Python实现简易英文字典程序：增删查改与文件持久化

keys=[]
dic={}
def rdic():
  fr = open('dic.txt','r')  
  for line in fr:
    line = line.replace("\n",'')
    v = line.split(':')
    dic[v[0]] = v[1]
    keys.append(v[0])
  fr.close()
def centre():
  n = input("请输入进入相应模块（添加、查询、退出）：")
  if n == "添加":
    key= input("plsease input English：")
    if key not in keys:
      value=input("please input Chinese:")
      dic[key]=value
      keys.append(key)
    else :
      t=input("如果添加新的意思请输入 Y,否则输入N:")
      if ( t=='Y'):
        temp=""
        temp=temp+dic[key]
        key1= input("请输入中文")
        temp=temp+","+key1
        print(temp)
        #keys.append(temp)
        dic[key]=temp
        print(dic)
        return 0
      else:
        return 0
  elif n== "查询":
    key= input("plsease input English：")
    print(keys)
    print(dic)
    if key not in keys:
      print("the english not in the dic.")
    else :
      print(dic[key])
  elif n == "退出" :
    return 1
  else :
    print("输入有误")
    return 0
def wdic():
  #print("!")
  with open('dic.txt','w') as fw:
    for k in keys:
      fw.write(k+':'+dic[k]+'\n')
def main():
  rdic()
  while True:
    print(keys)
    print(dic)
    n=centre()
    print(keys)
    print(dic)
    if n==1:
      break
    if n==0:
      continue
  wdic()
main()