Dynamically add class member using string to name it

Question

In Python, I'm quite aware of the fact that one may add members to classes after their definition. But, is there a way to name a member using the content of a string?

For example, I may do this:

class A:
    pass
A.foo = 10

a = A()
print a.foo

But is there some way to do this:

name = "foo"
class A:
    pass
A.[some trick here(name)] = 10

a = A()
print a.foo

Answer 1

使用setattr ：

setattr(A, 'foo', 10)

Answer 2

Yes! This can be done with a combination of getattr and setattr .

setattr(A, 'foo', 10)
getattr(A, 'foo') // Returns 10

Answer 3

FYI - you can generate a dict from the members of an entire object using vars() :

class A:
    pass
A.foo = 10
A.bar = 'hello'

a = A()
b = vars(a)
print(b['bar'])  # prints hello