如何在Jinja2中使用正则表达式?

时间：2021-01-09 20:45:37

I'm new to Jinja2 and so far I've been able to do most of what I want. However, I need to use regular expressions and I can't seem to find anything anywhere in the documentation or on teh Googles.

我是Jinja2的新手，到目前为止，我已经能够做我想做的大部分事情。但是，我需要使用正则表达式，我似乎在文档或google上找不到任何东西。

I'd like to create a macro that mimics the behavior of this in Javascript:

我想创建一个宏来模仿Javascript中的行为:

function myFunc(str) {
    return str.replace(/someregexhere/, '').replace(' ', '_');
}

which will remove characters in a string and then replace spaces with underscores. How can I do this with Jinja2?

它将删除字符串中的字符，然后用下划线替换空格。我怎么用Jinja2呢?

1 个解决方案

#1

30  

There is an already existing filter called replace that you can use if you don't actually need a regular expression. Otherwise, you can register a custom filter:

如果不需要正则表达式，则可以使用一个名为replace的现有过滤器。否则，您可以注册一个自定义过滤器:

{# Replace method #}
{{my_str|replace("some text", "")|replace(" ", "_")}}

 

 

# Custom filter method
def regex_replace(s, find, replace):
    """A non-optimal implementation of a regex filter"""
    return re.sub(find, replace, s)

jinja_environment.filters['regex_replace'] = regex_replace

#1

30  

There is an already existing filter called replace that you can use if you don't actually need a regular expression. Otherwise, you can register a custom filter:

如果不需要正则表达式，则可以使用一个名为replace的现有过滤器。否则，您可以注册一个自定义过滤器:

{# Replace method #}
{{my_str|replace("some text", "")|replace(" ", "_")}}

 

 

# Custom filter method
def regex_replace(s, find, replace):
    """A non-optimal implementation of a regex filter"""
    return re.sub(find, replace, s)

jinja_environment.filters['regex_replace'] = regex_replace
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