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Re: [HTCondor-users] Python query: boost error

Hi Brendan,

The Python bindings that get installed via pip were statically linked with boost when they were built, so changing boost on your system shouldn't have an impact on this issue. I notice that your error points to a system-level pip install. Was HTCondor also installed on this machine by other means (e.g. yum/apt)?

I haven't been able to reproduce this in a Python 3.6 REPL (inside an otherwise bare Anaconda environment on CentOS 7), is there any other context we might be missing?

(py36) [jcpatton@submit2 ~]$ python -V
Python 3.6.13 :: Anaconda, Inc.
(py36) [jcpatton@submit2 ~]$ pip install htcondor==9.3.0
Collecting htcondor==9.3.0
  Using cached htcondor-9.3.0-cp36-cp36m-manylinux_2_5_x86_64.manylinux1_x86_64.whl (31.0 MB)
Installing collected packages: htcondor
Successfully installed htcondor-9.3.0
(py36) [jcpatton@submit2 ~]$ python
Python 3.6.13 |Anaconda, Inc.| (default, Jun  4 2021, 14:25:59)
[GCC 7.5.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import classad
>>> import htcondor
>>> coll = htcondor.Collector()
>>> ads = coll.query(htcondor.AdTypes.Schedd, "true", ["Name"])
>>> len(ads)
>>> ads[0]
[ Name = "<snipped>.wisc.edu" ]

Jason Patton

On 11/17/21 10:50 AM, Brendan Holmes wrote:



Iâm seeing a boost error when trying to run a query:


import classad

import htcondor

coll = htcondor.Collector()

coll.query(htcondor.AdTypes.Schedd, 'true', ['Name'])


----> 1 coll.query(htcondor.AdTypes.Schedd, 'true', ['Name'])

/usr/lib64/python3.6/site-packages/htcondor/_lock.py in wrapper(*args, **kwargs)

     67             acquired = LOCK.acquire()


---> 69             rv = func(*args, **kwargs)


     71             # if the function returned a context manager,


TypeError: No to_python (by-value) converter found for C++ type: boost::shared_ptr<ClassAdWrapper>



Apparently this was introduced by a breaking change in boost v1.60, but Iâve tried installing various versions of boost, older and newer than this and are getting the same issue.  Classad is v0.4.1 and htcondor is v9.3.0.  I installed using pip install htcondor


Any ideas?  Many thanks,


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