TypeError: '<' not supported between instances of 'Example' and 'Example'

[kidman99]

Got the error when running the following code. Is there anything similar to an operator overloading for "<" needed here, or there is a go around way here?

from torchtext.data import TabularDataset
from torchtext import data
from torchtext.vocab import GloVe
from torchtext.vocab import GloVe

tv_datafields = [("id", None), # we won't be needing the id, so we pass in None as the field
("question_text", TEXT),
("target", LABEL)]

trn = TabularDataset.splits(
path="data/quora", # the root directory where the data lies
train='train.csv',
format='csv',
skip_header=True, # if your csv header has a header, make sure to pass this to ensure it doesn't get proceesed as data!
fields=tv_datafields)

TEXT.build_vocab(trn, vectors=GloVe(name='6B', dim=300))

[tu-artem]

.splits() returns a tuple of datasets, in your case it is of length 1. So

trn = TabularDataset.splits(
...
...
...
fields=tv_datafields)[0]

should work here or you can use a regular TabularDataset constructor instead.

[cheryllwl]

I had the same problem with TabularDataset too
http://mlexplained.com/2018/02/08/a-comprehensive-tutorial-to-torchtext/
This tutorial was helpful.

added these two lines and it worked like a charm

[mttk]

thanks @cheryllwl , this should be documented properly.

[kunjmehta]

@tu-artem Can you please elaborate on what adding the index [0] does?
From what I gather the splits() method returns a Dataset object as a tuple containing Example objects (instances/rows)
So, if I write;
train, val = torchtext.data.TabularDataset.splits(path='./', train = "train.csv", test = "test.csv", format='csv', fields=data_fields, skip_header = True)
I will get a Dataset object which is a tuple containing all training instances in train variable and another Dataset object containing all test instances in val variable. Am I right?
In this case, please help me understand what the indexing [0] does. Thanks.

[tu-artem]

@kunjmehta in your case you are already doing tuple unpacking via multiple assignment train, val = ..., so you don't need any further indexing

[aaronbriel]

What worked for me was to simply add sort=False, as sorting was not needed in my case.

[Sandesh10]

What worked for me was to simply add sort=False, as sorting was not needed in my case.

This worked for me too. I added sort=False as a parameter in the BucketIterator.

[Oscarjia]

i solved this by add sort=False parameter.

device = "cuda" train_iterator,valid_iterator,test_iterator=data.BucketIterator.splits((train,valid,test),sort=False,batch_size=32,device=device)

[zhangguanheng66]

@Oscarjia Thanks for helping debug.

Just FYI, Example and BucketIterator will be moved to the legacy folder and not maintained anymore. This is part of the plan for revamping torchtext library. #985