Python基础--异常

>>>raise Exception
Traceback (most recent all last):

class SomeCustomException(Exception):pass

try:
x = input('Enter the first number: ')
y = input('Enter the second number: ')
print x/y
except ZeroDivisonError:
print 'The second number can't be zero!'

try:
x = input('Enter the first number: ')
y = input('Enter the second number: ')
print x/y
except ZeroDivisonError:
print 'The second number can't be zero!'
except TypeError:
print 'That wasn't a number, was it?'

try:
x = input('Enter the first number: ')
y = input('Enter the second number: ')
print x/y
except (ZeroDivisonError, TypeError, NameError):
print 'Your numbers were bogus...'

try:
print' '
except:
print' '
else:
print' '