如何解析LaTex文件 [英] How to Parse LaTex file

问题描述

我刚刚写完了Latex中的微积分摘要.

I just finished to write the summary for calculus in Latex.

现在的主要问题是文件包含许多我现在不需要的东西.

The main problem now is that the files contains many things I don't really need now.

.tex文件包含许多我需要认真研究的定义和定理.

The .tex files contains many definitions and theorems that i need to study by heart.

这些定义在tex文件中有其自己的定义，因此文件中的任何定义都将以:

The definitions have their own definition in the tex file, so any definition in the file will start with:

\begin{definition}

以

\end{definition}

定理也一样.

我需要写点东西来取出\begin{}...\end{}内部的任何东西.

I need to write something to take out whatever is inside the \begin{}...\end{}.

例如在名为A的列表中:

For example in a list called A:

\begin{document}

\begin{center}
\begin{definition} Hello WOrld! \end{definition}
\begin{example}A+B \end{example}
\begin{theorem} Tre Capre \end{theorem}
\begin{definition} Hello WOrld2! \end{definition}
\end{center}
\end{document}

应包含:[[\begin{definition} Hello WOrld! \end{definition}],[\begin{theorem} Tre Capre \end{theorem}],[\begin{definition} Hello WOrld2! \end{definition}]]

在这个站点上，我发现我可以使用正则表达式:

Looking in this site i found that i can use Regular Expressions:

for i in range(5):
    x = i+1
    raw = open('tex/chapter' + str(x) + '.tex')
    A = []
    for line in raw:
        A.append(re.match(r'(\begin{definition})://.*\.(\end{definition})$', line))
print(A)

但是输出只是None，我真的不知道为什么

but the output is just None and i don't really know why

import re


for i in range(5):
    x = i+1
    raw = open('tex/chapter' + str(x) + '.tex')
    A = re.findall(r'\\begin{definition}(.*?)\\end{definition}', raw.read())
    print(A)

输出如下:

[]
[]
[]
[]
[]

推荐答案

从我从问题中得到的结果来看，您只需要Latex文件中的定义.您可以使用findall直接获取您的定义:

From what I get from the question you just want the definitions from the Latex file. You can use findall to directly get your definitions:

A = re.findall(r'{definition}(.*?)\\end{definition}', raw.read())

请注意.*?的用法，以解决

Note the usage to .*? in order to tackle the greedy regex matching

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