python - 在 css 文件中查找类并用 python 将它们写入新文件中

Question

我有一个 .css 文件，没有缩进，有一些类定义。我需要提取所有以 .icon 开头的类，例如:

.icon_arrow:before {
    content="/256"
}

并将它们写入一个新文件中。我尝试读取所有行并在 .icon 和 之间写入字符串，如下所示:

infile = open('myfile.css', 'r')
outfile = open('newfile.css', 'w')
copy = False

with infile as css:
    for line in css:
        if line.strip() == ".icon":
            copy = True
        elif line.strip() == '}':
            copy = False
        elif copy:
            outfile.write(line)

但是我得到一个空文件。有什么建议吗？

Answer 1

我认为这可以解决您的问题:

import re

textfile = open('myfile.css', 'r')
filetext = textfile.read()

matches = re.findall("^\.icon.*\n+.*\n+}", filetext, re.MULTILINE)

print(matches)

outfile = open('newfile.css', 'w')

for match in matches:
  outfile.write(match)

我的文件.css

.icon_arrow:before {
    content="/111"
}

.icon_arrow:before {
    content="/222"
}

.icon_arrow:before {
    content="/333"
}

.somethingelse:before {
    content="/444"
}

.somethingelse:before {
    content="/555"
}

print(matches) 将打印:

['.icon_arrow:before {\n    content="/111"\n}', '.icon_arrow:before {\n    content="/222"\n}', '.icon_arrow:before {\n    content="/333"\n}']