magpy 0.3.0 review

Magpy is a Python wrapper for the mg search engine. magpy module features fast full text sarch, indexing and boolean queries. B

License: GPL (GNU General Public License) File size: 355K Developer: Matthias Kramm

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Magpy is a Python wrapper for the mg search engine.

magpy module features fast full text sarch, indexing and boolean queries.

Both mg and magpy are released under the GPL (General Public License).

Installation:

To install magpy from source, extract the archive magpy-*.tar.gz, and run the following commands:

./configure
python setup.py build
python setup.py install

Usage:

The following script demonstrates a simple search frontend:

#!/usr/bin/python

import mgindexer
import mgquery
import sys

store = mgquery.MGSearchStore("/tmp/data","alice")

while 1:
query = sys.stdin.readline()
q = store.newQuery(query)
print "Searching for",query,"(words",q.words(),")"
for docnum,ranking in q.execute():
print "Document",docnum,"matches (Ranking",ranking,")"


Before this works, you first have to create search store at (here) the location

"/tmp/data", with the name "alice".

The following script creates such a store from a raw text file, which it splits into individual documents by splitting it into paragraphs.

#!/usr/bin/python

import mgindexer

fi = open("alice13a.txt", "rb")
fo = open("alice13a.splitted.txt", "wb")

for line in fi.readlines():
# split the file on the paragraph boundaries
if line.strip() == "":
fo.write(mgindexer.SEPARATOR)
else:
fo.write(line)
fo.close()
fi.close()

mgindexer.makeindex("alice13a.splitted.txt", "/tmp/data/", "alice")

If you have many individual documents you would like to run a search on, the following script is probably closer to what you need (notice it creates a new collection of the name "files", so you have to substitute "alice" by "files" in the example query script above):

#!/usr/bin/python

import mgindexer
import os

PATH = "files/"

fo = open("searchdata.txt", "wb")

for file in os.listdir(PATH):
if os.path.isfile(PATH + file):
# copy file
fi = open(PATH + file, "rb")
for line in fi.readlines():
fo.write(line)
# write document boundary
fo.write(mgindexer.SEPARATOR)
fo.close()

mgindexer.makeindex("searchdata.txt", "/tmp/data", "files")

What's New in This Release:
This release adds support for wildcard search (truncation).
Document types that have delimiters different from whitespace are now supported.