Optimizers missing with MXNet backend

[sandeep-krishnamurthy]

Following optimizers are not implemented yet for MXNet backend.

1. Adamax
2. NAdam
3. Adam_AMSGrad

[sandeep-krishnamurthy]

Closing in favor of #18

[edmondja]

Will it fix this error I have ?

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/optimizers.py", line 706, in
SGD, Adagrad, Adadelta, Adam, Adamax, RMSprop, Nadam = K.get_optimizers()

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/backend/mxnet_backend.py", line 5058, in get_optimizers
class Adamax(MXOptimizer, mx.optimizer.Adamax):

AttributeError: module 'mxnet.optimizer' has no attribute 'Adamax'

[roywei]

@edmondja which version of mxnet are you using?
A reproducible code snippet would help use debug.
Thanks!

[edmondja]

Thanks to you for helping.

import os
os.environ['KERAS_BACKEND'] = 'mxnet'

import keras
Using MXNet backend
Traceback (most recent call last):

File "", line 1, in
import keras

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/init.py", line 3, in
from . import utils

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/utils/init.py", line 27, in
from .multi_gpu_utils import multi_gpu_model

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/utils/multi_gpu_utils.py", line 7, in
from ..layers.merge import concatenate

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/layers/init.py", line 4, in
from ..engine.base_layer import Layer

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/engine/init.py", line 7, in
from .network import get_source_inputs

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/engine/network.py", line 15, in
from . import saving

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/engine/saving.py", line 15, in
from .. import optimizers

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/optimizers.py", line 706, in
SGD, Adagrad, Adadelta, Adam, Adamax, RMSprop, Nadam = K.get_optimizers()

File "/Users/edmondjacoupeau/anaconda/lib/python3.6/site-packages/keras/backend/mxnet_backend.py", line 5058, in get_optimizers
class Adamax(MXOptimizer, mx.optimizer.Adamax):

AttributeError: module 'mxnet.optimizer' has no attribute 'Adamax'

keras-mxnet-2.2.0 with pip install --upgrade keras-mxnet on osx sierra, mbp early 2015.

[sandeep-krishnamurthy]

Can you please verify mxnet version?
You can install MXNet on Mac with - pip install mxnet --user

[edmondja]

pip install mxnet --user
Requirement already satisfied: mxnet in ./anaconda/lib/python3.6/site-packages (0.10.0.post2)

[edmondja]

Yes sorry it was just the version. I dont know for which reason I had a weird version...
Works fine now.