On Mon, 24 Jan 2005 00:31:17 -0700, Steven Bethard <[EMAIL PROTECTED]> wrote:
>Bengt Richter wrote:
>> So, e.g., for
>>
>> >>> presets = dict(a=1, b=2, deftime=__import__('time').ctime())
>>
>> in the decorator args, the next version will act as if the decorated
>> function had the source code
>>
>> >>> print '%s = __frompresets__' % ', '.join(sorted(presets))
>> a, b, deftime = __frompresets__
>>
>> for the current version, except that it will be hidden.
>
>Cool! Keep us posted. I assume you'll put this into the Cookbook?
>
Not ready for prime time, I guess, but I made a module that does presets
and also adjusts parameters and count to do currying without nested function
calling in the curried function.
>>> from presets import presets, curry
>>> @presets(verbose=True, a=1, b=2, deftime=__import__('time').ctime())
... def foo():
... print (a, b)
... print deftime
...
presets: -- "name(?)" means name may be unused
a = 1
b = 2
deftime = 'Mon Jan 24 12:16:07 2005'
>>> foo()
(1, 2)
Mon Jan 24 12:16:07 2005
>>> @curry(verbose=True, y=444)
... def bar(x=3, y=4):
... return x*y
...
presets: -- "name(?)" means name may be unused
y = 444
>>> bar(2)
888
>>> bar(2, 3)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: bar() takes at most 1 argument (2 given)
>>> bar()
1332
>>> import dis
>>> dis.dis(bar)
1 0 LOAD_CONST 1 (444)
3 STORE_FAST 1 (y)
3 6 LOAD_FAST 0 (x)
9 LOAD_FAST 1 (y)
12 BINARY_MULTIPLY
13 RETURN_VALUE
>>> dis.dis(foo)
1 0 LOAD_CONST 1 ((1, 2, 'Mon Jan 24 12:16:07 2005'))
3 UNPACK_SEQUENCE 3
6 STORE_FAST 0 (a)
9 STORE_FAST 1 (b)
12 STORE_FAST 2 (deftime)
3 15 LOAD_FAST 0 (a)
18 LOAD_FAST 1 (b)
21 BUILD_TUPLE 2
24 PRINT_ITEM
25 PRINT_NEWLINE
4 26 LOAD_FAST 2 (deftime)
29 PRINT_ITEM
30 PRINT_NEWLINE
31 LOAD_CONST 0 (None)
34 RETURN_VALUE
Now I have to see whether I can optimize the result with Raymond's
make_constants
as two decorators in a row... (pre without keyword args is an alias for
Raymond's make_constants,
just handy for the moment)
>>> from pre import pre
>>> @pre(verbose=True)
... @presets(verbose=True, a=1, b=2, deftime=__import__('time').ctime())
... def foo():
... print (a, b)
... print deftime
... print __name__
...
presets: -- "name(?)" means name may be unused
a = 1
b = 2
deftime = 'Mon Jan 24 12:29:21 2005'
__name__ --> __main__
>>> foo()
(1, 2)
Mon Jan 24 12:29:21 2005
__main__
>>> dis.dis(foo)
1 0 LOAD_CONST 1 ((1, 2, 'Mon Jan 24 12:29:21 2005'))
3 UNPACK_SEQUENCE 3
6 STORE_FAST 0 (a)
9 STORE_FAST 1 (b)
12 STORE_FAST 2 (deftime)
3 15 LOAD_FAST 0 (a)
18 LOAD_FAST 1 (b)
21 BUILD_TUPLE 2
24 PRINT_ITEM
25 PRINT_NEWLINE
4 26 LOAD_FAST 2 (deftime)
29 PRINT_ITEM
30 PRINT_NEWLINE
5 31 LOAD_CONST 2 ('__main__')
34 PRINT_ITEM
35 PRINT_NEWLINE
36 LOAD_CONST 0 (None)
39 RETURN_VALUE
Regards,
Bengt Richter
--
http://mail.python.org/mailman/listinfo/python-list
