Insert a line-break every n characters, reset n on line-break using Python

Question

I get a block of text from the Jira REST-Api. I need to insert a line break every 150 characters.

If the 150th character is not a whitespace insert the line break into the last whitespace, that count should reset if that text contains a line break.

i've tried it with regex, but it deletes/ignores the line breaks already in the text and it inserts line breaks in the middle of words

featureText = re.sub("(.{150})", "\\1\n", featureText, 0, re.DOTALL)
#featureText contains some text from the api get request

for simplicity's sake let's say i want to add a linebreak every 10 characters. and i have the text

My Television is broken
and that sucks

i currently get

My Televis
ion is bro
ken and th
at sucks

what i want is

My
Television
is broken
and that
sucks

Edit: Clarified my question for it to be loser to the real world. Only the example uses 10 characters, my real problem uses 150 characters so don't worry about cutting a word in half, i guess there won't be any word that is 150 characters long.

Answer 1

I would use textwrap like this:

import textwrap

example = textwrap.dedent("""\
    My Television is broken
    and that sucks""")

print '\n'.join(l for line in example.splitlines() 
                  for l in textwrap.wrap(line, width=10))

This results in:

My
Television
is broken
and that
sucks

A better example is:

example = textwrap.dedent("""\
    My Television is
    and that sucks""")

Which results in:

My
Television
is
and that
sucks

This better shows that the original lines are individually wrapped.