Catching results of an exec
lists at gregfortune.com
Wed Sep 18 18:07:17 EDT 2002
Is there any way to "catch" the value produced by an exec? I'm considering
things like print statements that don't really assign a value, but do send
a result to stdout.
For example, if I execute
from an interpreter, there will be some stuff spit out on the console.
What if I really wanted to display the list from dir() in a different way?
I'm working on a really dinky server that will sit on a machine and execute
arbitrary python code. I want the results from the code execution to be
returned to client.
Even just eval('dir()') exhibits the desired behavior, but only from an
Right now I've got a nasty hack that redirects stdout, uses an
InteractiveInterpereter from the code module to execute the code, writes to
an output file, reads the result from the file, restores stdout and then
sends the result to the client. Hopefully, that's a terrible way to do it.
It just occured to me that I can probably use a pipe in place of the
output file, but still....
It would be great if exec and eval set something somewhere that held the
results of the code execution. I looked in the InteractiveInterpreter
(which, at least, kicks the results of the code execution out to stdout),
but all it does is
exec code in self.locals
Did I miss something?
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