python-docx-template的Jinja报错'builtin_function_or_method' object is not iterable

报错如下

File "C:Python27libsite-packagesjinja2environment.py", line 1008, in render
return self.environment.handle_exception(exc_info, True)
File "C:Python27libsite-packagesjinja2environment.py", line 780, in handle_exception
reraise(exc_type, exc_value, tb)
File "<template>", line 1, in top-level template code
TypeError: 'builtin_function_or_method' object is not iterable

排查，模板引用中使用了关键字 values等

{%tc for col in report.threat_score.weeks %}	{{col}}	{%tc endfor %}
{%tc for col in report.threat_score.values %}	{{col}}	{%tc endfor %}

{%tc for col in report.threat_score.values %}