Python 联合体出现未定义错误

Question

from ctypes import *

class ba(Union):

_fields_ = [
            ("ba_long",c_long),
            ("ba_int",c_int),
            ("ba_char",c_char*8)
] 

value=raw_input("Enter the amount of ba to put into the beer vat:")

my=ba(int(value)) 

print"ba amount as long :%ld" % my.ba_long
print"ba amount as an int :%d" % my.ba_int
print"ba amount as  a char :%s" % my.ba_char

    这是我的代码
    错误显示ba未定义

Answer 1

http://www.myexception.cn/perl-python/1733273.html