1
我一直在试图让这本词典在Python中工作，但我失败了。我在SO上找到了一些类似的解决方案，但我无法让它们工作。我很确定它与我调用函数的方式有关。我已经尝试将每件作品放入一个单独的功能中，但失败了。我仍然得到以下错误信息：Python EOFError：Ran输入错误信息
employee_dictionary = pickle.load(file)
EOFError: Ran out of input
这里是我的代码：
import pickle
import os.path
def main():
employee_dictionary = {}
if os.path.exists("employee.dat"):
file = open("employee.dat","rb")
employee_dictionary = pickle.load(file)
file.close()
else:
emp1 = Employee("Susan Myers", 47899, "Accounting", "Vice President")
emp2 = Employee("Mark Jones", 39119, "IT", "Programmer")
emp3 = Employee("Joy Rogers", 81774, "Manufacturing", "Engineer")
employee_dictionary = {emp1.get_ID_number(): emp1.get_name()+ '' + emp1.get_dept()+ '' + emp1.get_job_title(),\
emp2.get_ID_number(): emp2.get_name()+ '' + emp2.get_dept()+ '' + emp2.get_job_title(),\
emp3.get_ID_number(): emp3.get_name()+ '' + emp3.get_dept()+ '' + emp3.get_job_title()}
return employee_dictionary
employee_dictionary = main()
choice = 'y'
while choice.upper()== 'Y':
print("Make a selection from the following actions:")
print("Lookup an employee in the dictionary: 1")
print("Add a new employee to the dictionary: 2")
print("Change an existing employee's name, department, and job title in the dictionary: 3")
print("Delete an employee from the dictionary: 4")
print("Quit the program: 5")
selection = input("Make your selection: ")
if int(selection) == 1:
id_number = input("What is the employee's ID number?")
if int(id_number) in employee_dictionary.keys():
print(employee_dictionary[int(id_number)])
else:
print("The employee does not exist.")
else:
if int(selection) == 2:
id_number = input("What is the employee's ID number?")
if int(id_number) in employee_dictionary.keys():
print('That employee already exists.')
else:
name = input("Enter the name of the employee:")
dept = input("Enter the department of the employee:")
title = input("Enter the job title of the employee:")
emp4 = Employee(name,int(id_number), dept, title)
employee_dictionary[emp4.get_ID_number()]= emp1.get_name()+ '' + emp4.get_dept()+ '' + emp4.get_job_title()
print("The employee was added.")
else:
if int(selection) == 3:
id_number = input("What is the employee's ID number?")
if int(id_number) in employee_dictionary.keys():
name = input("Enter the name of the employee:")
dept = input("Enter the department of the employee:")
title = input("Enter the job title of the employee:")
emp4 = Employee(name,int(id_number), dept, title)
employee_dictionary[emp4.get_ID_number()]= emp1.get_name()+ '' + emp4.get_dept()+ '' + emp4.get_job_title()
print("The employee record has been updated.")
else:
print("Record not found.")
else:
if int(selection) == 4:
id_number = input("What is the employee's ID number?")
print("Deleted: ", employee_dictionary.pop(int(id_number),"Record not found."))
else:
if int(selection)!=5:
print("")
choice = input("Do you want to make another selection (y or n)?")
file = open('employee.dat','wb')
pickle.dump(employee_dictionary,file)
file.close()
原来这里是Employee类：
class Employee:
def __init__(self, name, ID_number, dept, job_title):
self.__name = name
self.__ID_number = ID_number
self.__dept = dept
self.__job_title = job_title
#set methods
def set_name(self,name):
self.__name = name
def set_ID_number(self,ID_number):
self.__ID_number = ID_number
def set_dept(self,dept):
self.__dept = dept
def set_job_title(self,job_title):
self.__job_title = job_title
#get methods
def get_name(self):
return self.__name
def get_ID_number(self):
return self.__ID_number
def get_dept(self):
return self.__dept
def get_job_title(self):
return self.__job_title
def main():
emp1 = Employee("Susan Myers", 47899, "Accounting", "Vice President")
emp2 = Employee("Mark Jones", 39119, "IT", "Programmer")
emp3 = Employee("Joy Rogers", 81774, "Manufacturing", "Engineer")
#A bunch of print statements go here
main()
目录中是否有一个空的'employee.dat' ?.假设较早的运行崩溃并留下一个空文件。您下次遇到此错误。所以，它的部分问题是你想如何处理一个损坏的.dat文件。你可以捕获异常，删除文件，然后在else子句中执行。您需要为此重构您的代码。 – tdelaney
'file = open（'employee.dat'，'wb'）'有点危险。假设转储中出现问题，并且您收到空的或损坏的文件？您可以将其保存为不同的名称，并在知道已关闭时覆盖旧的.dat。 – tdelaney
问题不在于您的代码*本身*，而是与文件中的数据有关。该文件是否因最初被腌渍而被修改或损坏？您使用的是与原始文件版本相同的Python版本吗？默认字符编码（您正在使用的）与最初腌制文件的编码是否相同？如果没有确认这个事实（即文件是腐败/不完整的），原始的泡菜操作是否会中途失败？ – Travis