'Namespace' object has no attribute 'stop_timeout' in version 2.13.0

[klazuka]

Describe the bug

After upgrading to 2.13.0, we started seeing the following error:

  File "/path/to/app/venv/lib/python3.9/site-packages/locust/env.py", line 84, in __init__
    self.stop_timeout = float(parsed_options.stop_timeout)
AttributeError: 'Namespace' object has no attribute 'stop_timeout'

We are using Locust as a library, and when creating the Locust Environment, we are passing in a Namespace object for parsed_options. In old versions of Locust, we did not need to pass stop_timeout, but now it appears that we do. Is this intentional?

Expected behavior

Existing code should continue to work after a minor version upgrade.

Actual behavior

An AttributeError exception is raised from within Locust.

Steps to reproduce

from argparse import Namespace
from locust.env import Environment
parsed_options = Namespace(timeout=42)
Environment(parsed_options=parsed_options)

^ the above works in 2.12.0 but fails in 2.13.0

Environment

• OS: Linux
• Python version: 3.9.11
• Locust version: 2.13.0
• Locust command line that you ran: n/a
• Locust file contents (anonymized if necessary): n/a

[cyberw]

Dont construct your Environment using a Namespace. Pass arguments explicitly: Environment(stop_timeout=42)

parsed_options should either be None or an object created by argument_parser.parse_args()

[klazuka]

@cyberw thanks, I figured we were doing something wrong. I created a PR to make this more clear.