advanced patterns when using Python's `with` statement for file handling in multi-threading environment
I need help solving I'm working with an odd scenario when using the `with` statement to handle file operations in a multi-threading context with Python 3.10... I expected that using the `with` statement would ensure proper file closure, but I've noticed that sometimes the file remains locked, and I get an `IOError: [Errno 26] Text file is in use` when trying to access it from another thread. Here’s a simplified example of what I have: ```python import threading class WriteToFile(threading.Thread): def __init__(self, filename, data): super().__init__() self.filename = filename self.data = data def run(self): with open(self.filename, 'a') as file: file.write(self.data + '\n') filename = 'test.txt' threads = [] for i in range(10): thread = WriteToFile(filename, f'Thread {i} writing') threads.append(thread) thread.start() for thread in threads: thread.join() ``` In this code, I’m launching 10 threads that attempt to write to the same file. Occasionally, I see the IOError indicating that the file is in use, which is confusing because I thought the `with` statement would take care of closing the file immediately after the block execution. I also experimented with using `file.flush()` and `os.fsync(file.fileno())`, but that didn't seem to resolve the scenario either. Is there a better way to manage file access in this scenario, or is there something I'm missing in how Python handles file I/O across threads? Any advice would be greatly appreciated! Thanks in advance! I'm using Python latest in this project. Could this be a known issue?