Keras Deep Learning Cookbook

Padding with truncation

Let's look at how to use the maxlen parameter to truncate pre and post:

padded_maxlen_truncating_pre = pad_sequences(sequences,maxlen=3, truncating='pre')print(padded_maxlen_truncating_pre)

The output of the preceding code is shown here:

[[2 3 4] [5 6 7] [0 0 5]]

In the preceding output, the first value of first row was truncated:

padded_maxlen_truncating_post = pad_sequences(sequences,maxlen=3, truncating='post')print(padded_maxlen_truncating_post)

The output of the preceding code is as follows:

[[1 2 3] [5 6 7] [0 0 5]]

In the preceding output, the last value of first row was truncated.