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I have installed PyML package in order to use some machine learning algorithms, and according to the tutorial, my installation is successful.

I try to run a python script which includes the following line to import modules from PyML

from PyML import datafunc,svm,assess,modelSelection,ker

However I get the error message above saying

File <stdin>, line 1, in <module> ImportError: cannot import name datafunc

cannot import name datafunc`. From terminal I check every module by saying

from PyML import datafunc, from PyML import svm, from PyML import ker

I only get error message for datafunc. The PyML library is under the site-packages folder of Python 2.7.

I check this question here Python error: ImportError: cannot import name Akismet, but I could't see how it will help my problem.

Do you have any idea why Python imports some modules but does not import this one?

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patti_jane
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1 Answers1

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In PyML-0.7.13.3, the datafunc module exists in PyML/containers directory. So it seems that you can import the module as follows:

from PyML.containers import datafunc

Howerver, it raises an error beacuse the datafunc module uses undefined classes BaseVectorDataSet and SparseDataSet.

Thus you need to modify the source of PyML in order to use datafunc module. First, prepend the following two lines to PyML/containers/datafunc.py and re-install the PyML library.

from PyML.containers.baseDatasets import BaseVectorDataSet
from PyML.containers.vectorDatasets import SparseDataSet

Then you can import the modules as follows:

from PyML import svm, modelSelection, ker
from from PyML.containers import datafunc
from from PyML.evaluators import assess

BTW, I recommend that you use more documented and tested machine learning library, such as scikit-learn.

seikichi
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  • I actually try to run the source code of a research article, so I had to install PyML because they did so. Your method worked very well, thank you! However, this time I get this error message saying `data = datafunc.KernelData(sys.argv[3]) AttributeError: module object has no attribute KernelData `. Any chance you have an idea about this? Thanks in advance. – patti_jane Mar 20 '14 at 22:41
  • `from PyML.containers import KernelData` – seikichi Mar 21 '14 at 02:43
  • hmm, but it didn't solve the problem, because there is no `KernelData` in containers, but `kernelData`. Besides importing `kernelData` also didn't work :( Thanks anyway! – patti_jane Mar 21 '14 at 12:37