I am not able to import resnet from keras.applications module

Question

I\'m unable to import this module

import keras.applications.resnet

ModuleNotFoundError
in () ----> 1 import keras.a

Answer 1

Found a workaround to use ResNeXt in Keras 2.2.4 here.

ResNeXt50() function needs 4 more arguments: backend, layers, models and utils.

import keras
from keras_applications.resnext import ResNeXt50

model = ResNeXt50(weights='imagenet',
                  backend=keras.backend,
                  layers=keras.layers,
                  models=keras.models,
                  utils=keras.utils)

Answer 2

Check the versions.

pip list | grep Keras

If it's already installed,uninstall and upgrade.

pip uninstall Keras
pip install Keras==2.3.1

pip uninstall Keras-Applications
pip install Keras-Applications==1.0.8

pip uninstall Keras-Preprocessing
pip install Keras-Preprocessing==1.1.0

Hope it helps.

Answer 3

In Keras there are multiple flavours of ResNet, you will have to specify the version of ResNet that you want e.g. You wish to load the ResNet50.

Use

from keras.applications import ResNet50

Edit 2 This is the list you get when you use dir() command on applications

['DenseNet121', 'DenseNet169', 'DenseNet201', 'InceptionResNetV2', 'InceptionV3', 'MobileNet', 'MobileNetV2', 'NASNetLarge', 'NASNetMobile', 'ResNet50', 'VGG16', 'VGG19', 'Xception', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__path__', '__spec__', 'absolute_import', 'backend', 'densenet', 'division', 'inception_resnet_v2', 'inception_v3', 'keras_applications', 'keras_modules_injection', 'layers', 'mobilenet', 'mobilenet_v2', 'models', 'nasnet', 'print_function', 'resnet50', 'utils', 'vgg16', 'vgg19', 'xception'], the models visible here can be laoded like this, There are some models like ResNet101 missing here, let me see if I can come up with a way to fix this.

Edit Proof that this works too

To see all the available versions of the Resnet models, visit https://keras.io/applications/#resnet

Answer 4

Keras team hasn't included resnet, resnet_v2 and resnext in the current module, they will be added from Keras 2.2.5, as mentioned here.

For a workaround, you can use keras_applications module directly to import all ResNet, ResNetV2 and ResNeXt models, as given below

from keras_applications.resnet import ResNet50

Or if you just want to use ResNet50

from keras.applications.resnet50 import ResNet50

Alternatively, you can always build from source as mentioned here.

Answer 5

There is a python package named 'keras-resnet' which has ResNet50, ResNet101, ResNet152 and many more variants of ResNet. (https://pypi.org/project/keras-resnet/)

Installation is also quite easy. Just type

pip install keras-resnet

It will install this module and then use it like:

from keras_resnet.models import ResNet50, ResNet101, ResNet152

backbone = ResNet50(inputs=image_input, include_top=False, freeze_bn=True)
C2, C3, C4, C5 = backbone.outputs # this will give you intermediate 
# outputs of four blocks of resnet if you want to merge low and high level features

I am using backbones from this module and is working fine for me!