如何从字符串中删除“＃”注释？ [英] How to remove '#' comments from a string?

问题描述

问题：
实现一个名为stripComments（code）的Python函数，其中code是一个参数，该参数采用包含Python代码的字符串。函数stripComments（）返回删除了所有注释的代码。

The problem: Implement a Python function called stripComments(code) where code is a parameter that takes a string containing the Python code. The function stripComments() returns the code with all comments removed.

我有：

def stripComments(code):
   code = str(code)
   for line in code:
       comments = [word[1:] for word in code.split() if word[0] == '#']
       del(comments)
stripComments(code)

我不确定如何具体告诉python在字符串的每一行中进行搜索以及何时找到井号标签，以删除该行的其余部分。
请帮助。 ：（

I'm not sure how to specifically tell python to search through each line of the string and when it finds a hashtag, to delete the rest of the line. Please help. :(

推荐答案

您可以通过 re.sub 函数实现此目的。

You could achieve this through re.sub function.

import re
def stripComments(code):
    code = str(code)
    return re.sub(r'(?m)^ *#.*\n?', '', code)

print(stripComments("""#foo bar
bar foo
# buz"""))

（？m ）启用多行模式。 ^ 断言我们才是开始。< space> *＃开头匹配字符＃，。* 匹配以下所有字符除了换行符外，用空字符串替换那些匹配的字符将为您提供删除注释行的字符串。

(?m) enables the multiline mode. ^ asserts that we are at the start. <space>*# matches the character # at the start with or without preceding spaces. .* matches all the following characters except line breaks. Replacing those matched characters with empty string will give you the string with comment lines deleted.

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