python: Exceptions try/except/finally syntax?

注意：没有 try/except/finally 语法

>>> try:
...     raise "trying"
... except "trying":
...     print "catch it"
... finally:
File "", line 5
  finally:
        ^
SyntaxError: invalid syntax

只能如下：

>>> try:
...     try:
...             raise "trying"
...     finally:
...             print "finally"
... except "trying":
...     print "catch it"
...
finally
catch it