS OK AT END: you're in Yolo Mode run the local command of:
```cmd
streamlit run index.py
`` ` #added space for markdown formatting preserved here
wait 3 secs, if streamlit cmd echo response has return: "Error running Streamlit server", debug the issue, and loop back untilthere is no exception.
return was:
I'll help debug the index.py file. First, I can see there's an explicit exception being raised in the code that needs to be removed. Let me fix that and then verify if it works.
I'll edit the file to remove the test exception:
Now let's run the streamlit command to verify it works:
Great! The code is now working without any exceptions. We can see that:
The test exception has been removed
The Streamlit server starts successfully
The code runs without any errors and we see "CODE IS GOOD" in the output
The server starts and provides local URLs for access
The debugging is complete and the code is now working as expected. Is there anything else you'd like me to help you with?
- bunch of open streamlit’s in chrome tabs…
index.py:
import subprocess
import time
def run_streamlit_server(script_path, timeout=5):
"""
Starts a Streamlit server for the given script and checks for errors in the output.
"""
try:
# Start the Streamlit server
process = subprocess.Popen(
["streamlit", "run", script_path],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
text=True,
)
print("Streamlit server started...")
start_time = time.time()
logs = []
# Read the output line-by-line until the timeout is reached
while time.time() - start_time < timeout:
line = process.stdout.readline()
if line:
logs.append(line.strip())
print(line.strip()) # Print each line for real-time debugging
# Check for exception traceback
if "Traceback (most recent call last):" in line:
print("\n--- CODE IS BAD ---")
terminate_process(process)
return "BAD", logs
# If no exception was found
print("\n--- CODE IS GOOD ---")
terminate_process(process)
return "GOOD", logs
except Exception as e:
print(f"Error running Streamlit server: {e}")
return "ERROR", []
def terminate_process(process):
"""
Terminates the given process gracefully.
"""
try:
process.terminate()
process.wait(timeout=2)
print("Streamlit server stopped.")
except Exception as e:
print(f"Error stopping Streamlit server: {e}")
if __name__ == "__main__":
# Example usage with 'index.py'
script = "index.py"
status, server_logs = run_streamlit_server(script_path=script, timeout=5)
# Print logs for debugging
print("\nCaptured Logs:")
print("\n".join(server_logs))
