I searched throughout the inter-webs for this one, didnt find anything, except for a 'deleted' post on stack overflow.
The problem is the following : Every examples, tutorials on PyBrain LSTM + SequencialDataSet givwa me the following error :
TypeError: slice indices must be integers or None or have an __index__ method
From my previous searches, it seems to be a problem where, after a certain version of python, integer operations returns float instead of integers
However, it seems to work with everyone else using python 2.x like me. Any idea ?
Code (Which is not mine, took from another stackoverflow post) :
from pybrain.tools.shortcuts import buildNetwork
from pybrain.supervised.trainers import BackpropTrainer
from pybrain.datasets import SequentialDataSet
from pybrain.structure import SigmoidLayer, LinearLayer
from pybrain.structure import LSTMLayer
import itertools
import numpy as np
INPUTS = 5
OUTPUTS = 1
HIDDEN = 40
net = buildNetwork(INPUTS, HIDDEN, OUTPUTS, hiddenclass=LSTMLayer, outclass=LinearLayer, recurrent=True, bias=True)
ds = SequentialDataSet(INPUTS, OUTPUTS)
ds.addSample([0,1,2,3,4],[5])
ds.addSample([5,6,7,8,9],[10])
ds.addSample([10,11,12,13,14],[15])
ds.addSample([16,17,18,19,20],[21])
net.randomize()
trainer = BackpropTrainer(net, ds)
for _ in range(1000):
print trainer.train()
x=net.activate([0,1,2,3,4])
print x
Which gives me this error :
File "try3.py", line 27, in <module>
print trainer.train()
File "/usr/local/lib/python2.7/dist-packages/PyBrain-0.3.3-py2.7.egg/pybrain/supervised/trainers/backprop.py", line 57, in train
for seq in self.ds._provideSequences():
File "/usr/local/lib/python2.7/dist-packages/PyBrain-0.3.3-py2.7.egg/pybrain/datasets/sequential.py", line 173, in _provideSequences
return iter(map(list, iter(self)))
File "/usr/local/lib/python2.7/dist-packages/PyBrain-0.3.3-py2.7.egg/pybrain/datasets/sequential.py", line 169, in __iter__
yield self.getSequenceIterator(i)
File "/usr/local/lib/python2.7/dist-packages/PyBrain-0.3.3-py2.7.egg/pybrain/datasets/sequential.py", line 63, in getSequenceIterator
return zip(*self.getSequence(index))
File "/usr/local/lib/python2.7/dist-packages/PyBrain-0.3.3-py2.7.egg/pybrain/datasets/sequential.py", line 56, in getSequence
return [self._getSequenceField(index, l) for l in self.link]
File "/usr/local/lib/python2.7/dist-packages/PyBrain-0.3.3-py2.7.egg/pybrain/datasets/sequential.py", line 45, in _getSequenceField
return self.getField(field)[seq[index]:]
TypeError: slice indices must be integers or None or have an __index__ method
Using :
Python 2.7.6 (default, Oct 26 2016, 20:30:19)
[GCC 4.8.4] on linux2
Found it, the difference is in pybrain, this fixed it in my setup:
pip uninstall pybrain
pip install pybrain
Try that,