cant install on ubuntu 16.04

[skasberger]

after executing the installation as stated in README.md, the module can not be imported into python, throwing the following error.

python -c "import mapnik"          
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/my-data/apps/python-mapnik/mapnik/__init__.py", line 74, in <module>
    from ._mapnik import *
ImportError: /my-data/apps/python-mapnik/mapnik/_mapnik.cpython-36m-x86_64-linux-gnu.so: undefined symbol: PyClass_Type

/my-data/apps/python-mapnik is the folder in which i cloned the repo.

i run

• ubuntu 16.04
• Python 3.6.3 :: Anaconda custom (64-bit)
• mapnik 3.1.0

[epifanio]

I'm having a similar issue, my log looks like:

 python3.6 -c "import mapnik; print(mapnik.__file__)"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.6/dist-packages/mapnik-0.1-py3.6-linux-x86_64.egg/mapnik/__init__.py", line 74, in <module>
    from ._mapnik import *
ImportError: /usr/local/lib/python3.6/dist-packages/mapnik-0.1-py3.6-linux-x86_64.egg/mapnik/_mapnik.cpython-36m-x86_64-linux-gnu.so: undefined symbol: PyString_Type

• I've installed mapnik from source and pyhon-mapnik following some info found here

I also have the python3.5 debian packages that works just fine, but I need to use it with my code which is in a py3.6 env.

Above was on ubuntu 16.04, xenial.

On latest ubuntu zesty from official repo I have:

Python 3.6.3 (default, Oct  3 2017, 21:45:48) 
[GCC 7.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import mapnik
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/mapnik/__init__.py", line 74, in <module>
    from ._mapnik import *
ImportError: /usr/lib/python3/dist-packages/mapnik/_mapnik.cpython-36m-x86_64-linux-gnu.so: undefined symbol: _ZTIN6mapnik15freetype_engineE
>>>

Any clue on how to fix this?

[xtompok]

I have exactly same problems.

[Djoow]

Hello guys !

Which version of g++ are you running ?

Try to upgrade g++ to version 7.2.0, then build again mapnik and python-mapnik from sources. Also be sure to choose the correct branches after cloning the repositories. I assume the latest stable release of mapnik is v.3.0.16, then before building you should do :

• git checkout v3.0.16 (for mapnik)
• git checkout v3.0.x (for python-mapnik)

In my case, it actually solved the exact same problem as @epifanio / @xtompok mentionned

[xtompok]

With the GCC-7.2 problem changes to https://github.com/mapnik/python-mapnik/issues/103 :-( I am building against self-compiled mapnik from Git.

[Djoow]

Check whether you have the latest version of Boost for python (run apt update && apt install libboost-python-dev Then try to do export BOOST_PYTHON_LIB=boost_python and re-build python-mapnik

[xtompok]

When i do export BOOST_PYTHON_LIB=boost_python, build the python-mapnik (python setup.py develop) and then try to import mapnik, it ends with 'ImportError: .../python-mapnik4/mapnik/_mapnik.cpython-35m-x86_64-linux-gnu.so: undefined symbol: PyString_Type`

[am2222]

@Djoow Hi, What If we chackout both master branches ?I could not build any other branches but the masters works fine. but 'import mapkin' command in python throws error