def extend_pyflow_docstring(docstring):
	"""
	Updates a doc string to include the usage instructions for default pyflow parameters
	"""
	default_docstring = """
	Pyflow arguments:
	Optional arguments:
		--run_mode   Valid options: (Default) 'local', 'sge'
		--nCores     Number of threads to use (Default: 1)
		--memMb      memory available in local mode in MB
		--mailTo     Email address to send updates on pipeline running progress.
		--pyflow_dir     Directory to store pyflow tracking data.
		--dry       Set this flag to run in dry mode (does not launch tasks).
		--isContinue    Modify the continuation method of pyflow. Default: auto
		--forceContinue    If isContinue is set, allows task definitions to change.
		--startFromTasks    A comma-delimited list of task labels as strings. Any tasks which are not in this set or descendants of this set will be marked as completed.
		--ignoreTasksAfter  A comma-delimited list of task labels as strings. All descendants of these task labels will be ignored.
		--resetTasks    A comma-delimited list of task labels as strings. These tasks and all of their descendants will be reset to the "waiting" state to be re-run. Note this option will only effect a workflow which has been continued from a previous run. This will not overide any nodes alterned by the startFromTasks setting in the case that both options are used together
		--schedulerArgList A list of additional Parameters related to scheduler
	"""
	return docstring + default_docstring