Re: [HTCondor-users] How can I run condor_history from a file using the python bindings?

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

On 10/2/2020 3:37 AM, jcaballero.hep@xxxxxxxxx wrote:

> [1]
> import classad
> import os
> fd = os.popen("condor_history -l -file /root/history")
> ads = classad.parseOldAds(fd)
> for ad in ads: print ad['ClusterId']
>
>     
    
    Hi Jose,
    
    Couple notes re the above:
    
    Note that "parseOldAds()" method has been deprecated in favor of
    "parseAds()".
    
    Also note there is no need popen the condor_history command-line
    tool, since the HTCondor history file is just a sequence 
    of classads (in 'old' serial format) separated by a line starting
    with asterisks.  So using a Python generator function to delimit
    these on the fly, you could achieve the same thing as your example
    above with the following code:
    
       import classad
         # Handy one-line generator function to read in an HTCondor
      history file
         history_file = lambda file: ("\n" if line.startswith("***")
      else line for line in open(file,'r'))
         # Convert history file to an iterator of ClassAds
         ads =
classad.parseAds(history_file("/root/history"),parser=classad.Parser.Old)
         # Print something out per ad...
         for ad in ads: print(ad['ClusterId'])
    
    Finally note the above was done in Python 3 (I am purging Python 2
    from my brain cells) using HTCondor v8.9.8...
    
    Hope the above helps,
    regards,
    Todd