Я пытаюсь построить классификатор как с обучающим, так и с тестовым набором. Однако FastAI выдает ошибку UserWarning: Your training set is empty
, несмотря на то, что и обучающий, и тестовый наборы не пусты. Это результат моих команд терминала, чтобы узнать, сколько элементов в каждой папке:
%cd Food-101/images/train/
!ls -1 | wc -l
%cd ../test
!ls -1 | wc -l
%cd ../../
/content/Food-101/images/train
75750
/content/Food-101/images/test
25250
/content/Food-101
Это мой код:
import pandas as pd
from fastai import *
from fastai.vision import *
from fastai.callbacks.hooks import *
from pathlib import Path
from numba import vectorize
from subprocess import call, run
import os, git, glob, shutil
file_parse = r'/([^/]+)_\d+\.(png|jpg|jpeg)$'
np.random.seed(42)
data = ImageDataBunch.from_folder(path, train= path + '/images/train', test=path + '/images/test', valid_pct=0.2, ds_tfms=get_transforms(), size=224)
data.normalize(imagenet_stats)
И это ошибка:
/usr/local/lib/python3.6/dist-packages/fastai/data_block.py:458: UserWarning: Your training set is empty. If this is by design, pass `ignore_empty=True` to remove this warning.
warn("Your training set is empty. If this is by design, pass `ignore_empty=True` to remove this warning.")
/usr/local/lib/python3.6/dist-packages/fastai/data_block.py:461: UserWarning: Your validation set is empty. If this is by design, use `split_none()`
or pass `ignore_empty=True` when labelling to remove this warning.
or pass `ignore_empty=True` when labelling to remove this warning.""")
---------------------------------------------------------------------------
IndexError Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/fastai/data_block.py in get_label_cls(self, labels, label_cls, label_delim, **kwargs)
264 if label_delim is not None: return MultiCategoryList
--> 265 try: it = index_row(labels,0)
266 except: raise Exception("""Can't infer the type of your targets.
7 frames
IndexError: index 0 is out of bounds for axis 0 with size 0
During handling of the above exception, another exception occurred:
Exception Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/fastai/data_block.py in get_label_cls(self, labels, label_cls, label_delim, **kwargs)
265 try: it = index_row(labels,0)
266 except: raise Exception("""Can't infer the type of your targets.
--> 267 It's either because your data source is empty or because your labelling function raised an error.""")
268 if isinstance(it, (float, np.float32)): return FloatList
269 if isinstance(try_int(it), (str, Integral)): return CategoryList
Exception: Can't infer the type of your targets.
It's either because your data source is empty or because your labelling function raised an error.
Я не понимаю, почему это вызывает эту ошибку, когда оба каталога явно заполнены изображениями.