testjinjatemplate.py

#!/usr/bin/env python
from __future__ import print_function, absolute_import, division
import os
import sys 
from jinja2 import Environment, Template, FileSystemLoader
from jinja2.exceptions import TemplateSyntaxError
from argparse import ArgumentParser
import traceback

def parseargs(argv):
    parser = ArgumentParser()
    parser.add_argument("template", help="path to a jinja2 template file")

    args = parser.parse_args(argv)

    if not os.path.isfile(args.template):
        print ("No such file: %s" % args.template)
        print("USAGE: %s TEMPLATE" % os.path.basename(__file__))
        parser.print_help()
        sys.exit(1)
    return args

def main(templatepath):
    """create a jinja2 environment and attempt to load the templatepath provided"""
    env = Environment(loader=FileSystemLoader(os.path.dirname(templatepath)))
    try:
        tmpl = env.get_template(os.path.basename(templatepath))
        exc_info = sys.exc_info
    except TemplateSyntaxError, E:
        exclass, ex, tb = sys.exc_info()
        lasttb = traceback.extract_tb(tb)[-1]
        print ("TemplateSyntaxError: line %d ('%s')" % (lasttb[1], lasttb[-1]))
        print ("Error: %s" % ex) 

if __name__ == "__main__":
    args = parseargs(sys.argv[1:])
    main(args.template)

"{{ varname" - unclosed print statement - error shows the start of the following line (which is the next character)

[lanky@ultra ansibletests]$ ./testjinjatemplate.py brokentemplate.j2 
TemplateSyntaxError: line 482 ('# Default glance host name or IP (string value)')
Error: unexpected char u'#' at 17711

once that's fixed, try again...
The original 'space in variable name inside print statement' error:

[lanky@ultra ansibletests]$ ./testjinjatemplate.py brokentemplate.j2 
TemplateSyntaxError: line 3070 ('memcached_servers = {{ memcached_ server }}')
Error: expected token 'end of print statement', got 'server'