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Groups > comp.lang.python > #111117
| From | Gregory Ewing <greg.ewing@canterbury.ac.nz> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Improved nestedmodule decorator implementation |
| Date | 2016-07-05 21:31 +1200 |
| Message-ID | <du1d4aFebp4U1@mid.individual.net> (permalink) |
| References | (6 earlier) <577b2af3$0$1611$c3e8da3$5496439d@news.astraweb.com> <CAPTjJmoU=iRkn3PmeOxk9+=vuuvVzO-CQrd_TtXF52Bjq-Vr9Q@mail.gmail.com> <mailman.82.1467690470.2295.python-list@python.org> <577b4f06$0$2752$c3e8da3$76491128@news.astraweb.com> <du1brpFe32qU1@mid.individual.net> |
I wrote:
> The only shortcoming I can think of is that a nestedmodule
> inside another nestedmodule won't be able to see the names
> in the outer nestedmodule
Actually, that's not correct -- the version I posted before
actually crashes if you try to refer to a name in an outer
nestedmodule from an inner nestedmodule.
Here's an improved version that fully supports nesting to
any depth.
% python3 test_nested_nested.py
foo
blarg
#------------------------------------------
#
# test_nested_nested.py
#
#------------------------------------------
from nestedmodule import nestedmodule
@nestedmodule
def m1():
def foo():
print("foo")
@nestedmodule
def m2():
def blarg():
foo()
print("blarg")
m1.m2.blarg()
#------------------------------------------
#
# nestedmodule.py
#
#------------------------------------------
from types import CodeType, FunctionType, ModuleType
from dis import dis
def hack_code(f):
"""Hack 'return locals()' onto the end of the bytecode of f."""
code1 = f.__code__
bytes1 = code1.co_code
names1 = code1.co_names
n = len(names1)
names2 = names1 + ('locals',)
bytes2 = bytes1[:-4] + bytes([116, n, 0, 131, 0, 0, 83])
code2 = CodeType(code1.co_argcount, code1.co_kwonlyargcount, code1.co_nlocals,
code1.co_stacksize, code1.co_flags, bytes2, code1.co_consts, names2,
code1.co_varnames, code1.co_filename, code1.co_name, code1.co_firstlineno,
code1.co_lnotab, code1.co_freevars, code1.co_cellvars)
f2 = FunctionType(code2, f.__globals__, f.__name__, f.__kwdefaults__,
f.__closure__)
return f2
def nestedmodule(f):
f2 = hack_code(f)
l = f2()
m = ModuleType(f.__name__)
m.__dict__.update(l)
return m
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Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-02 00:13 +1000
Re: Namespaces are one honking great idea Random832 <random832@fastmail.com> - 2016-07-01 10:40 -0400
Re: Namespaces are one honking great idea BartC <bc@freeuk.com> - 2016-07-01 15:49 +0100
Re: Namespaces are one honking great idea Chris Angelico <rosuav@gmail.com> - 2016-07-02 03:13 +1000
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-02 03:46 +1000
Re: Namespaces are one honking great idea Rustom Mody <rustompmody@gmail.com> - 2016-07-01 19:26 -0700
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-01 09:00 -0700
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-02 03:10 +1000
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-01 12:29 -0700
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-02 11:07 +1000
Re: Namespaces are one honking great idea Kevin Conway <kevinjacobconway@gmail.com> - 2016-07-02 01:50 +0000
Re: Namespaces are one honking great idea Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-01 19:55 -0700
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-03 13:22 +1000
Re: Namespaces are one honking great idea Random832 <random832@fastmail.com> - 2016-07-02 00:59 -0400
Re: Namespaces are one honking great idea Kevin Conway <kevinjacobconway@gmail.com> - 2016-07-02 15:34 +0000
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-03 13:44 +1000
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-02 22:14 -0700
Re: Namespaces are one honking great idea Kevin Conway <kevinjacobconway@gmail.com> - 2016-07-03 22:02 +0000
Re: Namespaces are one honking great idea Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-03 16:21 -0700
Re: Namespaces are one honking great idea BartC <bc@freeuk.com> - 2016-07-04 01:19 +0100
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-03 21:01 -0700
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-02 16:28 -0700
Re: Namespaces are one honking great idea Chris Angelico <rosuav@gmail.com> - 2016-07-04 21:37 +1000
Re: Namespaces are one honking great idea Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-04 15:09 -0700
Re: Namespaces are one honking great idea Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-04 15:11 -0700
Re: Namespaces are one honking great idea jmp <jeanmichel@sequans.com> - 2016-07-04 17:58 +0200
Re: Namespaces are one honking great idea Chris Angelico <rosuav@gmail.com> - 2016-07-05 12:58 +1000
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-05 13:35 +1000
Re: Namespaces are one honking great idea Chris Angelico <rosuav@gmail.com> - 2016-07-05 13:47 +1000
Re: Namespaces are one honking great idea Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-07-05 16:09 +1000
A nestedmodule decorator (Re: Namespaces are one honking great idea) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-05 21:10 +1200
Improved nestedmodule decorator implementation Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-05 21:31 +1200
Re: Improved nestedmodule decorator implementation Steven D'Aprano <steve@pearwood.info> - 2016-07-05 20:54 +1000
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-05 12:34 +1000
Re: Namespaces are one honking great idea jmp <jeanmichel@sequans.com> - 2016-07-04 13:23 +0200
Re: Namespaces are one honking great idea carlosjosepita@gmail.com - 2016-07-09 07:05 -0700
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