Ubuntu – Import python bindings for meta Tracker introspection

pythonsearchtracker

When I try to run the metaTracker introspection examples or import the Tracker module in iPython console I get an import error. Googling for this particular error message doesn't turn up anything except the patch that created these supposedly working examples for meta Tracker in 2012.

Python 2.7.4 (default, Apr 19 2013, 18:28:01) 
IPython 0.13 -- An enhanced Interactive Python.

In [1]: import gi
In [2]: from gi.repository import Tracker, GObject
ERROR:root:Could not find any typelib for Tracker
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-2-0b29c3277539> in <module>()
----> 1 from gi.repository import Tracker, GObject

ImportError: cannot import name Tracker

And what is a typelib and how do I install or import one for Tracker?

Best Answer

To search for any libraries that might be needed for tracker I did:

sudo apt-cache search tracker | grep meta

which turned up the following leads:

libtracker-sparql-0.14-0 - metadata database, indexer and search tool - library
libtracker-sparql-0.14-dev - metadata database, indexer and search tool - development files
libtracker-sparql-doc - metadata database, indexer and search tool - API documentation
mktorrent - simple command line utility to create BitTorrent metainfo files
tracker - metadata database, indexer and search tool
tracker-dbg - metadata database, indexer and search tool - debugging symbols
tracker-explorer - metadata database, indexer and search tool - developer tool
tracker-extract - metadata database, indexer and search tool - metadata extractors
tracker-gui - metadata database, indexer and search tool - GNOME frontends
tracker-miner-fs - metadata database, indexer and search tool - filesystem indexer
tracker-utils - metadata database, indexer and search tool - commandline tools

I'd already done a sudo apt-get install tracker* so I wasn't missing any of the core utilities or debug symbols so the next obvious lead was...

sudo apt-get install libtracker-*

which installed ever thing I could possibly need:

The following NEW packages will be installed:
  gir1.2-tracker-0.14 libtracker-extract-0.14-dev libtracker-extract-doc libtracker-miner-0.14-dev libtracker-miner-doc libtracker-sparql-0.14-dev libtracker-sparql-doc

and fixed the import error:

Python 2.7.4 (default, Apr 19 2013, 18:28:01) 
IPython 0.13 -- An enhanced Interactive Python.

In [1]: import gi
In [2]: from gi.repository import Tracker, GObject
In [3]: %run tracker/examples/introspection/python/all-async.py
('http://www.semanticdesktop.org/ontologies/2007/03/22/nco#default-contact-me', 75L)
('http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#roi-content-face', 73L)
('http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#roi-content-pet', 72L)
('http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#roi-content-focus', 74L)
('http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#roi-content-barcode', 76L)
('http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#roi-content-undefined', 78L)

Related Solutions

Ubuntu – How to install the gedit markdown-preview plugin on 14.04

This plugin is written for Python 2, but since gedit 3.8, only Python 3 plugins are supported. So some small changes are required.

Modify the installer (gedit-markdown.sh) to install the python3 markdown module:

This is a patch that you can apply on the existing file (or you can just copy the full modified version available here):

--- gedit-markdown_ori.sh   2014-05-14 16:14:58.386700310 +0200
+++ gedit-markdown.sh   2014-05-14 15:42:21.038783248 +0200
@@ -263,7 +263,9 @@

 # Note: sous Archlinux, «/usr/bin/python» correspond à Python 3. On teste donc les
 # chemins pour Python 2 en premier.
-if type -p python2.7 > /dev/null; then
+if type -p python3 > /dev/null; then
+   binPython=$(type -p python3)
+elif type -p python2.7 > /dev/null; then
    binPython=$(type -p python2.7)
 elif type -p python2.6 > /dev/null; then
    binPython=$(type -p python2.6)
@@ -287,15 +289,15 @@
            cheminPythonMarkdown=python-markdown/python2
            cheminPythonSitePackages=$("$binPython" -m site --user-site)
        fi
-#  elif [[ ${versionPython:0:1} == 3 ]]; then
-#      compareVersions "$versionPython" "3.1"
-#      
-#      if [[ $? == 2 ]]; then
-#          bonneVersionPython=false
-#      else
-#          cheminPythonMarkdown=python-markdown/python3
-#          cheminPythonSitePackages=$("$binPython" -m site --user-site)
-#      fi
+   elif [[ ${versionPython:0:1} == 3 ]]; then
+       compareVersions "$versionPython" "3.1"
+       
+       if [[ $? == 2 ]]; then
+           bonneVersionPython=false
+       else
+           cheminPythonMarkdown=python-markdown/python3
+           cheminPythonSitePackages=$("$binPython" -m site --user-site)
+       fi
    else
        bonneVersionPython=false
    fi

Run ./gedit-markdown.sh install

You should see python 3.4 instead of 2.7:

############################################################
##
## Installation of gedit-markdown
##
############################################################

## First step: check dependencies

- gedit: 3.10.4
- Python: 3.4

[...]

