I'm running files using shell_exec from PHP if that matters. I'm running files in the pyshared folder, no package or subfolders. My problem is that Python wasn't seeing code changes. It's throwing errors that were written before and deleted in the changes made. I finally deleted all the files involved. Python ran them anyway. I rebooted - no help. I looked in the __pycache__ folder and found all but the file called from PHP. The file throwing the error doesn't exist in the pyshared folder and no matching .pyc file exists in the __pycache__ folder. How is Python running a file that isn't in RAM (rebooted), isn't in the pyshared folder and no matching .pyc file exists in the __pycache__ folder? More importantly, how can I make Python stop running files that don't exist anymore? How can I make Python see the changes that I've made to the files?
Python may be storing the old code in memory or cached elsewhere. Try restarting the web server or clearing the cache to see if that helps. You may also want to check if any other instances or processes are running that could be using the old code.
GreenHost: thanks for your response. I did reboot and cleared the __pycache__ folder. It's my server. No other processes could have been running it. I'm not sure what was happening but it's all clear now. Thanks again.
1. Clear Python's Cache: Delete the __pycache__ folder: This folder contains compiled Python bytecode files for faster execution. Removing it forces Python to recompile the scripts when run. Check for other cache directories: Some systems or Python environments might have additional cache locations. Check your Python installation directory and user directories for any other cache or temp folders related to Python. 2. Verify Execution Environment: Check the working directory: Ensure that the PHP script and Python script are in the same directory or that the correct path is provided when using shell_exec. Inspect the Python interpreter: Make sure the Python interpreter used by shell_exec is the expected one. You can verify this by printing the Python version in your Python script. 3. Force Python to Reload Modules: Use importlib.reload: If you're importing the module in your Python script, you can use importlib.reload to force it to reload from the disk: Python import importlib import my_module importlib.reload(my_module) Використовуйте цей код обачно. 4. Consider Environment Variables: Check environment variables: Some Python configurations might rely on environment variables. Verify that they are set correctly and don't point to old locations. 5. Debug the PHP Script: Print the full command: Use echo or var_dump to print the exact command being executed by shell_exec. This can help identify any issues with the command or path. Check for errors: Use error handling in your PHP script to capture any errors that might occur during the execution of the Python script. 6. Test Isolation: Create a new directory: Create a new directory and move your Python files there. This can help isolate the issue and rule out any environment-specific problems. Try a different Python interpreter: Use a different Python installation to see if the problem persists. Additional Considerations: Operating System: Different operating systems might have specific caching mechanisms or behaviors. Python Version: Older Python versions might have different caching implementations. Text Editors: Some text editors might have file locking or caching features that interfere with file access. By following these steps and carefully examining your setup, you should be able to identify and resolve the issue. If you can provide more details about your environment, such as the operating system, Python version, and the exact code snippets involved, I can offer more specific guidance.
Did you try to execute the Python script from the command line to isolate the issue? Ensure the path to the Python file in your PHP script is correct. Before executing the file, print the complete path to verify it. For debugging Add print statements to your Python script to track its execution flow. Implement error handling in your PHP script to catch exceptions. Use Python's logging module to record detailed information about the script's execution. Hope this will work for you.
The situation you're describing sounds like a caching or persistent environment issue where Python might be holding onto old versions of your scripts. Here are some possible reasons and solutions for this behavior: ### Potential Causes 1. **In-Memory Caching by Web Server**: If you're running Python scripts via a web server like Apache or Nginx with PHP, the server might be caching the Python script, leading to the use of outdated versions. 2. **PHP Script Caching**: PHP could be caching the output of your `shell_exec` command. Some caching mechanisms, such as `opcache` in PHP, might be responsible for this. 3. **Persistent Python Processes**: A persistent Python process might be holding onto the old code. This can happen if the script is being run in a long-running process like a daemon or a server worker. ### Solutions 1. **Clear Python Cache:** - Manually delete the `__pycache__` folder, although you've already done this. Ensure there are no hidden `*.pyc` files left in other directories. - Run Python with the `-B` flag to disable the writing of `.pyc` files: ```sh python -B yourscript.py ``` 2. **Clear PHP Cache:** - If using `opcache`, you can clear it using the following PHP command: ```php opcache_reset(); ``` 3. **Ensure Fresh Execution in PHP:** - Make sure PHP's `shell_exec` is executing the correct file and that it is not being cached. You might try temporarily adding a unique string or version to the script you're running to ensure the correct version is being executed. 4. **Restart the Web Server**: If you suspect the web server is caching the script, restarting it might help. 5. **Use Absolute Paths**: Ensure you are using absolute paths in your PHP script to avoid any issues with incorrect files being referenced. 6. **Check for Other Processes**: Check if there are other Python processes running that could be holding onto the old code. You can use tools like `ps aux | grep python` to find and kill any lingering Python processes. 7. **Environment Check**: If you are working in a virtual environment, ensure the environment is properly activated and that you are modifying the correct files. ### Troubleshooting Steps - Add some debug output (e.g., `print` statements or logging) to your Python scripts to verify that the script being run is indeed the one you're editing. - Verify that the command executed by `shell_exec` points to the correct Python interpreter and script. By following these steps, you should be able to identify and resolve the issue of Python running outdated or nonexistent files.
When you delete files in Python, you generally remove their references from the filesystem, making them unavailable for further access. However, if you have a Python script that is still running or a process that is accessing those files, they might still be in use or affect the behavior of the script.