python查找替換(二)
場景：
在特定目錄下部分配置文件中的key/value值需進行替換.
目錄:e:\doc
文件數：三個，分別是1.properties,2.properties,3.properties,
用於替換的值保存在mysql數據中：clb_config
代碼實現:
__author__ = 'Administrator'
#encoding: UTF-8
import time,MySQLdb
import fnmatch
import re,os
#從數據庫獲得目標key/value
conn=MySQLdb.connect(host="192.168.1.23",user="myuser",passwd="123456",db="manage",charset="utf8")
cursor = conn.cursor()
#cursor.execute("select key,value from manage_config")
#列出特定目錄下的所有配置文件
filelist = []
for file in os.listdir(r'E:\doc'):
if fnmatch.fnmatch(file, '*.properties'):
filelist.append(file)
#切換到配置文件目錄
source = "E:\doc"
os.chdir(source)
#逐個查找從當前目錄下的各個配置文件key列表
for thisfile in filelist:
fd=open(thisfile)
devconfigfile = fd.read()
print "First For,file is %s" %(thisfile)
p = re.compile("(.*)=") #實例化正則表達式
keylist = p.findall(devconfigfile) #獲得原始key列表
fd.close
#從數據庫中找到當前項目的所有key/value,並對當前配置文件進行value替換
sql="select key,value from clb_config"
for filekey in keylist:
filekey = filekey.replace(" ","") #去掉空格
print " Second For,filekey is %s" %(filekey)
cursor.execute(sql) #以重新執行sql代替恢復遊標
for row in cursor.fetchall(): #從sql結果集中逐行取key/value對
dbkey=row[0]
dbvalue=row[1]
if filekey == dbkey:
s=[filekey,dbvalue] #合併出新key/value值
newvalue='='.join(s)
#print "---------------- %s file ------------------" %(thisfile)
print " Third For,filekey and dbkey is %s %s" %(filekey,dbkey)
print " newvalue is %s" %(newvalue)
devconfigfile, number = re.subn(filekey + ".*" + "=" + ".*",newvalue,devconfigfile)
fd=open(thisfile,'w')
fd.write(devconfigfile)
fd.close
fd = open(thisfile)
result = fd.read()
#print result
fd.close