python - 使用变量调用类的属性

Question

这个问题已经有答案了:

Python: access class property from string [duplicate] (4 个回答)

已关闭 5 年前。

我对Python还是有点陌生​​，我正在尝试使用变量来调用类的特定属性。但是，我想我可能会错过一些东西。我在下面举了一个例子。感谢您的帮助!

 class character(object):
        def __init__(self, name, name1, name2):
            self.name = name
            self.name1 = name1
            self.name2= name2

bob = character('bob', 'bob1', 'bob2')


def print_name(var1, var2):
    print(var1.var2)

print_name(bob, 'name1')

Answer 1

尝试使用getattr:

class character(object):
        def __init__(self, name, name1, name2):
            self.name = name
            self.name1 = name1
            self.name2= name2

bob = character('bob', 'bob1', 'bob2')


def print_name(var1, var2):
    print(getattr(var1,var2))

print_name(bob, 'name1')

这来自documentation :

Return the value of the named attribute of object. name must be a string. If the string is the name of one of the object’s attributes, the result is the value of that attribute. For example, getattr(x, 'foobar') is equivalent to x.foobar. If the named attribute does not exist, default is returned if provided, otherwise AttributeError is raised.