python堆栈追踪异常

以前常用的写法

try:
    print(a)
except Exception, e:
    print("err exception is %s" % e)

输出

err exception is name 'a' is not defined

异常打印信息不明显

推荐 traceback 来追踪异常

import traceback
try:
    print(a)
except Exception, e:
    print("err exception is %s" % traceback.format_exc())

输出

err exception is Traceback (most recent call last):
File "test.py", line 828, in <module>
print(a)
NameError: name 'a' is not defined