如下记录一次作业：
很显然，我这个应该属于二逼青年版，会在以后更新文艺青年版的答案。
1、模仿sed，一个文件中，用新字符串替换老字符串。
1 # file = input("file_name") 2 # old_str = input("old_str") 3 # new_str = input("new_str") 4 def change_str(file, old_str, new_str): 5 f = open(file, 'r') 6 lines = f.readlines() 7 flen = len(lines) 8 for i in range(flen): 9 if old_str in lines[i]: 10 lines[i] = lines[i].replace(old_str, new_str) 11 open(file, 'w').writelines(lines) 12 f.close() 13 14 change_str('aaa', 'A', 'ttttttttttttttttttttttttt')
2、查找、添加、删除特定的内容
1 file=open("haproxy_conf","r") 2 rl=file.readlines() 3 lens=len(rl) 4 for i in range(lens): 5 if "oldboy.org" and "frontend" in rl[i]: 6 if rl[i-1] is " ": 7 print(rl[i].strip()) 8 while True: 9 i += 1 10 print(rl[i].strip()) 11 if i == lens-1: 12 break
1 arg = { 2 'bakend': 'www.oldboy.org', 3 'record': { 4 'server': '100.1.7.9', 5 'weight': 20, 6 'maxconn': 30 7 } 8 } 9 arg_list=[] 10 file=open("haproxy_conf","r+") 11 lines=file.readlines() 12 print(lines) 13 for i in arg: 14 if "bakend" == i: 15 arg_list.insert(0,i) 16 arg_list.insert(1,arg[i]) 17 elif "record" == i: 18 arg_list.append(i) 19 for key,value in arg[i].items(): 20 if key == "server": 21 arg_list.insert(3,key) 22 arg_list.insert(4,value) 23 for key, value in arg[i].items(): 24 if key == "weight": 25 arg_list.insert(5,key) 26 arg_list.insert(6,value) 27 for key, value in arg[i].items(): 28 if key == "maxconn": 29 arg_list.insert(7,key) 30 arg_list.insert(8,value) 31 arg_list[0]=arg_list[0]+" "+arg_list[1]+" " 32 arg_list.remove(arg_list[1]) 33 arg_list[5]=str(arg_list[5]) 34 arg_list[7]=str(arg_list[7]) 35 arg_list[1]=" "+arg_list[1]+" "+arg_list[2]+" "+arg_list[3]+" "+arg_list[4]+" "+arg_list[5]+" "+arg_list[6]+" "+arg_list[7] 36 for m in range(6): 37 n = 2 38 arg_list.remove(arg_list[n]) 39 lines.append(" ") 40 lines.append(" ") 41 print(lines) 42 lines = lines +arg_list 43 print(lines) 44 file.writelines(lines) 45 file.close()