Re: [HTCondor-users] What is the proper way to insert expressions into classads using the python bindings?

[Brian Bockelman <bbockelm@xxxxxxxxxxx>]

Hi Tony,

$(Cluster) and $(Process) are a good example of the differences between ClassAds and condor submit file language.  Unfortunately, macro expansion, while very useful, does not exist in ClassAds in a manner analogous to the submit file.

You'll want something along these lines:

ad["UserLog"] = classad.ExprTree('strcat("foo", ClusterID, ".", ProcID, ".out")')

Brian

On Jul 22, 2013, at 10:12 AM, Anthony Tiradani <tiradani@xxxxxxxx> wrote:

> Hi,
> 
> I have been checking out the python bindings and I have run into a problem inserting expressions into the submit classads with python bindings.  In a standard condor submit file I generally specify output and log files with the $(Cluster) and $(Process) expressions in the file names so that I can link the files to the jobs.
> 
> For example:
> 
> log     = $(Cluster).$(Process).out
> 
> When I instruct condor_submit to dump the classad rather than perform the submit, I see the output line translated to:
> 
> UserLog = "/path/to/submit/directory/..log"
> 
> When using the python bindings to submit a job, the "..log" syntax generates a file named "..log".  I have tried the following combinations without success:
> 
> ad["UserLog"] = "$(ClusterId).$(ProcId).log"
>    - results in a file named $(ClusterId).$(ProcId).log
> 
> ad["UserLog"] = classad.ExprTree("$(ClusterId).$(ProcId).log")
>    - results in "SyntaxError: Unable to parse string into a ClassAd."
> 
> ad["UserLog"] = "%s.%s.log" % (str(classad.ExprTree("ClusterId")), str(classad.ExprTree("ProcId")))
>    - results in a file named  ClusterId.ProcId.out
> 
> ad["UserLog"] = "%s.%s.log" % (str(classad.ExprTree("$(ClusterId)")), str(classad.ExprTree("$(ProcId)")))
>    - results in "SyntaxError: Unable to parse string into a ClassAd."
> 
> ad["UserLog"] = "%s.%s.log" % (str(classad.ExprTree("$$(ClusterId)")), str(classad.ExprTree("$$(ProcId)")))
>    - results in "SyntaxError: Unable to parse string into a ClassAd."
> 
> What is the proper way to insert expressions into classads using the python bindings?
> 
> Thanks,
> 
> -- 
> Anthony Tiradani
> tiradani@xxxxxxxx
> +1 630 840 4479
> 
> 
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