Automatic import ?
in [Python]
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From: C. B. on 27 Mar 2010 18:39 > In that particular case, replace automatic by implicit, and you got the > reason why it is not a good idea. > Maybe in your case the C habits clashes to the python habits. > You're right ! As a C developer, I appreciate to only include <string.h> to deal with strings, without wondering which other header provides size_t definition. > Talking about python, if the user needs to know about BBB, then it has > to import it, perdiod. If the user needs to know about many objects, > then it has to import them all, explicitly. Ok. If this is the Python way of coding, that's ok for me. I will stop now my quest for an automatic import and work like that. The most interesting solution I have found until now is using PyImport_AppendInittab() and PyEval_GetGlobals() functions. But this also brings lots of problems (mainly namespaces and unloading). Anyway, the time spent to look for a solution was a nice way to learn Python internals :) Cheers,
From: Aahz on 10 Apr 2010 13:48
In article <4bac361d$0$8840$c3e8da3(a)news.astraweb.com>, Steven D'Aprano <steve(a)REMOVE-THIS-cybersource.com.au> wrote: >On Thu, 25 Mar 2010 18:03:58 -0700, C. B. wrote: >> >> from mymodule import AAA >> from mymodule import BBB >> >> a = AAA(BBB())) >> >> But, as there is no case where AAA can be used without BBB, I would like >> to avoid importing BBB in my Python scripts when I already import AAA. > >Since AAA must take an argument of BBB, then give it a default: > ># in mymodule >def AAA(arg=BBB()): > ... That would frequently give wrong results unless BBB is explicitly designed to create immutable instances. I strongly suggest doing the usual mutable dance: def AAA(arg=None): if arg is None: arg = BBB() -- Aahz (aahz(a)pythoncraft.com) <*> http://www.pythoncraft.com/ "It is easier to optimize correct code than to correct optimized code." --Bill Harlan |