#103 Getting to 10x (results for developers)

• via Christopher Patti, created by Bogdan Popa
• Readable regular expressions for Python 3.6 and up.
• It’s a tiny Python library made up of combinators that help you write regular expressions you can read and modify six months down the line.
• Best understood via an example:

    >>> hash = text('#')
    >>> hexdigit = any_of(in_range('0', '9') + in_range('a', 'f') + in_range('A', 'F'))
    >>> hexcolor = (
    ...     beginning_of_line() + hash +
    ...     group(repeated(hexdigit, exactly=6) | repeated(hexdigit, exactly=3)) +
    ...     end_of_line()
    ... )
    >>> str(hexcolor)
    '^\\#([a-f0-9]{6}|[a-f0-9]{3})$'

• Has automatic escaping for [ and \ etc: str(any_of(text("[]"))) → '[\\[\\]]'
• Easily testable / inspectable. Just call str on any expression.