Python: NameError: name 'top' is not defined

[tom...@gmx.de]

Hi,

I was using an own python layer. I used this simple code:

import caffe
import numpy as np

class DataLabelLoader(caffe.Layer):


    def setup(self, bottom, top):
        print self
        print top
        print bottom
   
        # two tops: data and label
        if len(top) != 2:     #the evil line 16
            raise Exception("Need to define two tops: data and label.")

    def reshape(self, bottom, top):
       
        pass

    def forward(self, bottom, top):
        pass

    def backward(self, top, propagate_down, bottom):
        pass

and I got the following error:

Traceback (most recent call last):
  File "/home/me/python/train/layers.py", line 7, in <module>
    class DataLabelLoader(caffe.Layer):
  File "/home/me/python/train/layers.py", line 16, in DataLabelLoader
    if len(top) != 2:
NameError: name 'top' is not defined

When I uncomment the line I can see the variables are existing!

<layers.DataLabelLoader object at 0x7ff489d31db8>
<caffe._caffe.RawBlobVec object at 0x7ff489f59cd0>
<caffe._caffe.RawBlobVec object at 0x7ff489eb8250>

How is this possible??

Cheers,
Thomy

[Manish Sapkota]

You might be looking for two bottoms?

[Manish Sapkota]

Well I tried your code, it is working fine at my end.

[tom...@gmx.de]

Thank you for feedback!
Any idea how to solve it? Is it possible my python interface is not installed properly? What caffe installation guide did you follow? I found several guides and each one is telling you different installation steps...

[tom...@gmx.de]

I found the problem: wrong indentation. Python assumed the line was not a member of the method because of spaces instead of tabulators...