Python字符串属性

Question

我怎样才能完成这样的工作:

def get_foo(someobject, foostring):
    return someobject.foostring

IE:

如果我这样做 get_foo(obj, "name") 它应该调用 obj.name (将输入视为字符串，但我将其称为 attritube。

谢谢

Answer 1

使用内置函数 getattr .

getattr(object, name[, default])

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.