Really nice script for generating personal genre preferences stats from LastFM
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#!/usr/bin/python
#
# find_similar_tags.py: parses the tag dump file from scaicha to find
# possibly misspelled tags
#
# Copyright (C) 2013 Alexander Heinlein <alexander.heinlein@web.de>
#
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 3
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA
#
import difflib
import getopt
import sys
from collections import defaultdict
from itertools import combinations
def printUsage(name):
print "usage:", name, "[OPTIONS] [FILES]"
print " -f , --fast fast mode with less accuracy"
print " -r <arg>, --ratio <arg> minimum similarity ratio (0..1) (default: 0.9)"
print " -o <arg>, --occRatio <arg> minimum occurence ratio (0..1) (default: 0.05)"
print " for the more common tag, less occuring tags"
print " won't be reported"
print " -h , --help print this help and exit"
print
if __name__ == '__main__':
try:
# get command line arguments
opts, args = getopt.getopt(sys.argv[1:], "fr:o:h", ["fast", "ratio=", "occRatio=", "help"])
except getopt.GetoptError:
printUsage(sys.argv[0])
raise RuntimeError, "invalid argument specified"
fast = False
minSimilarityRatio = 0.9
minOccurenceRatio = 0.05
for opt, arg in opts:
if opt in ("-f", "--fast"):
fast = True
elif opt in ("-r", "--ratio"):
try:
minSimilarityRatio = float(arg)
except ValueError:
raise RuntimeError, "ratio argument '" + arg + "' is not a float!"
elif opt in ("-o", "--occRatio"):
try:
minOccurenceRatio = float(arg)
except ValueError:
raise RuntimeError, "ratio argument '" + arg + "' is not a float!"
elif opt in ("-h", "--help"):
printUsage(sys.argv[0])
sys.exit(1)
# all remaining arguments are files
files = args
if len(files) == 0:
printUsage(sys.argv[0])
raise RuntimeError, "no files specified!"
# parse tag dumps
tagSet = defaultdict(float)
for file in files:
print "parsing file", file
file = open(file, "r")
for line in file:
line = line.rstrip("\n")
ratio, name = line.split("\t")
ratio = float(ratio)
if name not in tagSet:
tagSet[name] = ratio
else:
tagSet[name] = max(ratio, tagSet[name])
file.close()
# compare each tag with each other one
print "searching for similar tags (this will take some time)"
print "note: reported occurence ratios are the per user ratios and not the global last.fm ratios!"
for tag, otherTag in combinations(tagSet, 2):
similarityRatio = None
if not fast:
similarityRatio = difflib.SequenceMatcher(None, tag, otherTag).ratio()
else:
similarityRatio = difflib.SequenceMatcher(None, tag, otherTag).quick_ratio()
if similarityRatio >= minSimilarityRatio:
tagOccurenceRatio = tagSet[tag]
otherTagOccurenceRatio = tagSet[otherTag]
if tagOccurenceRatio >= otherTagOccurenceRatio:
moreCommonTag, moreCommonTagOccurenceRatio = tag, tagOccurenceRatio
lessCommonTag, lessCommonTagOccurenceRatio = otherTag, otherTagOccurenceRatio
else:
moreCommonTag, moreCommonTagOccurenceRatio = otherTag, otherTagOccurenceRatio
lessCommonTag, lessCommonTagOccurenceRatio = tag, tagOccurenceRatio
if moreCommonTagOccurenceRatio >= minOccurenceRatio:
print "'%s' (%s%%) and '%s' (%s%%) have a similarity ratio of %s" % (moreCommonTag, moreCommonTagOccurenceRatio, lessCommonTag, lessCommonTagOccurenceRatio, similarityRatio)