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python中的变量定义是很灵活的,很容易搞混淆,特别是对于class的变量的定义,如何定义使用类里的变量是我们维护代码和保证代码稳定性的关键。
为贡觉等地区用户提供了全套网页设计制作服务,及贡觉网站建设行业解决方案。主营业务为成都网站制作、成都网站设计、贡觉网站设计,以传统方式定制建设网站,并提供域名空间备案等一条龙服务,秉承以专业、用心的态度为用户提供真诚的服务。我们深信只要达到每一位用户的要求,就会得到认可,从而选择与我们长期合作。这样,我们也可以走得更远!#!/usr/bin/python #encoding:utf-8 global_variable_1 = 'global_variable' class MyClass(): class_var_1 = 'class_val_1' # define class variable here def __init__(self, param): self.object_var_1 = param # define object variable here self.object_var_2 = 'object_val_2' # define object variable here self.object_func3() def object_func1(self, param): local_var_1 = param # define lcoal variable here local_var_2 = 'local_val_2' # define local variable here self.internal_var_1 = 'internal_val_1' # define internal variable here print(local_var_1) # we can use local variable of current here print(local_var_2) # we can use local variable of current here print(MyClass.class_var_1) # we can use class variable here, but you have using class name ass prefix print(self.class_var_1) # we can use class variable as object variable here print(self.object_var_1) # we can use object variable here print(self.object_var_2) # we can use object variable here print(self.internal_var_1) # we can use internal variable here #print(local_var_3) # we can't use local variable in another function print(global_variable_1) # we can use global variable here def object_func2(self, param='func_val_1'): local_var_3 = param # define local variable here print(local_var_3) # we can use lcoal variable here print(self.internal_var_1) # we can use internal variable defined in class_func1, but you have to call class_func1 first print(MyClass.class_var_1) # we can use class variable here, but you have using class name ass prefix print(self.class_var_1) # we can class variable here print(self.object_var_1) # we can use object variable here print(self.object_var_2) # we can use object variable here print(global_variable_1) # we can use global variable here def object_func3(self, param='func_val_1'): self.object_var_3 = param # because this function called in construction function, so this is defined as object variable, not internal variable self.object_var_4 = 'object_val_4' # because this function called in construction function, so this is defined as object variable, not internal variable print(global_variable_1) # we can use global variable here # define class function def class_func4(): print(MyClass.class_var_1) print(global_variable_1) # we can use global variable here if __name__ == '__main__': myObject = MyClass('object_val_1') print(MyClass.class_var_1) # we can use class variable directly here #print(MyClass.object_var_1) # we can't use object variable here print(myObject.object_var_1) # we can use object variable here print(myObject.object_var_2) # we can use object variable here print(myObject.object_var_3) # we can use object variable here print(myObject.object_var_4) # we can use object variable here #print(myObject.internal_var_1) # we can't use internal variable as object variable here MyClass.class_func4() # we can use class function here #MyClass.object_func2(myObject, 'local_var_3') # internal variable can't be used in this function myObject.object_func1('local_var_1') # call first function myObject.object_func2('local_var_3') # call second function print(global_variable_1) # we can use global variable here
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