text: # -*- coding: utf-8 -*-
  from __future__ import absolute_import
  from ..utils.data_utils import get_file
  from six.moves import cPickle
  from six.moves import zip
  import numpy as np
  import sys
  
  
  def load_data(path='reuters.pkl', nb_words=None, skip_top=0,
                maxlen=None, test_split=0.2, seed=113,
                start_char=1, oov_char=2, index_from=3):
      """Loads the Reuters newswire classification dataset.
  
      # Arguments
          path: where to store the data (in `/.keras/dataset`)
          nb_words: max number of words to include. Words are ranked
              by how often they occur (in the training set) and only
              the most frequent words are kept
          skip_top: skip the top N most frequently occuring words
              (which may not be informative).
          maxlen: truncate sequences after this length.
          test_split: Fraction of the dataset to be used as test data.
          seed: random seed for sample shuffling.
          start_char: The start of a sequence will be marked with this character.
              Set to 1 because 0 is usually the padding character.
          oov_char: words that were cut out because of the `nb_words`
              or `skip_top` limit will be replaced with this character.
          index_from: index actual words with this index and higher.
  
      Note that the 'out of vocabulary' character is only used for
      words that were present in the training set but are not included
      because they're not making the `nb_words` cut here.
      Words that were not seen in the trining set but are in the test set
      have simply been skipped.
      """
  
      path = get_file(path, origin='https://s3.amazonaws.com/text-datasets/reuters.pkl')
      f = open(path, 'rb')
      X, labels = cPickle.load(f)
      f.close()
  
      np.random.seed(seed)
      np.random.shuffle(X)
      np.random.seed(seed)
      np.random.shuffle(labels)
  
      if start_char is not None:
          X = [[start_char] + [w + index_from for w in x] for x in X]
      elif index_from:
          X = [[w + index_from for w in x] for x in X]
  
      if maxlen:
          new_X = []
          new_labels = []
          for x, y in zip(X, labels):
              if len(x) < maxlen:
                  new_X.append(x)
                  new_labels.append(y)
          X = new_X
          labels = new_labels
  
      if not nb_words:
          nb_words = max([max(x) for x in X])
  
      # by convention, use 2 as OOV word
      # reserve 'index_from' (=3 by default) characters: 0 (padding), 1 (start), 2 (OOV)
      if oov_char is not None:
          X = [[oov_char if (w >= nb_words or w < skip_top) else w for w in x] for x in X]
      else:
          nX = []
          for x in X:
              nx = []
              for w in x:
                  if (w >= nb_words or w < skip_top):
                      nx.append(w)
              nX.append(nx)
          X = nX
  
      X_train = X[:int(len(X) * (1 - test_split))]
      y_train = labels[:int(len(X) * (1 - test_split))]
  
      X_test = X[int(len(X) * (1 - test_split)):]
      y_test = labels[int(len(X) * (1 - test_split)):]
  
      return (X_train, y_train), (X_test, y_test)
  
  
  def get_word_index(path='reuters_word_index.pkl'):
      path = get_file(path, origin='https://s3.amazonaws.com/text-datasets/reuters_word_index.pkl')
      f = open(path, 'rb')
  
      if sys.version_info < (3,):
          data = cPickle.load(f)
      else:
          data = cPickle.load(f, encoding='latin1')
  
      f.close()
      return data
  