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[英]How to make Jinja2 convert all UndefinedError exceptions to blank strings?
[英]Jinja2: HOW-TO render a dict | UndefinedError
我将模板.html存储在变量“ email_html”中,也将一个名为“ info”的字典定义为
info = {'username': u'snip', 'netlink': [u'> F: IL00091 = AMS/VIE/LE-134621 : None : None | O: at-vie01a- : xe-3/1/3 _ et-2/1/21 : nl-ams05a- | W: None : None _ None : None *'], 'end': [2015, 8, 15, 11], 'notes': u'', 'usms': u'ccc', 'start': [2015, 8, 15, 11], 'netelement': [u'> at-vie01a- * x.x.x.x']}
但是当我尝试将info变量加载到模板时:
template = jinja2.Template(open(email_html).read())
html = template.render(**info)
正在收到以下错误:
In [13]: html = template.render(**info)
---------------------------------------------------------------------------
UndefinedError Traceback (most recent call last)
<ipython-input-13-be5c22c9f3c9> in <module>()
----> 1 html = template.render(**info)
/usr/lib/python2.7/site-packages/jinja2/environment.pyc in render(self, *args, **kwargs)
967 except Exception:
968 exc_info = sys.exc_info()
--> 969 return self.environment.handle_exception(exc_info, True)
970
971 def stream(self, *args, **kwargs):
/usr/lib/python2.7/site-packages/jinja2/environment.pyc in handle_exception(self, exc_info, rendered, source_hint)
740 self.exception_handler(traceback)
741 exc_type, exc_value, tb = traceback.standard_exc_info
--> 742 reraise(exc_type, exc_value, tb)
743
744 def join_path(self, template, parent):
<template> in top-level template code()
/usr/lib/python2.7/site-packages/jinja2/environment.pyc in getitem(self, obj, argument)
376 """Get an item or attribute of an object but prefer the item."""
377 try:
--> 378 return obj[argument]
379 except (TypeError, LookupError):
380 if isinstance(argument, string_types):
UndefinedError: 'info' is undefined
这是纯Python(没有Django,没有Flask)。 你能告诉我哪里做错了吗?
您正在将info
字典的键传递给模板。 名称info
本身不适用于模板。
只需在模板中使用{{ username }}
和{{ netlink }}
等。
或者,在渲染时以实际名称传递info
:
html = template.render(info=info)
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