When attempting to run `ryu-manager --version` after installing Ryu in a virtual environment, the following ImportError occurs: ImportError: cannot

[engrabdinasir]

Ryu Bug Report

Issue Description:

When attempting to run ryu-manager --version after installing Ryu in a virtual environment, the following ImportError occurs:

ImportError: cannot

import name 'ALREADY_HANDLED' from 'eventlet.wsgi' (/path/to/eventlet/wsgi.py)

### Steps to Reproduce:

1. Create a virtual environment:

   
   python3 -m venv my_ryu_env
   

2. Activate the virtual environment:

   
   source my_ryu_env/bin/activate
   

3. Install Ryu and eventlet:

      pip install ryu eventlet==0.30.2
   

4. Attempt to run `ryu-manager --version`:

   ```bash
   ryu-manager --version

Expected Behavior:

The ryu-manager --version command should display the Ryu version without any ImportError.

Actual Behavior:

The ImportError occurs, preventing the successful execution of the command.

Environment:

• Ryu Version: 4.34
• Python Version: 3.10.12
  Operating System: ubunto 20.04 lte
• Virtual Environment: Yes

Dependencies:

• eventlet==0.30.2

Additional Information:

• The issue persists even after downgrading eventlet to version 0.30.2.
• Full traceback and error message are provided in the Steps to Reproduce.

Attempts to Resolve:

1. Tried different versions of eventlet (0.33.3 and 0.30.2).
2. Checked community forums for similar issues (provide links).

Reproducibility:

The issue is consistently reproducible.

[badcodebuilder]

This error has been mentioned in #166