python - ImportError:无法导入名称“后端”
问题描述
backend
从导入时遇到 ImportErrorkeras
from keras import backend
输出是
Using TensorFlow backend.
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/keras/__init__.py", line 3, in <module>
from . import utils
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/keras/utils/__init__.py", line 6, in <module>
from . import conv_utils
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/keras/utils/conv_utils.py", line 9, in <module>
from .. import backend as K
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/keras/backend/__init__.py", line 89, in <module>
from .tensorflow_backend import *
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/keras/backend/tensorflow_backend.py", line 5, in <module>
import tensorflow as tf
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/tensorflow/__init__.py", line 24, in <module>
from tensorflow.python import pywrap_tensorflow # pylint: disable=unused-import
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/tensorflow/python/__init__.py", line 88, in <module>
from tensorflow.python import keras
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/tensorflow/python/keras/__init__.py", line 25, in <module>
from tensorflow.python.keras import applications
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/tensorflow/python/keras/applications/__init__.py", line 74, in <module>
from tensorflow.python.keras.applications.densenet import DenseNet121
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/tensorflow/python/keras/applications/densenet/__init__.py", line 21, in <module>
from tensorflow.python.keras._impl.keras.applications.densenet import decode_predictions
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/tensorflow/python/keras/_impl/keras/applications/densenet.py", line 30, in module>
from tensorflow.python.keras._impl.keras import backend as K
ImportError: cannot import name 'backend'
我不明白哪个可能是问题所在。
解决方案
我已经通过卸载keras
和tensorflow
删除它们在文件夹中的site-packages
目录然后再次安装它们来解决。
pip3 uninstall tensorflow
pip3 uninstall keras
rm -r /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/keras*
rm -r /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/Keras*
rm -r /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/tensorflow*
pip3 install tensorflow
pip3 install keras
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