Python 在某些事件发生后查找文本

我有一个文件，里面有一些大写的关键字。在大写文本之后，可以有更多的文本，但每次都有以“Test:”开头的部分。 我应该在“Test:”之后开始此文本，直到出现两个换行符（\n\n）

例如：

ESC
Here can be something.
Test: Here is the definition.

Here can also be some text.

TAB
Here can be something.
Test: Here is the definition.
There can be some more lines. 

Here can also be some text.

所以，如果我搜索“TAB”，我想打印出“这是定义。\n可能还有更多行。”我该怎么做

谢谢你的帮助！：）

编辑： 现在，我搜索等于“TAB”的行。也就是说，我有行号，但如何继续

导入系统

s="""ESC
Here can be something.
Defn: Here is the definition.

Here can also be some text.

TAB
Here can be something.
Defn: Here is the definition.
There can be some more lines.

Here can also be some text."""


if __name__ == '__main__':
    # search =  sys.argv[1]
    search = 'TAB' #Sample search
    index = s.find(search) # Find the index of search term
    def_index = s.find('Defn', index) # Find the index of 'Defn' 
    end_index =  s.find('\n\n', def_index) # Find the end of definition 
    print index , def_index, end_index
    print s[def_index: end_index][5:]  # 5 is len('Defn:')

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