Python——在类和方法的外部和内部使用变量
Python 是一种面向对象的编程语言。Python 中几乎所有东西都是对象,有自己的属性和方法。类就像一个对象构造器,或一个创建对象的“蓝图”。
在类之外定义的变量可以通过编写变量名来访问类或类中的任何方法。
示例
# defined outside the class' # Variable defined outside the class. outVar = 'outside_class' print("Outside_class1", outVar) ''' Class one ''' class Ctest: print("Outside_class2", outVar) def access_method(self): print("Outside_class3", outVar) # Calling method by creating object uac = Ctest() uac.access_method() ''' Class two ''' class Another_ Ctest_class: print("Outside_class4", outVar) def another_access_method(self): print("Outside_class5", outVar) # Calling method by creating object uaac = Another_ Ctest_class() uaac.another_access_method() The variables that are defined inside the methods can be accessed within that method only by simply using the variable name. # defined inside the method' '''class one''' class Ctest: print() def access_method(self): # Variable defined inside the method. inVar = 'inside_method' print("Inside_method3", inVar) uac = Ctest() uac.access_method() '''class two''' class AnotherCtest: print() def access_method(self): print() uaac = AnotherCtest() uaac.access_method()
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