试图通过用户的输入创建一个对象
我试图通过用户输入创建一个employee
对象,但我遇到了我的代码问题。 当我运行这个没有任何反应,它也没有抛出任何错误。
class employee(object):
def __init__(self,name,pay_rate,monday,tuesday,wednesday,thursday,friday,saturday,sunday):
self.create_employee()
self.name = name
self.pay_rate = pay_rate
self.monday = monday
self.tuesday = tuesday
self.wednesday = wednesday
self.thursday = thursday
self.friday = friday
self.saturday = saturday
self.sunday = sunday
def weekly_total(self):
self.total_weekly_hours = self.monday + self.tuesday + self.wednesday + self.thursday + self.friday + self.saturday + self.sunday
self.emp_name()
print "n Your hours this week are:", self.total_weekly_hours,"n"
def emp_name(self):
print "n Current employee is: ",self.name
def create_employee(self):
self.name = raw_input("Enter new employee name")
self.pay = input("Enter pay rate")
self.monday = raw_input("Enter monday hours")
self.tuesday = raw_input("tuesday hours?")
self.wednesday = raw_input("wed hours?")
self.thursday = raw_input("Thursday hours?")
self.friday = raw_input("Friday hours?")
self.saturday = raw_input("saturday hours?")
self.sunday = raw_input("sunday hours?")
self.object_name = raw_input("Name your object")
self.object_name = employee(self.name,self.pay,self.monday,self.tuesday,self.wednesday,self.thursday,self.friday,self.saturday,self.sunday)
print self.name, " was created"
你当前的代码有一个永无止境的循环,因为__init__
和create_employee
互相调用。 您为初始者中的所有属性采用参数,然后忽略它们并请求用户输入,您将其传递给初始化程序以获取新对象,而忽略它并......
我想你想要的是一个更像是的结构:
class Employee(object): # PEP-8 name
def __init__(self, name, pay, hours):
# assign instance attributes (don't call from_input!)
def __str__(self):
# replaces emp_name, returns a string
@property
def weekly_total(self):
return sum(self.hours)
@classmethod
def from_input(cls):
# take (and validate and convert!) input
return cls(name, pay, hours)
你可以像这样使用:
employee = Employee("John Smith", 12.34, (8, 8, 8, 8, 8, 0, 0))
print str(employee) # call __str__
要么:
employee = Employee.from_input()
print employee.weekly_total # access property
请注意,我不是每天都有单独的实例属性,而是假定每天有一个单独的列表/元组。 如果日期名称很重要,请使用字典{'Monday': 7, ...}
。 请记住,所有raw_input
都是一个字符串,但您可能需要数小时并以浮点形式付费; 有关输入验证的更多信息,请参见此处。
没有运行的原因是因为你已经定义了一个类,但是没有任何东西正在实例化这个类,所以当你运行它时没有任何反应。
但是,如果您要添加该代码来实例化一个类,请说:
e = employee()
e.create_employee()
你会遇到由代码的循环性质引起的错误,正如@jonrsharpe所述。
您可以将create_employees
移到类外部,并将其作为一个包含输入的包装器(包含常规变量或dict
,但不包括类本身),并使用该输入实例化对象。 然后您可以从脚本的主要部分调用该函数。
我建议您阅读关于类的Python文档,以便您可以更熟悉OO范例:
https://docs.python.org/2/tutorial/classes.html
我想你想要这样的事情
class employee(object):
def __init__(self,name,pay_rate,monday,tuesday,wednesday,thursday,friday,saturday,sunday):
self.name = name
self.pay_rate = pay_rate
self.monday = monday
self.tuesday = tuesday
self.wednesday = wednesday
self.thursday = thursday
self.friday = friday
self.saturday = saturday
self.sunday = sunday
@staticmethod
def create_from_rawinput():
return employee(
raw_input("Employee name:"),
raw_input("Pay Rate:"),
raw_input("Enter monday hours:"),
raw_input("Enter tuesday hours:"),
raw_input("Enter wednesday hours:"),
raw_input("Enter thursday hours:"),
raw_input("Enter friday hours:"),
raw_input("Enter saturday hours:"),
raw_input("Enter sunday hours:")
)
new_emp = employee.create_from_rawinput()
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