stage1 = re.compile('Author\\(s\\)\\s*:\\s*(.*?)^[^\\s]', re.DOTALL | re.
    MULTILINE)
stage2 = re.compile('^\\s*(.+?)\\s*$', re.MULTILINE)
preliminary = stage1.search(text).group(1)
authors = stage2.findall(preliminary)
Converting Perl Regular Expressions to Python Regular Expressions