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[QUOTE="Chris, post: 3168139"]
To be honest I couldn't think of a neat way of doing it.
What seems to look right, albeit fairly ugleh was this.

import string
def digest_chunks(input_string, max_length):
    tmp = []
    while input_string:
        if len(input_string) >= max_length:
            if input_string[max_length] not in string.whitespace:
                y = max_length - input_string[max_length::-1].find('
')
                if not y:
                    if len(input_string) < max_length:
                        tmp.append(input_string)
                        input_string = ''
                    else:
                        y = input_string[::-1].find(' ', 1)
                        tmp.append(input_string[:y])
                        input_string = input_string[y:]
                else:
                    tmp.append(input_string[:y])
                    input_string = input_string[y:]
            else:
                tmp.append(input_string[:max_length])
                input_string = input_string[max_length:]
        else:
            tmp.append(input_string)
            input_string = ''

return '\n'.join(tmp)

s = 'this is just a random sequence of letters courtesy of monkeys on
typewriters.'

print digest_chunks(s, 20)

this is just a
 random sequence of
 letters courtesy of
 monkeys on
 typewriters.
[/QUOTE]

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