无法导入pytorch-lightning

如何解决无法导入pytorch-lightning

我使用 pip 安装了 pytorch-lightning，并且我在 Mac 上运行。 我试过了：

! pip install pytorch-lightning --upgrade
! pip install pytorch-lightning-bolts

（成功完成） 然后：

import pytorch_lightning as pl

我得到的是：

--

-------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-3-f3b4217dcea1> in <module>
      7 from torchvision.datasets import MNIST
      8 from torchvision import transforms
----> 9 import pytorch_lightning as pl
     10 from pytorch_lightning.metrics.functional import accuracy
     11 tmpdir = os.getcwd()

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/__init__.py in <module>
     60     # We are not importing the rest of the lightning during the build process,as it may not be compiled yet
     61 else:
---> 62     from pytorch_lightning import metrics
     63     from pytorch_lightning.callbacks import Callback
     64     from pytorch_lightning.core import LightningDataModule,LightningModule

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/metrics/__init__.py in <module>
     12 # See the License for the specific language governing permissions and
     13 # limitations under the License.
---> 14 from pytorch_lightning.metrics.classification import (  # noqa: F401
     15     Accuracy,16     AUC,/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/metrics/classification/__init__.py in <module>
     12 # See the License for the specific language governing permissions and
     13 # limitations under the License.
---> 14 from pytorch_lightning.metrics.classification.accuracy import Accuracy  # noqa: F401
     15 from pytorch_lightning.metrics.classification.auc import AUC  # noqa: F401
     16 from pytorch_lightning.metrics.classification.auroc import AUROC  # noqa: F401

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/metrics/classification/accuracy.py in <module>
     16 import torch
     17 
---> 18 from pytorch_lightning.metrics.functional.accuracy import _accuracy_compute,_accuracy_update
     19 from pytorch_lightning.metrics.metric import Metric
     20 

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/metrics/functional/__init__.py in <module>
     12 # See the License for the specific language governing permissions and
     13 # limitations under the License.
---> 14 from pytorch_lightning.metrics.functional.accuracy import accuracy  # noqa: F401
     15 from pytorch_lightning.metrics.functional.auc import auc  # noqa: F401
     16 from pytorch_lightning.metrics.functional.auroc import auroc  # noqa: F401

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/metrics/functional/accuracy.py in <module>
     16 import torch
     17 
---> 18 from pytorch_lightning.metrics.classification.helpers import _input_format_classification,DataType
     19 
     20 

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/metrics/classification/helpers.py in <module>
     17 import torch
     18 
---> 19 from pytorch_lightning.metrics.utils import select_topk,to_onehot
     20 from pytorch_lightning.utilities import LightningEnum
     21 

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/metrics/utils.py in <module>
     16 import torch
     17 
---> 18 from pytorch_lightning.utilities import rank_zero_warn
     19 
     20 METRIC_EPS = 1e-6

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/utilities/__init__.py in <module>
     16 import numpy
     17 
---> 18 from pytorch_lightning.utilities.apply_func import move_data_to_device  # noqa: F401
     19 from pytorch_lightning.utilities.distributed import (  # noqa: F401
     20     AllGatherGrad,/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/utilities/apply_func.py in <module>
     23 
     24 from pytorch_lightning.utilities.exceptions import MisconfigurationException
---> 25 from pytorch_lightning.utilities.imports import _TORCHTEXT_AVAILABLE
     26 
     27 if _TORCHTEXT_AVAILABLE:

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/utilities/imports.py in <module>
     54 _TORCH_GREATER_EQUAL_1_7 = _compare_version("torch",operator.ge,"1.7.0")
     55 _TORCH_QUANTIZE_AVAILABLE = bool([eg for eg in torch.backends.quantized.supported_engines if eg != 'none'])
---> 56 _APEX_AVAILABLE = _module_available("apex.amp")
     57 _BOLTS_AVAILABLE = _module_available('pl_bolts')
     58 _DEEPSPEED_AVAILABLE = not _IS_WINDOWS and _module_available('deepspeed')

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pytorch_lightning/utilities/imports.py in _module_available(module_path)
     32     """
     33     try:
---> 34         return find_spec(module_path) is not None
     35     except AttributeError:
     36         # Python 3.6

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/importlib/util.py in find_spec(name,package)
     92         parent_name = fullname.rpartition('.')[0]
     93         if parent_name:
---> 94             parent = __import__(parent_name,fromlist=['__path__'])
     95             try:
     96                 parent_path = parent.__path__

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/apex/__init__.py in <module>
     11                                 ISessionFactory)
     12 from pyramid.security import NO_PERMISSION_REQUIRED
---> 13 from pyramid.session import UnencryptedCookieSessionFactoryConfig
     14 from pyramid.settings import asbool
     15 

ImportError: cannot import name 'UnencryptedCookieSessionFactoryConfig' from 'pyramid.session' (unknown location