Template engine that knows how to render {{ tag }}

minijinja.py

# minijinja is in public domain

class MiniJinja(object):
    """ Template engine that knows how to render {{ tag }} """
    
    def __init__(self, templates='.'):
        """templates  - template path"""
        import re 
        import sys
        self.PY3K = sys.version_info[0] == 3

        self.path = templates + '/'
        self.tag  = re.compile('{{ *(?P<tag>\w+) *}}')

    def render(self, template, vardict=None, **kwargs):
        """returns unicode str"""
        data = vardict or {}
        data.update(kwargs)

        def lookup(match):
            return data[match.group('tag')]

        tpl = open(self.path + template).read()
        if not self.PY3K:
            return unicode(self.tag.sub(lookup, tpl))
        else:
            return self.tag.sub(lookup, tpl)

if __name__ == '__main__':
    jinjer = MiniJinja('templates')
    d = dict(body='Hello, World!')
    jinjer.render('index.tpl', d)