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Re: exec and locals

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 Steven D'Aprano <steve@pearwood.info> Wrote in message:
> On Wed, 26 Feb 2014 14:46:39 +0100, Peter Otten wrote:
> 
>> Steven D'Aprano wrote:
>> 
>>> I have to dynamically generate some code inside a function using exec,
>>> but I'm not sure if it is working by accident or if I can rely on it.
>>> 
>> I eventually settled on some 
> code that works something like this:
> 
> 
> def factory():
>     blah blah blah
>     try:
>         exec("""def inner():
>                     

Before I would use exec,  I'd look hard at either generating a
 source file to import,  or using a preprocessor.  And if this
 code was to be installed,  make the version choice or the
 preprocess step happen at install time.

I once implemented a system that generated 20k lines of C++ header
 and sources. And the generated code was properly indented and
 fairly well commented. 



-- 
DaveA

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exec and locals Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-02-26 13:15 +0000
  Re: exec and locals Chris Angelico <rosuav@gmail.com> - 2014-02-27 00:40 +1100
  Re: exec and locals Peter Otten <__peter__@web.de> - 2014-02-26 14:46 +0100
    Re: exec and locals Steven D'Aprano <steve@pearwood.info> - 2014-02-27 00:25 +0000
      Re: exec and locals Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-02-27 16:34 +1300
        Re: exec and locals Steven D'Aprano <steve@pearwood.info> - 2014-02-27 04:39 +0000
          Re: exec and locals Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-02-28 00:29 +1300
            Re: exec and locals Chris Angelico <rosuav@gmail.com> - 2014-02-27 22:41 +1100
            Re: exec and locals Steven D'Aprano <steve@pearwood.info> - 2014-02-28 01:49 +0000
      Re: exec and locals Dan Sommers <dan@tombstonezero.net> - 2014-02-27 03:47 +0000
      Re: exec and locals Dave Angel <davea@davea.name> - 2014-02-26 23:20 -0500
        Re: exec and locals Steven D'Aprano <steve@pearwood.info> - 2014-02-27 04:47 +0000
          Re: exec and locals Chris Angelico <rosuav@gmail.com> - 2014-02-27 16:05 +1100
  Re: exec and locals Peter Otten <__peter__@web.de> - 2014-02-26 14:55 +0100
  Re: exec and locals Alister <alister.ware@ntlworld.com> - 2014-02-26 14:00 +0000
    Re: exec and locals Steven D'Aprano <steve@pearwood.info> - 2014-02-27 00:31 +0000
      Re: exec and locals Alister <alister.ware@ntlworld.com> - 2014-02-27 09:59 +0000

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