Question

我正在创建一个User类，在这个类中我想创建一个提示用户输入数据的方法。如何在populate（）方法中使用 init 参数作为有效值？

这是我的代码：

class User:
def __init__(self, last_name, first_name, social, rep_code, data_source):
    self.last_name = last_name
    self.first_name = first_name
    self.social = social
    self.rep_code = rep_code
    self.data_source = data_source

def populate(self):
    #prompt for user info and write to file
    this.last_name = input("Please enter user last name:\n")
    this.first_name = input("Please enter user first name:\n")
    this.social = input("Please enter user social security number:\n")
    this.rep_code = input("Please enter user rep code:\n")
    this.data_source = input("Please choose the Data Source. Enter 6 for 
        NFS, 1 for DST, 2 for DAZL:\n")

我将此方法作为user1.populate（）

运行

谢谢。

Answer 1

这是你在找什么？

class User:
    def __init__(self, last_name, first_name, social, rep_code, data_source):
        self.last_name = last_name
        self.first_name = first_name
        self.social = social
        self.rep_code = rep_code
        self.data_source = data_source


    @staticmethod
    def create():
        last_name = input("Please enter user last name:\n")
        first_name = input("Please enter user first name:\n")
        social = input("Please enter user social security number:\n")
        rep_code = input("Please enter user rep code:\n")
        data_source = input("Please choose the Data Source. Enter 6 for NFS, 1 for DST, 2 for DAZL:\n")
        return User(last_name, first_name, social, rep_code, data_source)

此代码允许您调用User.create()来提示问题和return User对象。这与this替换为self的代码不同，因为这不需要现有的User对象，而是创建一个新对象。

用法：

如何执行此操作的示例可能是这样的。

usr = User.create()
print("First name: " + usr.first_name)
print("Last name: " + usr.last_name)

Answer 2

我会把查询放在课外：

def query():
    attributes = {}
    #prompt for user info and write to file
    attributes['last_name'] = input("Please enter user last name:\n")
    attributes['first_name'] = input("Please enter user first name:\n")
    attributes['social'] = input("Please enter user social security number:\n")
    attributes['rep_code'] = input("Please enter user rep code:\n")
    attributes['data_source'] = input("Please choose the Data Source. Enter 6 for NFS, 1 for DST, 2 for DAZL:\n")
    return attributes

班级看起来像这样;

class User:
    def __init__(self, last_name, first_name, social, rep_code, data_source):
        self.last_name = last_name
        self.first_name = first_name
        self.social = social
        self.rep_code = rep_code
        self.data_source = data_source

用法：

>>> attrs = query()
Please enter user last name:
q
Please enter user first name:
w
Please enter user social security number:
e
Please enter user rep code:
r
Please choose the Data Source. Enter 6 for NFS, 1 for DST, 2 for DAZL:
t

>>> me = User(**attrs)
>>> me.data_source
't'
>>> me.first_name
'w'
>>> me.last_name
'q'
>>> me.rep_code
'r'
>>> me.social
'e'
>>>

Answer 3

class User:
    def __init__(self):

        #prompt for user info and write to file
        self.last_name = input("Please enter user last name:\n")
        self.first_name = input("Please enter user first name:\n")
        self.social = input("Please enter user social security number:\n")
        self.rep_code = input("Please enter user rep code:\n")
        self.data_source = input(
        '''Please choose the Data Source. Enter 6 for 
            NFS, 1 for DST, 2 for DAZL:\n''')

```

使用此功能，user = User()之类的呼叫将在终端发出提示。可能更有用的实现是

class User:
    def __init__(
     self, last_name=None, first_name=None, social=None, 
     rep_code=None, data_source=None):

        self.last_name = last_name
        self.first_name = first_name
        self.social = social
        self.data_source = data_source

    def populate(self):
        #prompt for user info and write to file
        self.last_name = input("Please enter user last name:\n")
        self.first_name = input("Please enter user first name:\n")
        self.social = input("Please enter user social security number:\n")
        self.rep_code = input("Please enter user rep code:\n")
        self.data_source = input(
        '''Please choose the Data Source. Enter 6 for 
            NFS, 1 for DST, 2 for DAZL:\n''')

这样您就可以使用User初始化空白user = User()，然后通过user.populate()询问提示。

（已编辑以更改第一个__init__示例。）

使用类参数作为同一类中的方法的参数

3 个答案: