Filter required by Ansible role: https://github.com/StalkingKillah/ansible-flynn

ansible_additional_filters.py

from ansible import errors, runner

def tail(lines, num_lines=1, delimiter='\n'):
	if type(lines) is unicode or type(lines) is str:
		lines = str(lines).split(delimiter)
	# remove empty lines
	lines = remove_empty_elements(lines)
	end = len(lines)
	start = end-num_lines
	return lines[start:end]

def remove_empty_elements(obj):
	obj = filter(lambda e: e != '', obj)
	return obj
	
class FilterModule(object):
	def filters(self):
		return {
			"tail": tail,
			"remove_empty_elements": remove_empty_elements
		}