[Tutor] parsing a "chunked" text file

[Andrew Fithian]

Hi tutor,

I have a large text file that has chunks of data like this:

headerA n1
line 1
line 2
...
line n1
headerB n2
line 1
line 2
...
line n2

Where each chunk is a header and the lines that follow it (up to the next
header). A header has the number of lines in the chunk as its second field.

I would like to turn this file into a dictionary like:
dict = {'headerA':[line 1, line 2, ... , line n1], 'headerB':[line1, line 2,
... , line n2]}

Is there a way to do this with a dictionary comprehension or do I have to
iterate over the file with a "while 1" loop?

-Drew
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