def search_python(python_code, template_name):
    """
    Searches Python code for a template name.
    Returns a list of tuples, each one being:
     (filename, line number)
    """
    retval = []
    for fn, content in python_code:
        for ln, line in enumerate(content):
            if ((u'"%s"' % template_name) in line) or \
               ((u"'%s'" % template_name) in line):
                retval.append((fn, ln + 1))
    return retval