<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_tools_paths(self):
 """Get tools' paths."""

        if settings.DEBUG or is_testing():
            return list(get_apps_tools().values())

        else:
            tools_root = settings.FLOW_TOOLS_ROOT
            subdirs = next(os.walk(tools_root))[1]

            return [os.path.join(tools_root, sdir) for sdir in subdirs]