Change the plugin loader to python3

Replace /home/aarold/.local/share/gedit/plugins/markdown-preview.plugin with:

[Plugin]
Loader=python3
Module=markdown-preview
IAge=3
Name=Markdown Preview
Name[fr]=Aperçu Markdown
Description=Show the HTML version of the Markdown text you're editing
Description[fr]=Affiche l'aperçu en HTML du document Markdown en cours d'édition
Authors=Michele Campeotto <micampe@micampe.it>\nJean-Philippe Fleury <contact@jpfleury.net>
Copyright=Copyright © 2005, 2006 Michele Campeotto\nCopyright © 2009, 2011-2012 Jean-Philippe Fleury
Website=http://www.jpfleury.net/logiciels/gedit-markdown.php

Convert /home/aarold/.local/share/gedit/plugins/markdown-preview/__init__.py to python3:

Run:
```
2to3 -w /home/aarold/.local/share/gedit/plugins/markdown-preview/__init__.py
```
Finally open this file and edit line 86 (remove the binary mode, "wb" -> "w"):
```
with open(confFile, "w") as confFile:
```
Activate the plugin in Gedit as you did.

Ubuntu – configure tkinter for python3.4.2

In order to build python3.4.2 from source with the _tkinter module you need to install the following build dependency:

sudo apt-get install tk8.6-dev

Then all you have to do is running make again to add _tkinter support as the setup.py file will automatically detect the tk/tcl headers and create the module:

~/Downloads/Python-3.4.2$ make
running build
running build_ext
building '_tkinter' extension
gcc -pthread -fPIC -Wno-unused-result -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -Werror=declaration-after-statement -DWITH_APPINIT=1 -I/usr/include/tcl8.6 -I/usr/X11/include -I./Include -I. -IInclude -I/usr/include/x86_64-linux-gnu -I/usr/local/include -I/home/sylvain/Downloads/Python-3.4.2/Include -I/home/sylvain/Downloads/Python-3.4.2 -c /home/sylvain/Downloads/Python-3.4.2/Modules/_tkinter.c -o build/temp.linux-x86_64-3.4/home/sylvain/Downloads/Python-3.4.2/Modules/_tkinter.o
gcc -pthread -fPIC -Wno-unused-result -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -Werror=declaration-after-statement -DWITH_APPINIT=1 -I/usr/include/tcl8.6 -I/usr/X11/include -I./Include -I. -IInclude -I/usr/include/x86_64-linux-gnu -I/usr/local/include -I/home/sylvain/Downloads/Python-3.4.2/Include -I/home/sylvain/Downloads/Python-3.4.2 -c /home/sylvain/Downloads/Python-3.4.2/Modules/tkappinit.c -o build/temp.linux-x86_64-3.4/home/sylvain/Downloads/Python-3.4.2/Modules/tkappinit.o
gcc -pthread -shared build/temp.linux-x86_64-3.4/home/sylvain/Downloads/Python-3.4.2/Modules/_tkinter.o build/temp.linux-x86_64-3.4/home/sylvain/Downloads/Python-3.4.2/Modules/tkappinit.o -L/usr/X11/lib -L/usr/lib/x86_64-linux-gnu -L/usr/local/lib -ltk8.6 -ltcl8.6 -lX11 -o build/lib.linux-x86_64-3.4/_tkinter.cpython-34m.so

Python build finished successfully!
The necessary bits to build these optional modules were not found:
_bz2                  _dbm                  _gdbm              
_lzma                 _sqlite3                                 
To find the necessary bits, look in setup.py in detect_modules() for the module's name.
[...]

Now you can import tkinter in python3.4.2:

~/Downloads/Python-3.4.2$ ./python 
Python 3.4.2 (default, Oct 30 2014, 11:34:17) 
[GCC 4.8.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import tkinter
>>>

Original answer:

Unless you really need python3.4.2, I would just use the default python3 version on 14.04 (3.4.0)

Then all you have to do is installaling the following packages:

sudo apt-get install python3-tk tk

And start the python interpreter this way:

/usr/bin/python3

Otherwise you'll always get the version that you installed in /usr/local (3.4.2).

Importing tk in python3 should work now:

$ python3
Python 3.4.0 (default, Apr 11 2014, 13:05:11) 
[GCC 4.8.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import tkinter
>>>

Best Answer

Related Solutions

Ubuntu – How to install the gedit markdown-preview plugin on 14.04

Ubuntu – configure tkinter for python3.4.2

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