Question

我有一个类，它采用任意HTML模板，str.format()用于特定用例。例如：

<h1>Hi, {userName}!</h1>
<p> It's {weather} today.</p>

会变成：

<h1>Hi, Jon Skeet!</h1>
<p>It's sunny today.</p>

要做到这一点，我有一个Template类：

class Template:
    def __init__(self, name, **kwargs):
        templateDirectory = getTemplateDirectory()  # we don't need to worry about this
        with open(os.path.join(templateDirectory, "templates", name + ".html")) as templateFile:  # we get the template we need
            self.template = templateFile.read()

        print(self.template)  # all in order: we get the un-formatted HTML 
        print(kwargs)  # all in order: we get a dict of things to replace (i.e. {'userName': 'Jon Skeet', 'weather': 'sunny'} )

        self.final = self.template.format(**kwargs)  # this should just replace things nicely, but it doesn't: why?

    def __str__(self):
        return self.final

我实例化如下：

ErrorTemplate = Template('foo', var1=42, var2='foo')
print(str(ErrorTemplate))

我得到的错误如下：

Traceback (most recent call last):
  File "/path/to/file.py", line 11, in <module>
    ErrorTemplate = Template('foo', var1=42, var2='bar')
  File "/path/to/the/file/with/Template/class.py", line 10, in __init__
    self.final = self.template.format(**kwargs)
KeyError: 'document'

我没有使用＆＃39;文件＆＃39;任何地方。我不知道它到底在哪里＆＃39;记录＆＃39;从。我做错了什么？

格式化HTML时异常的KeyError

0 个答案: