AttributeError: __aenter__

[lvzhengri]

"I noticed a problem when I tried to extract structured data using the extract_structured_data_using_css_extractor method in the code, it throws an error. The error occurs at the line async with self._lock or nullcontext(), and the message indicates that the aenter method is not found. The async with statement automatically calls the aenter and aexit methods of the object to enter and exit the asynchronous context manager.

Specifically, the issue might lie with either self._lock or nullcontext(). These objects should support asynchronous context management, but one of them might not have implemented the aenter method, causing the error.

Here is the translation of your text into English:

"This approach from GPT doesn't work.

Solution:

1. Ensure that self._lock is an asynchronous lock: Make sure that the lock you are using in your code is an asynchronous lock object, such as asyncio.Lock. If you are using a synchronous lock (like threading.Lock), it cannot be used in an async with statement.

   import asyncio
   self._lock = asyncio.Lock()  # Use an asynchronous lock

2. Ensure that nullcontext() is imported: If your Python version is 3.6 or lower, nullcontext may not be available. In this case, you can import nullcontext from the contextlib module:

   from contextlib import nullcontext

3. Check your Python version: If you are using Python 3.6 or lower, nullcontext is not supported. In this case, you may consider upgrading Python or using a custom empty context manager:

   class NullContext:
       def __enter__(self): pass
       def __exit__(self, exc_type, exc_value, traceback): pass
   
   # Then use it:
   async with (self._lock if some_condition else NullContext()):
       # your code here

###"

[lvzhengri]

i found answers by myself and cursor.cusor is unbelivable

[unclecode]

@lvzhengri I’m glad to hear you resolved your issue! However, I’m not encountering the same error. Could you let me know if you were running one of the examples from the quickest start file or your own code? If it’s your own code, I’d really appreciate it if you could share a snippet so I can take a closer look.

Currently, we’re using the nullcontext and enter/exit functions, which should work correctly regardless of where the null context is defined. But I’d like to replicate the issue you faced to find a better solution. Looking forward to your code snippet!

[lvzhengri]

"This is indeed an example of the quickstart file I ran. I made some changes to the source code."

[mmioimm]

I had the same problem 3.9.5 Python, solved by modifying async_webcrawler.py

[unclecode]

@lvzhengri plz make a pull request, thx.

[dirkbrnd]

I can confirm we have the same issue on Python 3.9.6, but not on 3.11.5

Any suggestions for workarounds, or waiting on PR?

[unclecode]

@dirkbrnd the PR already merged in 0.4.21, please try