Python：类型错误“float”对象不可迭代

Question

My code is :

for ep in range(10):
    for x, y in tqdm(train_iterator.gen_batches(batch_size=64, 
                                           data_type="train")):
        x_embed = embedder(tokenizer(str_lower(x)))
        y_onehot = onehotter(classes_vocab(y))
        cls.train_on_batch(x_embed, y_onehot)

and the result :

<ipython-input-30-3f8c38399ce9> in <module>()
      2     for x, y in tqdm(train_iterator.gen_batches(batch_size=64, 
      3                                            data_type="train")):
----> 4         x_embed = embedder(tokenizer(str_lower(x)))
      5         y_onehot = onehotter(classes_vocab(y))
      6         cls.train_on_batch(x_embed, y_onehot)

1 frames
/usr/local/lib/python3.6/dist-packages/deeppavlov/models/preprocessors/str_lower.py in str_lower(batch)
     31         return batch.lower()
     32     else:
---> 33         return list(map(str_lower, batch))

TypeError: 'float' object is not iterable

I have tried to change it to ep = int [float] but this doesn't work either.

Answer 1

str_lower() takes either a string as an argument or an iterable type and calls .lower() on it. However in your code x is of type float. So whenever list() is called with x as an argument it returns this error:

>>> list(3.14)
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    list(3.14)
TypeError: 'float' object is not iterable

So you either want to:

• Make sure x is a string
• Not call str_lower(x)