Feature columns tensorflow

numerical_columns=['Length','Diameter','Height','Whole_weight','Shucked_weight','Viscera_weight','Shell_weight']
categorical_columns=['Sex']

feature_columns=[]

for value in numerical_columns:
  feature_columns.append(tf.feature_column.numeric_column(value,dtype=tf.float32))

for value in categorical_columns:
  unique_values=dataset[value].unique()
  feature_columns.append(tf.feature_column.categorical_column_with_vocabulary_list(value,unique_values))

feature_columns