PyTorch: ModuleNotFoundError: No module named 'past'

Question:

When writing PyTorch program, there are mistakes:

Traceback (most recent call last):
  File "G:/pycharm Project/PytorchLearning/pytorch_second/LearnBoard.py", line 13, in <module>
    from torch.utils.tensorboard import SummaryWriter
  File "D:\Anaconda\envs\gpu-env\lib\site-packages\torch\utils\tensorboard\__init__.py", line 6, in <module>
    from .writer import FileWriter, SummaryWriter  # noqa F401
  File "D:\Anaconda\envs\gpu-env\lib\site-packages\torch\utils\tensorboard\writer.py", line 18, in <module>
    from ._convert_np import make_np
  File "D:\Anaconda\envs\gpu-env\lib\site-packages\torch\utils\tensorboard\_convert_np.py", line 12, in <module>
    from caffe2.python import workspace
  File "D:\Anaconda\envs\gpu-env\lib\site-packages\caffe2\python\workspace.py", line 15, in <module>
    from past.builtins import basestring
ModuleNotFoundError: No module named 'past'

Process finished with exit code 1

Solution:

After a review of relevant data and found that past modules, turned out to be a pip install future, served!
Execution pip install future, after installing future, normal execution!