如何用python调用求长度函数

Question

报错，请问哪里有问题？

>>> x=array("1,2,3,4,5,6,7,8,9,10,11,12")
>>> print x
1,2,3,4,5,6,7,8,9,10,11,12
>>> n1= len(x0)

Answer 1

len(x)