基于Python实现大文件分割和命名脚本过程解析
日志文件分割、命名
工作中经常会收到测试同学、客户同学提供的日志文件，其中不乏几百M一G的也都有，毕竟压测一晚上产生的日志量还是很可观的，xDxD，因此不可避免的需要对日志进行分割，通常定位问题需要针对时间点，因此最好对分割后的日志文件使用文件中日志的开始、结束时间点来命名，这样使用起来最为直观，下面给大家分享两个脚本，分别作分割、命名，希望能够给大家提供一点点帮助；
大文件分割
用法：
- python split_big_file.py
- 输入文件全路径名
- 输入期望的分割后每个小文件的行数
- Just wait.
# -*- coding:utf-8 -*-
import os,re,shutil
import platform
sys_name = platform.system().lower()
SPLIT_CHAR = '\\' if sys_name.find('windows') != -1 else '/'
print('input big files`s path:')
_path = raw_input()
names = []
pathes = []
if os.path.isfile(_path):
print('is file')
names.append(_path)
else:
print('is nothing')
'''
elif os.path.isdir(_path):
print('This is dir')
pathes = os.listdir(_path)
print('pathes='+str(pathes))
for i in range(len(pathes)):
fullpath = _path+SPLIT_CHAR+pathes[i]
print('fullpath='+fullpath)
if os.path.isfile(fullpath):
names.append(fullpath)
files.append(open(fullpath).read().split('\n'))
'''
print(len(names))
line_num = int(raw_input('every file`line num = '))
print('line number='+str(line_num))
for i in range(len(names)):
_name = names[i]
ori_name = _name.split(SPLIT_CHAR)[len(_name.split(SPLIT_CHAR))-1]
dir_name = _name.replace(ori_name,'DIR_'+ori_name)
dir_name = dir_name.replace('.','_')
print ori_name
print dir_name
os.system('mkdir '+dir_name)
count = 1
print '已处理：'+str(count)+'行'
part_file = open(dir_name+SPLIT_CHAR+str(0)+'.part.txt','w')
with open(_name, 'rb') as f:
for line in f:
if count%line_num == 0:
part_file.close()
part_file = open(dir_name+SPLIT_CHAR+str(int(count/line_num))+'.part.txt','w')
part_file.write(line+'\n')
count+=1
if count%100000 == 0:
print '已处理：'+str(count)+'行'
print '已处理：'+str(count)+'行'
os.system('python ./get_name_logfile.py '+dir_name)
文件按照开始、结束行时间戳重命名
用法：
python get_name_logfile.py log.txt
python get_name_logfile.py logs
参数选择文件或者文件夹均可，如果是文件夹，则会针对文件夹中的每个文件做处理（不会递归到文件夹下文件夹中的文件哦）；
# -*- coding:utf-8 -*-
import os,re,shutil
import sys
import platform
sys_name = platform.system().lower()
SPLIT_CHAR = '\\' if sys_name.find('windows') != -1 else '/'
_path = sys.argv[1]
names = []
files = []
pathes = []
if os.path.isfile(_path):
print('is file')
names[0] = _path
elif os.path.isdir(_path):
print('This is dir')
pathes = os.listdir(_path)
print('pathes='+str(pathes))
for i in range(len(pathes)):
fullpath = _path+SPLIT_CHAR+pathes[i]
print('fullpath='+fullpath)
if os.path.isfile(fullpath):
names.append(fullpath)
else:
print('is nothing')
print(len(names))
# 日期格式 ： 05-26 18:20:42.093 r'\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}'
#
# 05-26 18:20:43.093：r'\d{2}-\d{2} {1,}\d{2}:\d{2}:\d{2}.\d{1,10}'
date_reg = r'\d{2}-\d{2} {1,}\d{2}:\d{2}:\d{2}.\d{1,10}'
time_reg = r'\d{2}:\d{2}:\d{2}.\d{1,10}'
for i in range(len(names)):
_name = names[i]
print('name='+_name)
# head 尝试在10行内查找日期
head_len = 10
start_time = '(start_time-'
_file_ = open(_name, 'rb')
reads = _file_.read()
_file = reads.split('\n')
if len(_file)/2 < 10:
head_len = len(_file)/2
for j in range(head_len):
res = re.search(date_reg, _file[j])
if res!=None and res.group(0)!=None:
start_time = res.group(0)
print('start_time='+start_time)
break
# tail
tail_len = len(_file)-head_len
end_time = '-end_time)'
for j in range(len(_file)-1,tail_len-1,-1):
res = re.search(time_reg, _file[j])
if res!=None and res.group(0)!=None:
end_time = res.group(0)
print('end_time='+end_time)
break
_file_.close()
ori_name = _name.split(SPLIT_CHAR)[len(_name.split(SPLIT_CHAR))-1]
print('ori_name='+ori_name)
new_name = start_time.replace(':','-')+'__'+end_time.replace(':','-')+os.path.splitext(ori_name)[1]
print('new_name='+new_name)
print("copy %s %s" % (_name, _name.replace(ori_name,new_name)))
#os.system ("copy %s %s" % (_name, _name.replace(ori_name,new_name)))
shutil.copy(_name,_name.replace(ori_name,new_name))
os.system ("rm -rf "+_name)
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持【听图阁-专注于Python设计】。
