Andrew Fithian wrote:
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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A solution that could work for you could be something like...
dict([(z.splitlines()[0].split()[0],z.splitlines()[1:]) for z in [x for
x in open(filename).read().split('header') if x.strip()]])
{'A': ['line 1', 'line 2', '...', 'line n1'], 'B': ['line 1', 'line 2',
'...', 'line n2']}
Of course that doesn't look very pretty and only works for a specific
case as demonstrated on your sample data.
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