Error in running triplet_movielens.py

[sumedhvdatar]

Error in running triplet_movielens.py

[mindis]

based on https://stackoverflow.com/questions/43160181/keras-merge-layer-warning

"""
Triplet loss network example for recommenders
"""

from future import print_function

import numpy as np

from keras import backend as K
from keras.models import Model
from keras.layers import Embedding, Flatten, Input, Lambda
from keras.optimizers import Adam
import data
import metrics

def identity_loss(y_true, y_pred):

return K.mean(y_pred - 0 * y_true)

def bpr_triplet_loss(X):

positive_item_latent, negative_item_latent, user_latent = X

# BPR loss
loss = 1.0 - K.sigmoid(
    K.sum(user_latent * positive_item_latent, axis=-1, keepdims=True) -
    K.sum(user_latent * negative_item_latent, axis=-1, keepdims=True))

return loss

def build_model(num_users, num_items, latent_dim):

positive_item_input = Input((1, ), name='positive_item_input')
negative_item_input = Input((1, ), name='negative_item_input')

# Shared embedding layer for positive and negative items
item_embedding_layer = Embedding(
    num_items, latent_dim, name='item_embedding', input_length=1)

user_input = Input((1, ), name='user_input')

positive_item_embedding = Flatten()(item_embedding_layer(
    positive_item_input))
negative_item_embedding = Flatten()(item_embedding_layer(
    negative_item_input))
user_embedding = Flatten()(Embedding(
    num_users, latent_dim, name='user_embedding', input_length=1)(
        user_input))

def out_shape(shapes):
    return shapes[0]

loss = Lambda(bpr_triplet_loss, output_shape=out_shape)([positive_item_embedding, negative_item_embedding,user_embedding])

model = Model(
    input=[positive_item_input, negative_item_input, user_input],
    output=loss)
model.compile(loss=identity_loss, optimizer=Adam())

return model

[myeonghak]

for those who are encountering this issue,

> TypeError: ('Keyword argument not understood:', 'input')

the solution is to remove keywords in Model function.

so the fixed code will be look like this.

model = Model(
[positive_item_input, negative_item_input, user_input],
loss)

source: https://stackoverflow.com/questions/60690327/typeerror-keyword-argument-not-understood-inputs