Import error on ubuntu 16,04 with python gphoto2 1.8.5 - Githubissues

jim-easterbrook / python-gphoto2

Python interface to libgphoto2

GNU Lesser General Public License v3.0

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Import error on ubuntu 16,04 with python gphoto2 1.8.5 #69

Closed pepitooo closed 5 years ago

pepitooo commented 5 years ago

On a fresh new install of ubuntu 16.04, I know it's already old, but I need it. gphoto2 python version was 1.8.5 (before I forced to old one to resolve the issue)

$ gphoto2 --version gphoto2 2.5.9

Copyright (c) 2000-2015 Lutz Mueller and others

gphoto2 comes with NO WARRANTY, to the extent permitted by law. You may redistribute copies of gphoto2 under the terms of the GNU General Public License. For more information about these matters, see the files named COPYING.

This version of gphoto2 is using the following software versions and options: gphoto2 2.5.9 gcc, popt(m), exif, no cdk, aa, jpeg, readline libgphoto2 2.5.9 all camlibs, gcc, ltdl, EXIF libgphoto2_port 0.12.0 gcc, ltdl, no USB, serial without locking

$ python Python 3.5.2 (default, Nov 12 2018, 13:43:14) [GCC 5.4.0 20160609] on linux Type "help", "copyright", "credits" or "license" for more information.

import gphoto2 as gp Traceback (most recent call last): File "/home/user/app/lib/python3.5/site-packages/gphoto2/camera.py", line 25, in swig_import_helper return importlib.import_module(mname) File "/home/user/app/lib/python3.5/importlib/init.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "", line 986, in _gcd_import File "", line 969, in _find_and_load File "", line 958, in _find_and_load_unlocked File "", line 666, in _load_unlocked File "", line 577, in module_from_spec File "", line 906, in create_module File "", line 222, in _call_with_frames_removed ImportError: /home/user/app/lib/python3.5/site-packages/gphoto2/_camera.cpython-35m-x86_64-linux-gnu.so: undefined symbol: gp_camera_get_single_config

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "", line 1, in File "/home/user/app/lib/python3.5/site-packages/gphoto2/init.py", line 17, in from gphoto2.abilities_list import * File "/home/user/app/lib/python3.5/site-packages/gphoto2/abilities_list.py", line 6, in import gphoto2.camera File "/home/user/app/lib/python3.5/site-packages/gphoto2/camera.py", line 28, in _camera = swig_import_helper() File "/home/user/app/lib/python3.5/site-packages/gphoto2/camera.py", line 27, in swig_import_helper return importlib.import_module('_camera') File "/home/user/app/lib/python3.5/importlib/init.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) ImportError: No module named '_camera'

I force to used an old version and fixed the issue $ pip install -v -U --force-reinstall gphoto2==1.8.3

jim-easterbrook commented 5 years ago

I suspect python-gphoto2 has been compiled for the wrong version of libgphoto2. What's the output of pkg-config --modversion libgphoto2?

pepitooo commented 5 years ago

$ pkg-config --modversion libgphoto2 2.5.9

is it correct ?

jim-easterbrook commented 5 years ago

Yes, that looks OK. It means the python-gphoto2 installation should not expect gp_camera_get_single_config to be present.

I'll set up a virtual machine with ubuntu 16.04 and see if I can reproduce the problem.

jim-easterbrook commented 5 years ago

I've not been able to reproduce the problem so far. Can you check that when the installer builds the extensions the command line includes -DGPHOTO2_VERSION=0x020509.

Also I note you're installing in /home/user/app/lib/python3.5/site-packages/. Can you make sure there aren't other python-gphoto2 remnants e.g. in /usr/lib or similar.

pepitooo commented 5 years ago

I used a virtualenv to avoid installing lib on the main system, and to use python 3.5, it's on a ubuntu server I don't know how to check when the extension was build, can you give the full command line ?

$ mkdir test-gphoto2

$ cd test-gphoto2

$ virtualenv -p python3.5 .
Running virtualenv with interpreter /usr/bin/python3.5
Using base prefix '/usr'
New python executable in /tmp/test-gphoto2/bin/python3.5
Also creating executable in /tmp/test-gphoto2/bin/python
Installing setuptools, pkg_resources, pip, wheel...done.

