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Example code for the python-weka-wrapper project.

License: GNU General Public License v3.0

Python 100.00%

python-weka-wrapper-examples's Introduction

END OF LIFE

Python 2.7 has reached its end-of-life in 2020, you should consider using the Python 3 version of this library, as the Python 2.7 version will no longer get updates!

Examples for the Python3 version are available here.

python-weka-wrapper-examples

Example code for the Python wrapper for Weka (https://github.com/fracpete/python-weka-wrapper).

Some of the examples are modelled after the original Examples for Weka (https://svn.cms.waikato.ac.nz/svn/weka/trunk/wekaexamples/).

Requirements:

Python
python-weka-wrapper (>= 0.2.0)
JDK 1.6+

The Python libraries you can either install using pip install <name> or use pre-built packages available for your platform.

Forum

You can post questions, patches or enhancement requests in the following Google Group:

https://groups.google.com/forum/#!forum/python-weka-wrapper

IDEs

Library Setup in Eclipse PyDev

when add external library, path should stop at site-packages, and then import will work as import weka.core.jvm as jvm

working: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages
not working: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/weka

when add source folder as library, same as above, path stop at "src", then then imporit will work as "import wekaexamples.helper as helper"

working: ${PROJ_DIR_NAME}/src
not working: ${PROJ_DIR_NAME}/src/wekaexamples

python-weka-wrapper-examples's People

Contributors

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python-weka-wrapper-examples's Issues

fix jwrapper() usage

Some example files, like attribute_selection_test still use jwrapper() method call instead of property call jwrapper.

Can't import modules python-weka-wrapper from file

Hi @fracpete i have success install python-weka-wrapper...and running at REPL python...but when i tried in file.py it's always ImportError: No module named core.jvm i install with :

sudo pip install javabridge
sudo pip install python-weka-wrapper

Is your python weka wrapper examples compatible with python 2.7 ?

Hello, sorry to bother you, i am a beginner to python language, and weka. Is your python weka wrapper examples compatible with python 2.7 ? Thank you.

name 'args' is not defined

Hello, sorry again, i want to ask, why i am getting "name 'args' is not defined" error when i try to run:

load a dataset

helper.print_info("Loading train: " + args[1])
loader = Loader(classname="weka.core.converters.ArffLoader")
train = loader.load_file(args[1])
train.class_index = train.num_attributes - 1
helper.print_info("Loading test: " + args[2])
test = loader.load_file(args[2])
test.class_is_last()

from your "output_class_distribution" example.
Btw i am trying to build prediction using weka classifier. Thank you. Sorry if my question's so basic.

Wii you implement bayes net ?

I have tried this library, but when i want to try classifier bayes net is does not implement right ? maybe it's good to implement

JVMNotFoundError: Can't find the Java Virtual Machine

I want to use Weka in my python code, so I install java-wrapper python(2.7.16 ) according to https://fracpete.github.io/python-weka-wrapper/install.html and my java version is:
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)

Also, I added the JDK path to user variable PATH according to https://troubleshooter.xyz/wiki/fix-java-virtual-machine-jvm-not-found-error/

but it raise error:

   >>>import os
   >>>import traceback
   >>>import weka.core.jvm as jvm
   Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "C:\Python27\lib\site-packages\weka\core\jvm.py", line 17, in 
   <module>
    import javabridge
   File "C:\Python27\lib\site-packages\javabridge\__init__.py", line 38, in 
    <module>
    from .jutil import start_vm, kill_vm, vm, activate_awt, deactivate_awt
    File "C:\Python27\lib\site-packages\javabridge\jutil.py", line 151, in 
    <module>
    os.pathsep + os.path.join(find_javahome(), "bin")
    File "C:\Python27\lib\site-packages\javabridge\jutil.py", line 139, in 
    _find_jvm
    raise JVMNotFoundError()
    javabridge.jutil.JVMNotFoundError: Can't find the Java Virtual Machine

I am using Windows 10, Does it may be related to my Windows?
for both user variable and system variable --> JAVA_HOME=C:\Program Files\Java\jdk1.8.0_181\bin and JAVA_HOME= C:\Program Files\Java\jre1.8.0_181\bin
PATH=C:\Program Files\Java\jdk1.8.0_181\bin and PATH=C:\Program Files\Java\jre1.8.0_181\bin