Padding the smaller reviews and truncating the large reviews

padding.py

def pad_features(reviews_ints, seq_length):
    ''' Return features of review_ints, where each review is padded with 0's 
        or truncated to the input seq_length.
    '''
    features = []
    
    ## implement function
    for review in reviews_ints:
        if len(review)<seq_length:
            features.append(list(np.zeros(seq_length-len(review)))+review)
        elif len(review)>seq_length:
            features.append(review[:seq_length])
        else:
            features.append(review)
    
    features = np.array(features)
    return features