Keras Error in py_call_impl(callable, dots$args, dots$keywords) :

Question

I am doing deep learning using Keras in Rstudio.I copy and paste this link https://tensorflow.rstudio.com/tutorials/beginners/basic-ml/tutorial_basic_regression/

boston_housing <- dataset_boston_housing()

c(train_data, train_labels) %<-% boston_housing$train
c(test_data, test_labels) %<-% boston_housing$test

paste0("Training entries: ", length(train_data), ", labels: ", length(train_labels))

train_data[1, ] # Display sample features, notice the different scales

library(dplyr)

column_names <- c('CRIM', 'ZN', 'INDUS', 'CHAS', 'NOX', 'RM', 'AGE', 
                  'DIS', 'RAD', 'TAX', 'PTRATIO', 'B', 'LSTAT')

train_df <- train_data %>% 
  as_tibble(.name_repair = "minimal") %>% 
  setNames(column_names) %>% 
  mutate(label = train_labels)

test_df <- test_data %>% 
  as_tibble(.name_repair = "minimal") %>% 
  setNames(column_names) %>% 
  mutate(label = test_labels)

train_labels[1:10] # Display first 10 entries

spec <- feature_spec(train_df, label ~ . ) %>% 
  step_numeric_column(all_numeric(), normalizer_fn = scaler_standard()) 

spec <- fit(spec)

layer <- layer_dense_features(
  feature_columns = dense_features(spec), 
  dtype = tf$float32
)

layer(train_df)

layer(train_df)

Error in py_call_impl(callable, dots$args, dots$keywords) : 
  ValueError: ('We expected a dictionary here. Instead we got: ',          CRIM    ZN  INDUS  CHAS     NOX  ...    TAX  PTRATIO       B  LSTAT  label
0     1.23247   0.0   8.14   0.0  0.5380  ...  307.0     21.0  396.90  18.72   15.2
1     0.02177  82.5   2.03   0.0  0.4150  ...  348.0     14.7  395.38   3.11   42.3
**sessionInfo()**

R version 3.6.3 (2020-02-29) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows 10 x64 (build 18363)

Matrix products: default

locale: [1] LC_COLLATE=Spanish_Chile.1252 LC_CTYPE=Spanish_Chile.1252 LC_MONETARY=Spanish_Chile.1252 [4] LC_NUMERIC=C LC_TIME=Spanish_Chile.1252

attached base packages: [1] stats graphics grDevices utils datasets methods base

other attached packages: [1] dplyr_0.8.5 tfdatasets_2.0.0 keras_2.2.5.0 tensorflow_2.0.0

loaded via a namespace (and not attached): [1] Rcpp_1.0.3 pillar_1.4.3 compiler_3.6.3 prettyunits_1.1.1 base64enc_0.1-3 tools_3.6.3
[7] progress_1.2.2 zeallot_0.1.0 digest_0.6.25 packrat_0.5.0 jsonlite_1.6.1 evaluate_0.14
[13] tibble_2.1.3 pkgconfig_2.0.3 rlang_0.4.5 cli_2.0.2 rstudioapi_0.11 yaml_2.2.1
[19] xfun_0.12 knitr_1.28 generics_0.0.2 vctrs_0.2.4 rappdirs_0.3.1 hms_0.5.3
[25] tidyselect_1.0.0 reticulate_1.14 glue_1.3.2 forge_0.2.0 R6_2.4.1 fansi_0.4.1
[31] rmarkdown_2.1 purrr_0.3.3 magrittr_1.5 whisker_0.4 tfestimators_1.9.1 tfruns_1.4
[37] htmltools_0.4.0 assertthat_0.2.1 crayon_1.3.4

user_13465258 · Answer

Can you please try the fix mentioned here.

Provided the solution below as well if in case the link is broken -

To install the fix you should be sure to close all R sessions then open a fresh R session and execute:

devtools::install_github("rstudio/reticulate")

The reason you need to close all R sessions is that windows shared libraries won't be successfully overwritten if they are in use during the installation.

Hope this works and fixes the issue you are facing.

Keras Error in py_call_impl(callable, dots$args, dots$keywords) :

1 Answers