第一个python 程序

有人在论坛 上问 将日志格式化的方法，

刚好学python,就拿这个练手了：

09:55:54: ERROR1 /tmp/error/log.3 50 times
Mon Jun 28 00:00:53 2009
09:55:54: ERROR1 /tmp/error/log.3 50 times
09:56:09: ERROR1 /tmp/error/log.14 50 times
10:56:12: ERROR1 /tmp/error/log.14 100 times
10:56:23: ERROR2 /tmp/error/log.5 50 times
11:56:26: ERROR2 /tmp/error/log.1 50 times
11:56:27: ERROR2 /tmp/error/log.5 100 times
Mon Jun 29 00:00:53 2009
15:56:29: ERROR3 /tmp/error/log.1 100 times
15:56:32: ERROR3 /tmp/error/log.1 150 times
16:56:33: ERROR4 /tmp/error/log.6 50 times
16:56:36: ERROR4 /tmp/error/log.6 100 times
16:56:40: ERROR4 /tmp/error/log.12 50 times
Mon Jun 30 00:00:53 2009

格式化成：

2009|Jun|28|10|ERROR1|1
2009|Jun|28|10|ERROR2|1
2009|Jun|29|16|ERROR4|3
2009|Jun|29|15|ERROR3|2

python 源代码：

#!/usr/bin/env python
importre
importsys

defformat_log(logf):
re_hour = re.compile(r'^/d/d:')
re_sp_split = re.compile(r'/s+')

#extract the day from time line
make_day = lambdad:d[4] + '|'+ d[1]+ '|'+ d[2]
make_key = lambdad,c:d + '|'+ c[0][0:2] + '|'+ c[1]
cur_day = 'n/a|n/a|n/a'

log_cnt=dict()
forline inlogf:
m = re_hour.match(line)
cols = re_sp_split.split(line)

iflen(cols) < 3: #not a valid log
continue

ifm isnotNone: #this is log line ,not date
key = make_key(cur_day, cols)
#date | hour | err_type
ifkey notinlog_cnt:
log_cnt[key] = 1
else:
log_cnt[key] += 1
else:
iflen(cols) < 5: #not a valid log
continue
cur_day=make_day(cols)

sorted_key = log_cnt.keys()
sorted_key.sort()

forkey insorted_key:
print'%s|%d'% (key, log_cnt[key])


if__name__ == '__main__':
format_log(sys.stdin)

python 比较易懂，这点比perl 要好多了。

上边的代码，即使不会python的人也能看懂60%

帖子链接：

http://bbs.chinaunix.net/viewthread.php?tid=1497342&extra=&page=1