transformers---FloatProgress not found. Please update jupyter and ipywidgets.

problem

Huggingface transformers run the demo, error FloatProgress not found. details as follows:

import torch
from transformers import BertTokenizer, BertModel, BertForMaskedLM

import logging
logging.basicConfig(level=logging.INFO)

tokenizer = BertTokenizer.from_pretrained('bert-base-uncased')

Error:

filelock:Lock 140228336084248 acquired on
......
ImportError: IntProgress not found. Please update jupyter and ipywidgets.

solve:

添加 from ipywidgets import IntProgress

import torch
from ipywidgets import IntProgress
from transformers import BertTokenizer, BertModel, BertForMaskedLM

import logging
logging.basicConfig(level=logging.INFO)

tokenizer = BertTokenizer.from_pretrained('bert-base-uncased')