John Machin wrote:
<snip>
Good questions. Short answer ... probably 'cause I've not thought the
problem though completely :)
> You are updating with *everything* in the 'more' module, not just the
> functions. This includes such things as __name__, __doc__, __file__.
> Could have interesting side-effects.
>
> One quick silly question: why do you want to do this anyway?
>
I'm writing a "simple" macro expander. I've got some mainline code which
reads an input file, parses out macros, and expands them. So, in my
input file I might have something like:
a fjas j kj sdklj sdkl jfsdkl [ link somewhere sometext ]
So, I need a function link() to evaluate and return "http://....";
Instead of putting funcs like link() in my mainline I've stuck them in a
module of their own. In the mainline I
import funcs
and then when I need to expand I have the following code:
if not cmd in vars(funcs):
error("Unknown function/variable '%s'" % cmd)
if type(vars(funcs)[cmd]) == type(parse):
txt = eval("""funcs.%s("%s")""" % (cmd, arg))
else: # not a func, just expand the variable
if arg:
error("Argument to variable '%s' not permitted." % cmd)
txt = str(eval("funcs.%s" % cmd ))
Of course, the question comes up ... what if a user (probably me) wants
to add more functions? Easy enough to just edit funcs.py I suppose, but
I thought it'd be nice to use more modules.
So, I suppose that rather than adding the 2ndary module stuff to the
default 'funcs.py' I could just as well have a look and check for the
needed function in all the modules I've imported.
Sorry, *two* quick silly questions: are the add-on modules under your
control, or do you want to be able to do this with arbitrary modules?
[If under your control, you could insist that such modules had an
__all__ attribute with appropriate contents]
Why would I want to do that ... and how?
A third: why do you want to import into an existing namespace? Now
that you know about __import__, why just not call the functions where
they are?
Yeah, that would probably be cleaner (safer).
Thanks.
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