Python：着色正则表达式匹配 [英] python: coloring regex matches

问题描述

我有一个简单的python脚本，在其中逐行读取文件：

I have a simple python script, where I read file line by line:

while True:
   line = f.readline()
   if line:
      print line,
   else:
      time.sleep(0.1)

这些行除其他外包含 [IP地址] 和< email地址> 放在 [] 和<> 中。

The lines contain, among other things, [IP addresses] and <email addresses> enclosed in [] and <>.

我想正常打印整行，但是括号内的文本（即IP和电子邮件）以不同的颜色显示，例如'\033 [ 38; 5; 180m'

I would like to print the whole line normally, but have the text inside the brackets (i.e. IP and email) in different color, for instance '\033[38;5;180m'

最好的方法是什么？

我正在使用 python 2.7

推荐答案

我会安装一个自定义处理程序到 sys.stdout ，因此您不必担心更改现有代码- print 处理着色为了你。文本的实际替换可以通过几遍正则表达式完成。*

I would install a custom handler to sys.stdout, so you don't need to worry about changing your existing code - print handles colorizing for you. The actual replacement of text can be done with a couple passes of regex.*

import sys
import re

def colorize(text):
    # Underline <email addresses>:
    text = re.sub('<.*>',lambda m: '\x1b[4m{}\x1b[0m'.format(m.group()), text)
    # Make [IP addresses] peach:
    return re.sub('\[[0-9.]*\]',lambda m: '\x1b[38;5;180m{}\x1b[0m'.format(m.group()), text)

class MyStdout(object):
    def __init__(self, term=sys.stdout):
        self.term = term
    def write(self, text):
        text = colorize(text)
        self.term.write(text)

sys.stdout = MyStdout()
print 'this is an email: <[e-mail]>'
print 'this is an ip: [1.1.1.1]'

这会强调电子邮件地址并制作出您所提供的桃红色IP。

This underlines email addresses and makes IPs that peach color you provided.

*在正则表达式上注。请注意与括号/ IP匹配的那个-我的原始实现中存在一个难以跟踪的错误，因为它与终端转义序列匹配。 uck！

*note on the regex. Be careful with the one that matches brackets/IPs - I had a hard-to-track-down bug in my original implementation because it was matching the terminal escape sequences. Yuck!

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