python try except else finally

#!/usr/bin/python
try:
    try:
        f=open('test.sh', 'r')
        print f.read()
    except:
        print 'except'
    else:
        print 'else'
finally:
    print 'finally'

在phtyon 2.4 下这样可以执行，但：

#!/usr/bin/python
try:
    f=open('test.sh', 'r')
    print f.read()
except:
    print 'except'
else:
    print 'else'
finally:
    print 'finally'

却说语法不对

[pegl@localhost script]$ ./py.py 
  File "./py.py", line 19
    finally:
          ^
SyntaxError: invalid syntax
[pegl@localhost script]$