Installation issues

[Kam]

Hello Team,

First apologies if it's a repeat post and, if the case, would be great if you can direct me to the respected link.

I must admit that I could not find much documentation related to installation. Anyway, I am trying to install the wrapper using pip but getting the following error.

(C:\ProgramData\Anaconda3) C:\WINDOWS\system32>pip install python-weka-wrapper

Collecting python-weka-wrapper

  Downloading python-weka-wrapper-0.3.12.tar.gz (92kB)

    100% |¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦| 92kB 581kB/s

    Complete output from command python setup.py egg_info:

    Traceback (most recent call last):

      File "<string>", line 1, in <module>

      File "C:\Users\RANDU~1\AppData\Local\Temp\pip-build-vp2bx01s\python-weka-wrapper\setup.py", line 41

        except HTTPError, e:

                        ^

    SyntaxError: invalid syntax

    ----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in C:\Users\RANDU~1\AppData\Local\Temp\pip-build-vp2bx01s\python-weka-wrapper\

Any help is much appreciated!

Regards

Kam

[Peter Reutemann]

"python-weka-wrapper" is for Python 2.7, "python-weka-wrapper3" is for
Python 3. Install the latter and you shouldn't get any errors.

Cheers, Peter
--
Peter Reutemann
Dept. of Computer Science
University of Waikato, NZ
+64 (7) 858-5174
http://www.cms.waikato.ac.nz/~fracpete/
http://www.data-mining.co.nz/

[Kam]

P.S. Okay sorry I got the documentation page now and figured out that I need to install javabridge before installing the Weka wrapper. However, I am now getting the following error. Do I need a jdk installed as well?

I am on a Windows 10 machine and using Python 3.6 through Anaconda 4.4.0.  

      File "C:\Users\RANDU~1\AppData\Local\Temp\pip-build-ayu2dqd_\javabridge\javabridge\locate.py", line 162, in find_jdk

        kjdk = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, jdk_key_path)

    FileNotFoundError: [WinError 2] The system cannot find the file specified

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):

      File "<string>", line 1, in <module>

      File "C:\Users\RANDU~1\AppData\Local\Temp\pip-build-ayu2dqd_\javabridge\setup.py", line 393, in <module>

        ext_modules=ext_modules(),

      File "C:\Users\RANDU~1\AppData\Local\Temp\pip-build-ayu2dqd_\javabridge\setup.py", line 96, in ext_modules

        jdk_home = find_jdk()

      File "C:\Users\RANDU~1\AppData\Local\Temp\pip-build-ayu2dqd_\javabridge\javabridge\locate.py", line 171, in find_jdk

        except WindowsError as e:

    UnboundLocalError: local variable 'WindowsError' referenced before assignment

[Kam]

Thanks for your quick response Peter, are there any other dependencies?

Regards

Kam

[Kam]

Wrapper 3 seemed to have worked but failed again on javabridge with the error I posted above.

Regards,

Kam

[Peter Reutemann]

> P.S. Okay sorry I got the documentation page now and figured out that I need
> to install javabridge before installing the Weka wrapper. However, I am now
> getting the following error. Do I need a jdk installed as well?

Yes. As it says under "Prerequisites for all plaforms":
http://fracpete.github.io/python-weka-wrapper3/install.html#prerequisites-for-all-plaforms

Here are the instructions for Windows:
http://fracpete.github.io/python-weka-wrapper3/install.html#windows

[Roshani M S]

Hello, 

I am able to install weka wrapper on my command prompt.

But when I try to run the following on my jupyter notebook,

import weka.core.jvm as jvm

I get the below error,

JVMNotFoundError: Can't find Java Virtual Machine

Please help me resolve it 

[Peter Reutemann]

On March 9, 2018 8:28:02 PM GMT+13:00, Roshani M S <msro...@gmail.com> wrote:
>Hello,
>I am able to install weka wrapper on my command prompt.
>
>But when I try to run the following on my jupyter notebook,
>import weka.core.jvm as jvm
>
>I get the below error,
>
>JVMNotFoundError: Can't find Java Virtual Machine
>
>
>Please help me resolve it

I don't use Jupyter and I suspect that you can't get pww to work with it (mainly because the jvm can only be started once by a process and not restarted, limitation of the javabridge library that pww uses).

Just use pww within regular Python scripts. Eg use an IDE like PyCharm.