On 12/03/2012 19:39, Virgil Stokes wrote:
I have a rather large ASCII file that is structured as follows
header line
9 nonblank lines with alphanumeric data
header line
9 nonblank lines with alphanumeric data
...
...
...
header line
9 nonblank lines with alphanumeric data
EOF
where, a data set contains 10 lines (header + 9 nonblank) and there can
be several thousand
data sets in a single file. In addition,*each header has a* *unique ID
code*.
Is there a fast method for the retrieval of a data set from this large
file given its ID code?
Probably the best solution is to put it into a database. Have a look at
the sqlite3 module.
Alternatively, you could scan the file, recording the ID and the file
offset in a dict so that, given an ID, you can seek directly to that
file position.
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