Question

我有一个以下格式的日志文件。

Wed Feb 21 00:59:32 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
     '----action----tansfer'
     '----failed----'
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
   <Error occurred at line 44>
<html>
.....
....
....
</html>
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message

我需要将日志格式设置为以下格式，以便我可以应用下行文本处理逻辑。

Wed Feb 21 00:59:32 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message '----action----tansfer' '----failed----'
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message <Error occurred at line 44> <html>.... ..... ....</html>
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message

是否可以获取这种格式的日志消息。我在想类似的东西-如果换行符后没有日期正则表达式，则替换为空格字符，但不能完全构造正则表达式。

TIA

Answer 1

以下代码将读取日志文件，然后以所需格式将其写回到out.txt文件中。在下一行中，我使用re进行负向超前的任务

import re
with open('log.txt', 'r') as f:
    a = f.read()

a = re.sub(r'\n(?!Wed)', '', a)

with open('out.txt', 'w') as f:
    f.write(a)

输出：

Wed Feb 21 00:59:32 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message     '----action----tansfer'     '----failed----'
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message   <Error occurred at line 44><html>.............</html>
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message

Answer 2

此正则表达式字符串看起来像您所需要的：

'.*\d{2}\:\d{2}\:\d{2}\ \d{4}.*'

它尝试与此匹配：

00:59:33 2018 # Any number works as long as it's this format

Answer 3

只是我的非正则表达式方法：

with open("./t.txt") as read_file: #Current Log file
    with open("./fix_t.txt", 'w') as write_file: #A new log file
        data = False
        for line in read_file:
            if "message" in line:
                if data: write_file.write(data + "\n")
                data = line.strip("\n")
            else:
                data += line.strip("\n")
        if data: write_file.write(data + "\n")

产生新的日志文件：

Wed Feb 21 00:59:32 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message     '----action----tansfer'     '----failed----'
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message   <Error occurred at line 44><html>.............</html>
Wed Feb 21 00:59:33 2018 XXXXXX.x1:00000: message

将没有时间戳的多行日志消息合并为python中的一行

3 个答案: