Python异常处理体系结构分析(2)_JavaVideo java学习从这里开始

)t-W4bW,o2]#ZN_!V1Vv0'''输出： : local variable 'b' referenced before assignment ''Python学习$}7f jGK(K-D O

4IYD_ s,i P0--------------------------------------------------------------------------------Python学习k-eb[8|&Rre9d

Python学习A,R6oT4ld;E{

方法二：采用traceback模块查看异常，需要导入traceback模块Python学习q/h$txh^

Python学习"`v2lS-wsy

''' 捕获异常的第二种方式，使用traceback查看异常 '''Python学习$S0jCO?5d9t3a

,Z6VV4x:^qy~d*V0try:

;L&u'e,BYX0 Python学习}B3Cc(E sa#Uf7^.g

a = b

{c0lJd0

Vd8E D\I0b = cPython学习7CE4ZU NS

3Z| ztEj!lhF0except:Python学习"c3z?tU/JJ;Z

Python学习Vln*sD$ku9j)S

print traceback.print_exc()

Hv``~/_m0 Python学习1w.zF*D'K;\

'''输出： Traceback (most recent call last):

X2K{3t%]"ql&q l0

+k'lY%wq0File "test.py", line 20, in mainPython学习6`1CC Y6r

/Ew)HZ$IGA7NX0a = bPython学习3CHU*ifF'\;v:R)S7p

Python学习9H-M2x+Uv{]Tz,?

UnboundLocalError: local variable 'b' referenced before assignmenPython学习5[.v \ff%W[

1gm%s[WBl |m$E8e0--------------------------------------------------------------------------------Python学习5N_Ox$q#?]

(责任编辑：JavaVideo)

Python异常处理体系结构分析(2)