[Libguestfs] python 3 bindings on libguestfs

Wed Jan 31 09:09:11 UTC 2018

Hi,

We have done on fresh instance.

We have manually installed libguestfs-1.32.10.
I could see below log while running ./configure:

checking Python version... 3.6
checking for PYTHON... yes
checking Python prefix... /opt/python/x86_64/3.6.3-1
checking for Python site-packages path... /opt/python/x86_64/3.6.3-1/lib/python3.6/site-packages
checking for Python extension suffix (PEP-3149)... .cpython-36m-x86_64-linux-gnu.so
checking for PyCapsule_New in -lc... no
checking for PyString_AsString in -lc... no
checking for ruby... ruby
checking for rake... no

It seems like still " checking for PyString_AsString in -lc... no".

Please find below details while we run ./run python the issue is different:

[root at euca-10-254-5-21 libguestfs-1.32.10]$ ./run python
Python 3.6.3 (default, Nov 29 2017, 09:19:34)
[GCC 4.8.2 20140120 (Red Hat 4.8.2-16)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import guestfs
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/var/fpwork/libguestfs/libguestfs-1.32.10/python/guestfs.py", line 73, in <module>
    import libguestfsmod
ImportError: /var/fpwork/libguestfs/libguestfs-1.32.10/python/.libs/libguestfsmod.cpython-36m-x86_64-linux-gnu.so: undefined symbol: PyCObject_FromVoidPtrAndDesc
>>>

Please let me know why this issues is coming again and again.
Even google itself nothing is there to resolve the same.

Please find below steps which we are using to install libguestfs:

./configure --disable-appliance --disable-daemon --without-libvirt --with-qemu="qemu-kvm qemu-system-x86_64 qemu" --prefix=/home_local/libguestfs/1.32.0/ --enable-python

Please help me on this.

Regards,
Abinaya

-----Original Message-----
From: Richard W.M. Jones [mailto:rjones at redhat.com]
Sent: Tuesday, January 30, 2018 9:00 PM
To: Abinaya Sandhiya Manikandan (GIS) <abinaya.manikandan at wipro.com>
Cc: libguestfs at redhat.com
Subject: Re: [Libguestfs] python 3 bindings on libguestfs

** This mail has been sent from an external source **

The interesting line is this one ...

  checking for PyString_AsString in -lc... no

and if you compare that to the code, eg in python/guestfs-py.c:

#ifdef HAVE_PYSTRING_ASSTRING
  PyDict_SetItemString (dict, "ftyp",
                        PyString_FromStringAndSize (&dirent->ftyp, 1)); #else
  PyDict_SetItemString (dict, "ftyp",
                        PyUnicode_FromStringAndSize (&dirent->ftyp, 1)); #endif

So it shouldn't be using that function (PyString_FromStringAndSize) at all.

I think most likely you've either attached the wrong log, or it's loading libguestfsmod.so from another build of libguestfs (eg. one linked with Python 2) so it might be you still have the wrong PYTHONPATH.

Suggest removing all other copies of libguestfs, or even restarting from a completely fresh install.

Rich.

--
Richard Jones, Virtualization Group, Red Hat https://clicktime.symantec.com/a/1/WGcqPOLaJikB8IRxVRgKdjKHzb5Tz7RycWNOg9wh-BA=?d=PeWFmlM2QiXWrRQf_mWIRNX9YypoxGfJyDKwe2CO3IUZHkv0LGSVuMQrgnN9RiJcBGgwnxVvYsXpGiQQdAvIPeoRSKGPKtDcyoYQPxi0DZdWwKWZdyeUPQZP6F8XlLOXZkWI9F1sozbTL1Ejou0XMfpoCO2LZOX93_6TxiAA7EBIA801R4fngc0CEVSAgxTv0jOJdhMwLDTB_U1GCP5W6hU7miZM-Qjn0eP8k2kMsJeyOCHBgqs_uy6ipAHxUOlyIGU8rrMiB33tbRxo0p_Xp3Eo11SkOIhKAiaxavQxc0-TNiis_-3xNhNLdM2MVulodPmW8uUJgxrbeXisrktPcr5WHwtRS38q02u20d9SUUGSVYmlHdTgRA%3D%3D&u=http%3A%2F%2Fpeople.redhat.com%2F~rjones
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