code: import numpy as np
  
  def pad_sequences(seqs, maxlen=None, dtype='int32'):
      """
          Pad each sequence to the same lenght: 
          the lenght of the longuest sequence.
  
          If maxlen is provided, any sequence longer
          than maxlen is truncated to maxlen.
      """
      lengths = [len(s) for s in seqs]
  
      nb_samples = len(seqs)
      if maxlen is None:
          maxlen = np.max(lengths)
  
      x = np.zeros((nb_samples, maxlen)).astype(dtype)
      for idx, s in enumerate(seqs):
          x[idx, :lengths[idx]] = s[:maxlen]
  
      return x
apis: numpy.max numpy.zeros