ImportError while doing import mapnik in Python, in Ubuntu 15.10

[andxwl1]

In Ubuntu 15.10:

1 install python-mapnik with:

sudo apt-get install python-mapnik

2 in a Python console, execute:

import mapnik

Expected result: mapnik module is imported.

Result:

  File "/usr/lib/python2.7/dist-packages/mapnik/__init__.py", line 74, in <module>
    from ._mapnik import *
ImportError: /usr/lib/python2.7/dist-packages/mapnik/_mapnik.x86_64-linux-gnu.so: undefined symbol: _ZN6mapnik6filter19parse_image_filtersERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERSt6vectorINS_4util7variantIJNS0_4blurENS0_4grayENS0_14agg_stack_blurENS0_6embossENS0_7sharpenENS0_11edge_detectENS0_5sobelENS0_10x_gradientENS0_10y_gradientENS0_6invertENS0_10scale_hslaENS0_14colorize_alphaENS0_14color_to_alphaEEEESaISP_EE

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: python-mapnik 1:0.0~20150817-da1d9dd-1
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Oct 27 12:05:30 2015
InstallationDate: Installed on 2015-03-11 (230 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
ProcEnviron:
 LANGUAGE=it
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: python-mapnik
UpgradeStatus: Upgraded to wily on 2015-10-25 (1 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Kevin Kenny (kennykb)]

Demangling the failed import:

ImportError: /usr/lib/python2.7/dist-packages/mapnik/_mapnik.x86_64-linux-gnu.so: undefined symbol: mapnik::filter::parse_image_filters(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::vector<mapnik::util::variant<mapnik::filter::blur, mapnik::filter::gray, mapnik::filter::agg_stack_blur, mapnik::filter::emboss, mapnik::filter::sharpen, mapnik::filter::edge_detect, mapnik::filter::sobel, mapnik::filter::x_gradient, mapnik::filter::y_gradient, mapnik::filter::invert, mapnik::filter::scale_hsla, mapnik::filter::colorize_alpha, mapnik::filter::color_to_alpha>, std::allocator<mapnik::util::variant<mapnik::filter::blur, mapnik::filter::gray, mapnik::filter::agg_stack_blur, mapnik::filter::emboss, mapnik::filter::sharpen, mapnik::filter::edge_detect, mapnik::filter::sobel, mapnik::filter::x_gradient, mapnik::filter::y_gradient, mapnik::filter::invert, mapnik::filter::scale_hsla, mapnik::filter::colorize_alpha, mapnik::filter::color_to_alpha> > >&)

[andxwl1 (andxwl1)]

xreal on #mapnik irc suggests to check if this is related to https://github.com/mapnik/python-mapnik/issues/62

[andxwl1 (andxwl1)]

Speaking about #4
I changed mapniklibpath = '/usr/lib/mapnik' to mapniklibpath = '/usr/lib/mapnik/3.0' in /usr/lib/python2.7/dist-packages/mapnik
But the error is still there.

[GautierPortet (kassoulet)]

This is the symbol looked by python-mapnik:
_ZN6mapnik6filter19parse_image_filtersERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERSt6vectorINS_4util7variantIJNS0_4blurENS0_4grayENS0_14agg_stack_blurENS0_6embossENS0_7sharpenENS0_11edge_detectENS0_5sobelENS0_10x_gradientENS0_10y_gradientENS0_6invertENS0_10scale_hslaENS0_14colorize_alphaENS0_14color_to_alphaEEEESaISP_EE

This is the closest symbol in /usr/lib/libmapnik.so.3.0:
_ZN6mapnik6filter19parse_image_filtersERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERSt6vectorINS_4util7variantIINS0_4blurENS0_4grayENS0_14agg_stack_blurENS0_6embossENS0_7sharpenENS0_11edge_detectENS0_5sobelENS0_10x_gradientENS0_10y_gradientENS0_6invertENS0_10scale_hslaENS0_14colorize_alphaENS0_14color_to_alphaENS0_21color_blind_protanopeENS0_23color_blind_deuteranopeENS0_21color_blind_tritanopeEEEESaISS_EE

Looks like color_blind_* are missing, probably not compiled with the right version?

[GautierPortet (kassoulet)]

Rebuilding the source package fixed it for me.

[Hartmut Holzgraefe (hartmut-php)]

Similar problem here, but I'm getting "generate_image_filters" instead of "parse_image_filters" in the error message:

$ cat test.py
import mapnik

$ python test.py
Traceback (most recent call last):
  File "test.py", line 4, in <module>
    import mapnik
  File "/usr/lib/python2.7/dist-packages/mapnik/__init__.py", line 74, in <module>
    from ._mapnik import *
ImportError: /usr/lib/python2.7/dist-packages/mapnik/_mapnik.i386-linux-gnu.so: undefined symbol: _ZN6mapnik6filter22generate_image_filtersERSt20back_insert_iteratorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEERKSt6vectorINS_4util7variantIJNS0_4blurENS0_4grayENS0_14agg_stack_blurENS0_6embossENS0_7sharpenENS0_11edge_detectENS0_5sobelENS0_10x_gradientENS0_10y_gradientENS0_6invertENS0_10scale_hslaENS0_14colorize_alphaENS0_14color_to_alphaEEEESaISQ_EE

$ c++filt
_ZN6mapnik6filter22generate_image_filtersERSt20back_insert_iteratorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEERKSt6vectorINS_4util7variantIJNS0_4blurENS0_4grayENS0_14agg_stack_blurENS0_6embossENS0_7sharpenENS0_11edge_detectENS0_5sobelENS0_10x_gradientENS0_10y_gradientENS0_6invertENS0_10scale_hslaENS0_14colorize_alphaENS0_14color_to_alphaEEEESaISQ_EE
mapnik::filter::generate_image_filters(std::back_insert_iterator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&, std::vector<mapnik::util::variant<mapnik::filter::blur, mapnik::filter::gray, mapnik::filter::agg_stack_blur, mapnik::filter::emboss, mapnik::filter::sharpen, mapnik::filter::edge_detect, mapnik::filter::sobel, mapnik::filter::x_gradient, mapnik::filter::y_gradient, mapnik::filter::invert, mapnik::filter::scale_hsla, mapnik::filter::colorize_alpha, mapnik::filter::color_to_alpha>, std::allocator<mapnik::util::variant<mapnik::filter::blur, mapnik::filter::gray, mapnik::filter::agg_stack_blur, mapnik::filter::emboss, mapnik::filter::sharpen, mapnik::filter::edge_detect, mapnik::filter::sobel, mapnik::filter::x_gradient, mapnik::filter::y_gradient, mapnik::filter::invert, mapnik::filter::scale_hsla, mapnik::filter::colorize_alpha, mapnik::filter::color_to_alpha> > > const&)

[Bas Couwenberg (sebastic)]

Should be fixed with python-mapnik (1:0.0~20151125-92e79d2-1) in xenial.