Splitting textfile into section with special delimiter line - python

Question

I have an input file as such:

This is a text block start
This is the end

And this is another
with more than one line
and another line.

The

Answer 1

How about something like this?

from itertools import groupby

def per_section(s, delimiters=()):
    def key(s):
        return not s or s.isspace() or any(s.startswith(x) for x in delimiters)
    for k, g in groupby(s.splitlines(), key=key):
        if not k:
            yield list(g)


if __name__ == '__main__':
    print list(per_section('''This is a text block start
This is the end

And this is another
with more than one line
and another line.'''))

    print list(per_section('''# Some comments, maybe the title of the following section
This is a text block start
This is the end
# Some other comments and also the title
And this is another
with more than one line
and another line.''', ('#')))

print list(per_section('''!! Some comments, maybe the title of the following section
This is a text block start
This is the end
$$ Some other comments and also the title
And this is another
with more than one line
and another line.''', ('!', '$')))    

Output:

[['This is a text block start', 'This is the end'], ['And this is another', 'with more than one line', 'and another line.']]
[['This is a text block start', 'This is the end'], ['And this is another', 'with more than one line', 'and another line.']]
[['This is a text block start', 'This is the end'], ['And this is another', 'with more than one line', 'and another line.']]