python - 不明白这个AttributeError的原因

Question

这段代码有什么问题？当我运行时它告诉我:

Traceback (most recent call last):
   line 24, in <module>
    people.append(Dict)
AttributeError: 'str' object has no attribute 'append'

我的代码:

live = 1

while live == 1:

#reading Database

dataRead = open ("db.txt","r")
if dataRead.read() != " ":
    dataRead.close()
    people = open ('db.txt','r').read()
    do = input ('What Do You Want ? (Search , add) :\n')

    #add people

if do == 'add':

    #Get The New Data
    n_Name = input ('enter the new name:\n')
    n_age = input ('enter the new age:\n')

    #new Dict
    Dict = {'Name:':n_Name,'age':n_age}

    people.append(Dict)

    #adding people to file

    dataWrite = open ("db.txt","w")
    dataWrite.write(str(people))
    dataWrite.close()

live = 0

Answer 1

问题是，在第 24 行，您尝试将字典附加到字符串。当您读取 db 文件时，它会将其作为字符串读取。而且代码确实很困惑，还有很多更好的方法可以做到这一点。但这不是重点，根据您的错误输出，append() 方法用于列表，变量“people”是一个字符串。