1from __future__ import absolute_import, print_function, unicode_literals 2 3import re 4from .render import renderValue 5from .shared import JSONTemplateError, DeleteMarker, TemplateError, fromNow 6from . import builtins 7 8_context_re = re.compile(r'[a-zA-Z_][a-zA-Z0-9_]*$') 9 10 11def render(template, context): 12 if not all(_context_re.match(c) for c in context): 13 raise TemplateError('top level keys of context must follow ' 14 '/[a-zA-Z_][a-zA-Z0-9_]*/') 15 full_context = {'now': fromNow('0 seconds', None)} 16 full_context.update(builtins.build(full_context)) 17 full_context.update(context) 18 rv = renderValue(template, full_context) 19 if rv is DeleteMarker: 20 return None 21 return rv 22