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第三周作业

  1 #!/usr/bin/env python
  2 
  3 # _*_ coding:utf-8 _*_
  4 import json,os
  5 
  6 def fetch(backend):
  7     flag = False
  8     fetch_list = []
  9     with open('b.txt') as obj:
 10         for line in obj:
 11             if line.strip() == "backend %s"%(backend):
 12                 flag = True
 13                 continue
 14             if line.strip().startswith("backend"):
 15                 flag = False
 16             if flag and line.strip():
 17                 fetch_list.append(line.strip())
 18     return fetch_list
 19 
 20 
 21 def add(dict_info):
 22 
 23     backend_title = dict_info.get("backend")
 24     context_title = "backend %s" % (backend_title)
 25     record_title = dict_info["backend"]
 26     context_record = "server %s %s weight %s maxconn %s" %(record_title["server"],record_title["server"],record_title["weight"],record_title["maxconn"])
 27     fetch_list = fetch(backend_title)
 28 
 29     if fetch_list:
 30         flag =False
 31         has_write = False
 32         with open('b.txt') as read_obj,open('b.new.txt','w')as write_obj:
 33             for line in read_obj:
 34                 if line.strip() == context_title:
 35                     flag = True
 36                     continue
 37                 if flag and line.startswith("backend"):
 38                     flag = False
 39                 if flag:
 40                     for new_line in fetch_list:
 41                         if not has_write:
 42                             temp = '%s%s'%(" "*8,new_line)
 43                             write_obj.write(temp)
 44                             has_write = True
 45                 else:
 46                     write_obj.write(line)
 47 
 48     else:
 49         with open('b.txt')as read_obj,open('b.new.txt','w')as write_obj:
 50             for line in read_obj:
 51                 write_obj.write(line)
 52             write_obj.write('
'+context_title+'
')
 53             temp = " "*8+context_record+'
'
 54             write_obj.write(temp)
 55 
 56     os.rename('b.txt','b.bak.txt')
 57     os.rename('b.new.txt','b.txt')
 58 
 59 
 60 def delete(dict_info):
 61     del_backend = dict_info["backend"]
 62     del_record = dict_info ["crecord"]
 63 
 64     context_title = "backend %s" %(del_backend)
 65     context_record = "server %s %s weight %s maxconn %s"%(del_record["server"],del_record["server"],del_record["weight"],del_record["maxconn"])
 66 
 67     fecth_list = fetch(del_backend)
 68 
 69     if not fecth_list:
 70         return
 71     else:
 72         if context_record not in fecth_list:
 73             print('mei you zhao dao')
 74             return
 75         else:
 76             fecth_list.remove(context_record)
 77 
 78         with open('b.txt','r')as read_obj,open('b.new.txt','w')as write_obj:
 79             flag = False
 80             has_write = False
 81             for line in read_obj:
 82                 if line.strip() == context_title:
 83                     write_obj.write(line)
 84                     flag = True
 85                     continue
 86                 if flag and line.startswith("backend"):
 87                     flag = False
 88                 if flag:
 89                     if not has_write:
 90                         print(fecth_list)
 91                         for new_line in fecth_list:
 92                             temp = '%s%s 
'%(' '*8,new_line)
 93                             write_obj.write(temp)
 94                         has_write = True
 95                 else:
 96                     write_obj.write(line)
 97 
 98     os.rename('b.txt','b.bak.txt')
 99     os.rename('b.new.txt','b.txt')
100 """
101 s = '{"backend":"ttt.oldboy.org","record":{"server":"100.1.7.9","weight":"20","maxconn":"3000"}}'
102 data_info=json.loads(s)
103 add(data_info)
104 delete(data_info)
105 """
106 if __name__ == "__main__":
107     print('1.获取记录 2.添加记录 3.删除记录')
108     select_num = input('plz input backend:')
109 
110     if select_num == "1":
111         backend = input('plz input backend:')
112         fetch_list = fetch(backend)
113         for i in fetch_list:
114             print(i)
115         else:
116             print("shu ru cuo wu")
117             data_str = input("plz input record>>>")
118             data_dict = json.loads(data_str)
119             if select_num == "2":
120                 add(data_dict)
121             elif select_num == "3":
122                 delete(data_dict)
123             else:
124                 print("cuo wu")
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原文地址：https://www.cnblogs.com/hanwei999/p/6058894.html