def pdfrate(pdf_file_paths, speed_up = True):
    if type(pdf_file_paths) != list:
        pdf_file_paths = [pdf_file_paths]
    classifier = pdfrate_classifier
    all_feat_np = pdfrate_feature(pdf_file_paths, speed_up)
    scores = classifier.decision_function(all_feat_np)
    scores = [float(s[0]) for s in scores]
    return scores