Plugin initialization randomly fails

This Plugin loading fails randomly and I am not able to establish a pattern why it is failing. Maybe I am doing something fundementally wrong with my plugin code. By any chance, is there something wrong that I doing with my plugin code?

Steps to reproduce the issue

I have a plugin MyPlugin.py as like so:

from SeleniumLibrary import SeleniumLibrary
from SeleniumLibrary.base import keyword
from SeleniumLibrary.keywords.browsermanagement import BrowserManagementKeywords


class MyPlugin(BrowserManagementKeywords):
    def __init__(self, ctx):
        BrowserManagementKeywords.__init__(self, ctx)
        # Some other init things

    @keyword
    def custom_open_browser(self, url: str, alias: str):
        # Do some Custom logic and the open_browser
        return self.open_browser(url=url, alias=alias, browser="chrome")

And this is what my robot scripts looks like:

*** Settings ***
Library           SeleniumLibrary    plugins=${CURDIR}/MyPlugin.py

*** Test Cases ***

Scenario: Custom Open Browser
    # Following Keyword is implemented in MyPlugin.py
    Custom Open Browser    https://example.com/    example

Error messages and additional information

Error in file '/tmp/tmpagw8aw6l/tests/MyTest.robot' on line 2: Initializing library 'SeleniumLibrary' with arguments [ plugins=/tmp/tmpagw8aw6l/tests/MyPlugin.py ] failed: AttributeError: 'NoneType' object has no attribute 'info' 

Traceback (most recent call last): 

File "/usr/local/lib/python3.9/site-packages/SeleniumLibrary/__init__.py", line 484, 
    in __init__ plugin_libs = self._parse_plugins(plugins) 
File "/usr/local/lib/python3.9/site-packages/SeleniumLibrary/__init__.py", line 605, 
    in _parse_plugins plugin = importer.import_class_or_module(parsed_plugin.module) 
File "/usr/local/lib/python3.9/site-packages/robot/utils/importer.py", line 93, 
    in import_class_or_module imported, source = self._import_class_or_module(name_or_path) 
File "/usr/local/lib/python3.9/site-packages/robot/utils/importer.py", line 104, 
    in _import_class_or_module return importer.import_(name) 
File "/usr/local/lib/python3.9/site-packages/robot/utils/importer.py", line 265, 
    in import_ self._remove_wrong_module_from_sys_modules(path) 
File "/usr/local/lib/python3.9/site-packages/robot/utils/importer.py", line 283, 
    in _remove_wrong_module_from_sys_modules self._logger.info("Removed module '%s' from sys.modules to import "

Expected behavior and actual behavior

I expect it to open a browser

Environment

Browser: chrome Browser driver: chromedriver Operating System: Ubuntu 20.04

Libraries: robotframework = “^4.1.1” robotframework-seleniumlibrary = “^6.0.0”

[rasjani]

Didn’t check but one scenario where this can happen is if there are multiple test suites with different parameters - something similar to this can happen. Afaik, RF does not reinit the already existing library and thus stuff like this can happen.

[emanlove]

Also the latest version of the core is 4.1.3. With the dot release of .3 I would probably update that from ending .1 to the latest. I haven’t checked the release notes but those point release are generally bug fixes so useful to try out.