#-*-coding:utf-8-*-
from sys import exit
class newgame(object):
def __init__(self, start):
self.start = start
#self.cccl()
def play(self):
next = self.start
while True:
print "\n--------"
print next
room = getattr(self, next)
next = room()
def death(self):
print "this is death"
exit(-1)
def cccl(self):
print "this is bbbb"
#return self.al() 如果加上return 或者 exit 就成功不加则报错
#exit(1)
def al(self):
print "this is al"
action = raw_input("> ")
if action == '1':
return "death"
elif action == '2':
return "cccl"
ngame = newgame("al")
ngame.play()
line 17, in play
room = getattr(self, next)
TypeError: getattr(): attribute name must be string
请问这是为什么呢?
pyenv version
anaconda-2.0.1 (set by /usr/local/opt/pyenv/version)
但是放到 ideone.com 上就又不报错了
getattr
第二个参数必须为str
,而代码里面next = room()
应该是这个room
返回了一个非 str 的东西。说起来room
是个什么鬼?代码片段里面根本没出现过。正确的写法为
room = getattr(self, 'next')
.你可以认为
getattr
向对象传递了一条名字叫做'next'
的短信, 请求'next'
的内容. 既然是短信, 那必须是字符串啦.