标签:att for none aaa bsp import username match declare
一、获取类里面的静态属性以及动态属性的方法
方式一:
# ===========方式一================ class Foo(object): user = 123 def __init__(self): self.name = 123 self.age = 456 def aaa(self): self.name = ‘sd‘ obj = Foo() # print(obj.__dict__) #获取对象属性 # print(Foo.__dict__) #获取类里面的所有属性以及方法等
方式二:
# ===============方式二================== class Foo2(object): A = 123 def __init__(self): self.name = ‘haiyan‘ self.age = 22 # print(self.__class__.field) #获取当前类的 def __new__(cls, *args, **kwargs): print(cls.__dict__) return object.__new__(cls) Foo2()
二、自定义Form组件示例
import re import copy class ValidateError(Exception) : ‘‘‘自定义异常‘‘‘ def __init__(self,detail): self.detail = detail # ===========自定义插件=============== class TextInput(object): def __str__(self): return ‘<input type="text">‘ class EmailInput(object): def __str__(self): return ‘<input type="email">‘ # ============字段:内部包含正则用于验证====================== class Field(object): def __init__(self,required=True,error_message=None, widgets= None): self.required = required self.error_message = error_message if not widgets: self.widgets = TextInput() #设置默认 else: self.widgets = widgets def __str__(self): # return self.widgets return str(self.widgets) #将对象转成字符串 class CharField(Field): def valid(self,val): if self.required: if not val: msg = self.error_message[‘required‘] raise ValidateError(msg) #调用自定义的异常 return val class EmailField(Field): ERG = "^\w+@\w+$" def valid(self,val): if self.required: if not val: msg = self.error_message[‘required‘] raise ValidateError(msg) # print(val, type(val)) result = re.match(self.ERG,val) if not result: msg = self.error_message.get(‘invalid‘,‘格式错误‘) raise ValidateError(msg) return val # ========================== class Form(object): def __init__(self,data): # print(UserForm.__dict__)#获取派生类中的所有静态字段 # print(self.__class__.__dict__) #静态动态的获取类中的所有静态字段 self.data = data self.fields = copy.deepcopy(self.__class__.declare_field) #获取字段 self.clean_data = {} self.errors = {} def __new__(cls, *args, **kwargs): #在__new__里面也可以获取类中的所有静态字段 declare_field = {} for field_name , field in cls.__dict__.items(): # print(field_name,field) if isinstance(field,Field): declare_field[field_name] = field cls.declare_field = declare_field return object.__new__(cls) #创建对象 def is_valid(self): #用户提交的数据 # self.data #{‘username‘:"zzz","pwd":18} # self.fields #{‘username‘: CharField(),"pwd": EmailField()} for field_name , field in self.fields.items(): try: input_val = self.data.get(field_name) # print("---------------",field_name,input_val) val = field.valid(input_val) #内置的验证规则自己去验证 method = getattr(self,"clean_%s"%field_name,None) #默认为None if method: val = method(val) self.clean_data[field_name] = val except ValidateError as e: self.errors[field_name] = e.detail return len(self.errors) ==0 #根据错误的返回,如果没有错误返回True,有错误返回False def __iter__(self): ##########自定义生成标签3 return iter(self.fields.values()) #返回的是一个迭代器 # ======================= class UserForm(Form): username = CharField(error_message={‘required‘: ‘用户名不能为空‘}, widgets=TextInput()) # email = EmailField(error_message={‘required‘: ‘密码不能为空‘, ‘invalid‘: ‘邮箱格式错误‘}, widgets=EmailInput()) obj = UserForm(data={‘username‘:"haiyan","email":"dsfsgd"}) if obj.is_valid(): print(obj.clean_data) else: print(obj.errors)
标签:att for none aaa bsp import username match declare
原文地址:https://www.cnblogs.com/zcfx/p/11326388.html