Re: need an alternative to getattr()

[Jon Ribbens]

In article <[EMAIL PROTECTED]>, [EMAIL PROTECTED] wrote:
> import heading1
> import heading2
> While True:
> heading = get_next_heading(file_ptr) # This func will return
> "heading1", then "heading2"(on next call)
> if heading = "":
> break
> getattr(heading, "process")(file_ptr) # The problem, as you would
> have noticed, is that the first
> # argument to getattr is a string!!
> 
> Is there an alternatice to getattr() that will solve my problem, or is
> there another way to do it.

  globals()[heading].process(file_ptr)

or

  sys.modules[heading].process(file_ptr)

but note that, unless you are checking 'heading' against a 'known
good configuration keywords' list beforehand, you are trusting the
author of the configuration file.
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Re: need an alternative to getattr()

[Ant]

> getattr(heading, "process")(file_ptr)
...
> Is there an alternatice to getattr() that will solve my problem, or is
> there another way to do it.

How about:

eval("%s.process(%s)" % (heading, file_ptr))

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Re: need an alternative to getattr()

[Uffe Wassmann]

I think you would benefit from looking at the ConfigParser module.
I haven't tried it yet, but it looks like a nice interface for writing
and reading configuration files.

-Uffe.

On 7 Aug 2006 07:30:41 -0700, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
> Hi,
>
> AIM: I have a config file that contains configuration under headings
> like this:
>
> heading1:
> 
> 
> heading2:
> 
> 
> ...
> ...
>
> i parse this file to get heading1, heading2, etc and then i want to
> call heading1.process(), heading2.process(), etc.
> What i am trying to do is: (this is not the exact code, it just
> represents what i am trying to do)
>
> import heading1
> import heading2
> While True:
>heading = get_next_heading(file_ptr) # This func will return
> "heading1", then "heading2"(on next call)
>if heading = "":
>break
>getattr(heading, "process")(file_ptr) # The problem, as you would
> have noticed, is that the first
> # argument to getattr is a string!!
>
> Is there an alternatice to getattr() that will solve my problem, or is
> there another way to do it.
>
> -pranav
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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need an alternative to getattr()

[[EMAIL PROTECTED]]

Hi,

AIM: I have a config file that contains configuration under headings
like this:

heading1:


heading2:


...
...

i parse this file to get heading1, heading2, etc and then i want to
call heading1.process(), heading2.process(), etc.
What i am trying to do is: (this is not the exact code, it just
represents what i am trying to do)

import heading1
import heading2
While True:
heading = get_next_heading(file_ptr) # This func will return
"heading1", then "heading2"(on next call)
if heading = "":
break
getattr(heading, "process")(file_ptr) # The problem, as you would
have noticed, is that the first
# argument to getattr is a string!!

Is there an alternatice to getattr() that will solve my problem, or is
there another way to do it.

-pranav

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