jinja-render.py

#!/usr/bin/env python

import sys
import json
import jinja2

templateLoader = jinja2.FileSystemLoader( searchpath="./" )
templateEnv = jinja2.Environment( loader=templateLoader )

template_file = sys.argv[1]
data_file = sys.argv[2] ## .json file
output_file = template_file+'.html'

template = templateEnv.get_template( template_file )

with open( data_file, 'r' ) as json_data:
    data = json.load( json_data )

rendered = template.render( data )

with open( output_file, 'w' ) as op:
    op.write( rendered )