$ source /tmp/test-gphoto2/bin/activate

$ pip install gphoto2
Collecting gphoto2
Installing collected packages: gphoto2
Sucusersfully installed gphoto2-1.8.5

$ python
Python 3.5.2 (default, Nov 12 2018, 13:43:14) 
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import gphoto2
Traceback (most recent call last):
  File "/tmp/test-gphoto2/lib/python3.5/site-packages/gphoto2/camera.py", line 25, in swig_import_helper
    return importlib.import_module(mname)
  File "/tmp/test-gphoto2/lib/python3.5/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 666, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 577, in module_from_spec
  File "<frozen importlib._bootstrap_external>", line 906, in create_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
ImportError: /tmp/test-gphoto2/lib/python3.5/site-packages/gphoto2/_camera.cpython-35m-x86_64-linux-gnu.so: undefined symbol: gp_camera_get_single_config

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/tmp/test-gphoto2/lib/python3.5/site-packages/gphoto2/__init__.py", line 17, in <module>
    from gphoto2.abilities_list import *
  File "/tmp/test-gphoto2/lib/python3.5/site-packages/gphoto2/abilities_list.py", line 6, in <module>
    import gphoto2.camera
  File "/tmp/test-gphoto2/lib/python3.5/site-packages/gphoto2/camera.py", line 28, in <module>
    _camera = swig_import_helper()
  File "/tmp/test-gphoto2/lib/python3.5/site-packages/gphoto2/camera.py", line 27, in swig_import_helper
    return importlib.import_module('_camera')
  File "/tmp/test-gphoto2/lib/python3.5/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
ImportError: No module named '_camera'
>>>

jim-easterbrook commented 5 years ago

Using pip install -v ... increases the verbosity so you can see the compiler commands used during installation.

pepitooo commented 5 years ago

but there is no compilation, it look like a prepuild module.

$ pip install -v gphoto2
Created temporary directory: /tmp/pip-ephem-wheel-cache-9tve0h7u
Created temporary directory: /tmp/pip-req-tracker-aa32vdyz
Created requirements tracker '/tmp/pip-req-tracker-aa32vdyz'
Created temporary directory: /tmp/pip-install-qczpyvbg
Collecting gphoto2
  1 location(s) to search for versions of gphoto2:
  * https://pypi.org/simple/gphoto2/
  Getting page https://pypi.org/simple/gphoto2/
  Looking up "https://pypi.org/simple/gphoto2/" in the cache
  Request header has "max_age" as 0, cache bypassed
  Starting new HTTPS connection (1): pypi.org:443
  https://pypi.org:443 "GET /simple/gphoto2/ HTTP/1.1" 304 0
  Analyzing links from page https://pypi.org/simple/gphoto2/
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  Using version 1.8.5 (newest of versions: 0.3.2, 0.3.3, 0.4.0, 0.5.0, 0.5.1, 0.5.2, 0.6.0, 0.7.0, 0.7.1, 0.8.0, 0.9.0, 0.9.1, 0.10.0, 0.10.1, 0.10.2, 0.11.0, 0.11.1, 0.11.2, 1.0.0, 1.1.0, 1.2.0, 1.2.1, 1.2.2, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.6.0, 1.7.0, 1.7.1, 1.8.0, 1.8.2, 1.8.3, 1.8.4, 1.8.5)
  Using cached wheel link: file:///home/ces/.cache/pip/wheels/3d/e6/65/274e0c5ac977301bef865cbb99b40267192eaeb0609bd4de05/gphoto2-1.8.5-cp35-cp35m-linux_x86_64.whl
  Added gphoto2 from file:///home/ces/.cache/pip/wheels/3d/e6/65/274e0c5ac977301bef865cbb99b40267192eaeb0609bd4de05/gphoto2-1.8.5-cp35-cp35m-linux_x86_64.whl to build tracker '/tmp/pip-req-tracker-aa32vdyz'
  Removed gphoto2 from file:///home/ces/.cache/pip/wheels/3d/e6/65/274e0c5ac977301bef865cbb99b40267192eaeb0609bd4de05/gphoto2-1.8.5-cp35-cp35m-linux_x86_64.whl from build tracker '/tmp/pip-req-tracker-aa32vdyz'
Installing collected packages: gphoto2

Successfully installed gphoto2-1.8.5
Cleaning up...
Removed build tracker '/tmp/pip-req-tracker-aa32vdyz'

jim-easterbrook commented 5 years ago

You're using a cached "wheel" that was generated by your previous installation - the download from PyPI is definitely not prebuilt. Try using the --no-cache-dir option.

jim-easterbrook commented 5 years ago

Actually this could be the cause of several installation problems. pip only knows about python versions and package versions. If a different version of libgphoto2 is installed then pip won't know it needs to rebuild from source and will reuse a cached "wheel".

pepitooo commented 5 years ago

All right, that was the issue, and it was on my side. I'm so surprised, it used a cache for a new virtualenv, Thanks a lot for your help

jim-easterbrook commented 5 years ago

I'm also surprised. pip tries to be too clever, in my opinion. Is your original import error now fixed?

jim-easterbrook commented 5 years ago

For future reference: --no-binary :all: is a more appropriate flag than --no-cache-dir.

pepitooo commented 5 years ago

Yes It's fixed, Thanks a lot