magpy

Magpy is a Python wrapper for the mg search engine.

It features fast full text sarch, indexing and boolean queries.

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

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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

For installation on Windows, just extract the .zip file into your Python directory (e.g. to c:\python24\lib\).

Usage

#!/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")