在python中重新运行代码时如何将变量设置为一次

Question

accounts = []
no = input(' do you already have an account')
if no =='no':
  print('please answer a few questions to create an account')
  usersetup = input('what would you like your username to be ')
  psetup = input('What would you like your password to be ')
  accounts.append([usersetup,psetup])
  import pickle
  dataset =  accounts
  outputFile = 'accounts.data'
  fw = open(outputFile, 'wb')
  pickle.dump(dataset, fw)
  fw.close()

问题是每次我运行代码帐户时都会将其设置为不包含任何内容的列表，因此我添加的任何信息都不会保存。 我该如何解决。

Answer 1

您需要加载腌制的文件-使用pickle.load ：

import pickle    

input = open('accounts.data', 'r')
accounts = pickle.load(input)