Attributeerror: module h11 has no attribute event [FIXED]

Are encountering attributeerror: module h11 has no attribute event?

Well, in this article we will look for solutions on how to fix the error as well as examples to provide a better understanding.

Particularly, AttributeError is an exception that is raised when an object does not have the attribute or method that is being called on it.

In other words, Python is telling you that the object you’re working with doesn’t have the functionality that you’re trying to use.

‘h11’ module

The h11 module is a pure-Python implementation of the HTTP/1.1 protocol.

It is designed to be low-level and unopinionated, making it a popular choice for implementing custom HTTP clients and servers.

Meanwhile the ‘Event’ attribute is a class in the ‘h11’ module that represents an HTTP event.

Additionally, HTTP events are the building blocks of HTTP messages. They include information like the HTTP method, headers, and body.

What is attributeerror: module h11 has no attribute event?

The module ‘h11’ has no attribute ‘event’ error is raised when the module ‘h11’ does not have the ‘event’ attribute.

The main reason for this error occurs is that the module doesn’t include the attribute.

Additionally, when you are using an outdated version of the module that doesn’t have the attribute.

Possible causes of error

  • Incorrect Import Statement
    • One common cause of this error is an incorrect import statement. If you have not imported the ‘Event’ attribute from the ‘h11’ module correctly, you will get this error.
  • Version Incompatibility
    • Another cause of this error is version incompatibility. If you are using an old version of the ‘h11’ module that does not have the ‘Event’ attribute, you will get this error.
  • Typo or Misspelling
    • A typo or misspelling in the code can also cause this error. Check your code for any misspelled words or incorrect variable names.

How to fix attributeerror: module h11 has no attribute event

Here are the possible solutions you can use to fix attributeerror: module h11 has no attribute event error.

  1. Check the documentation.

    One of the easiest ways to fix the AttributeError: module ‘h11’ has no attribute ‘event’ error is to check the documentation.

    This is to ensure the event attribute is part of the h11 module in the latest version.

    Make sure to verify the documentation for h11 module.

  2. Reinstall the httpcore in version 0.15

    In addition to solving this error install the httpcore in version 0.15, using the following command:

    pip install –force-reinstall httpcore==0.15

    You can also use the below series of commands to resolve the AttributeError: module ‘h11’ has no attribute ‘event’ error.

    cd stable-diffusion-webui
    source venv/bin/activate
    pip install –force-reinstall httpcore==0.15

  3. Update the ‘h11’ Package

    If you are using an old version of the ‘h11’ module, updating it to the latest version may fix the error.

    You can update the ‘h11’ module using pip, the Python package manager.

    pip install –upgrade h11


In conclusion, in this article we had already explored the “AttributeError: module h11 has no attribute event” error and provided possible solutions for fixing it.

By following these guidelines, you can improve your code’s functionality and avoid common errors when working with h11 module.

We hope that this article has provided you with the information you need to fix this error and continue working with Python.

If you are finding solutions to some errors you’re encountering we also have Attributeerror: numpy.ndarray object has no attribute values.

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