template class

error

Exception:
NameError("global name 'render' is not defined",)

functions.py

class Template:
	from pystache import render
	from settings import template_dir
	dir = template_dir

	def __init__(self, name, context):
		self.name = name
		self.context = context

	def render(self):
		f = open(self.dir + '/' + self.name + '.html', 'r').read()
		r = render(f, self.context)
		return r

main.py

from functions import Template
t = Template('login', {})
t.render()