Question

我试图存储物品并且能够成功地完成它。但是我遇到了问题，而在处理它时..错误在下面给出

person.py

class Person:
    def __init__(self, name, age, pay=0, job=None):
        self.name = name
        self.age  = age
        self.pay  = pay
        self.job  = job

    def lastname(self):
        return  self.name.split()[-1]

    def giveraise(self,percent):
        #return self.pay *= (1.0 + percent)
        self.pay *= (1.0 + percent)
        return self.pay

Manager.py

from Person import Person

class Manager(Person):
    def giveRaise(self, percent, bonus=0.1):
        self.pay *= (1.0 + percent + bonus)        
        return self.pay

update_db_classes.py

import shelve
from Person import Person
from Manager import Manager
bob = Person('Bob Smith', 42, 30000, 'software')
sue = Person('Sue Jones', 45, 40000, 'hardware')
tom = Manager('Tom Doe',  50, 50000)

db = shelve.open('class-shelve')
db['bob'] = bob
db['sue'] = sue
db['tom'] = tom
db.close()

检索对象的代码.. dump_db_classes.py

import shelve
db = shelve.open('class-shelve')
for key in db:
    print(key, '=>\n  ', db[key].name, db[key].pay)

bob = db['bob']
print(bob.lastName())
print(db['tom'].lastName())

错误： C：\ Python27 \基础＆GT; dump_db_classes.py bob =＆gt; 鲍勃史密斯30000 sue =＆gt; 苏琼斯40000 tom =＆gt; Tom Doe 50000 Traceback（最近一次调用最后一次）：文件“C：\ Python27 \ Basics \ dump_db_classes.py”，第8行，in 打印（bob.lastName（）） AttributeError：'Person'对象没有属性'lastName'

Answer 1

Python区分大小写。您拨打bob.lastName()但Person方法为.lastname()。错误消息试图告诉您：

AttributeError: 'Person' object has no attribute 'lastName'

Python Shelve无法检索对象

1 个答案: