Traceback (most recent call last):


 "train.py", line 14, in <module>

from fairseq import bleu, data, options, utils


 "/home/hfyu/fairseq16/fairseq-py-master/fairseq/options.py", line 11, in <module>

from fairseq import models


 "/home/hfyu/fairseq16/fairseq-py-master/fairseq/models/__init__.py", line 9, in <module>

from . import fconv


 "/home/hfyu/fairseq16/fairseq-py-master/fairseq/models/fconv.py", line 14, in <module>

from fairseq.modules import BeamableMM, LinearizedConvolution


 "/home/hfyu/fairseq16/fairseq-py-master/fairseq/modules/__init__.py", line 10, in <module>

from .conv_tbc import ConvTBC


 "/home/hfyu/fairseq16/fairseq-py-master/fairseq/modules/conv_tbc.py", line 18, in <module>

raise e


 "/home/hfyu/fairseq16/fairseq-py-master/fairseq/modules/conv_tbc.py", line 14, in <module>

from fairseq import temporal_convolution_tbc


 "/home/hfyu/fairseq16/fairseq-py-master/fairseq/temporal_convolution_tbc/__init__.py", line 3, in <module>

from ._temporal_convolution_tbc import lib as _lib, ffi as _ffi
ImportError: /home/hfyu/fairseq16/fairseq-py-master/fairseq/temporal_convolution_tbc/_temporal_convolution_tbc.so: undefined symbol: _ZNK2at4Type4copyERKNS_6TensorERS1

Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "/software/pytroll/virtual-env-test/pytroll/lib/python3.5/site-packages/xarray/__init__.py", line 26, in <module>

from .coding.cftime_offsets import cftime_range


 "/software/pytroll/virtual-env-test/pytroll/lib/python3.5/site-packages/xarray/coding/cftime_offsets.py", line 46, in <module>

from typing import ClassVar, Optional
ImportError: cannot import name 'ClassVar'
