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text2liwc.py
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text2liwc.py
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#!/usr/bin/env python3
"""
text2liwc.py: convert lines of untokenized text to vector of liwc features
usage: text2liwc.py < file
20181120 erikt(at)xs4all.nl
"""
from pynlpl.clients.frogclient import FrogClient
import re
import sys
COMMAND = sys.argv.pop(0)
LIWCDIR = "/home/erikt/projects/e-mental-health/liwc/"
LIWCFILE = "Dutch_LIWC2015_Dictionary.dic"
TEXTBOUNDARY = "%"
NBROFTOKENS = "NBROFTOKENS"
NBROFSENTS = "NBROFSENTS"
NBROFMATCHES = "NBROFMATCHES"
MAXPREFIXLEN = 10
FROGPORT = 8080
FROGHOST = "localhost"
TOKENID = 0
LEMMAID = 1
NUMBER = "number"
numberId = -1
def processFrogData(tokenInfo):
tokens = []
nbrOfSents = 0
for token in tokenInfo:
if token[TOKENID] == None: nbrOfSents += 1
else: tokens.append(token[LEMMAID])
if len(tokens) > 0: nbrOfSents += 1
return(tokens,nbrOfSents)
def tokenize(text):
try: frogclient = FrogClient('localhost',FROGPORT,returnall=True)
except Exception as e: sys.exit(COMMAND+": cannot run frog: "+str(e))
tokens,nbrOfSents = processFrogData(frogclient.process(text))
return(tokens,nbrOfSents)
def isNumber(string):
return(string.lstrip("-").replace(".","1").isnumeric())
def readEmpty(inFile):
text = ""
for line in inFile:
line = line.strip()
if line == TEXTBOUNDARY: break
text += line+"\n"
if text != "":
sys.exit(COMMAND+": liwc dictionary starts with unexpected text: "+text)
def readFeatures(inFile):
global numberId
features = {}
for line in inFile:
line = line.strip()
if line == TEXTBOUNDARY: break
fields = line.split()
featureId = fields.pop(0)
featureName = " ".join(fields)
features[featureId] = featureName
if featureName == NUMBER: numberId = featureId
return(features)
def makeUniqueElements(inList):
outList = []
seen = {}
for element in inList:
if not element in seen:
outList.append(element)
seen[element] = True
return(outList)
def readWords(inFile):
words = {}
prefixes = {}
for line in inFile:
line = line.strip()
if line == TEXTBOUNDARY: break
fields = line.split()
word = fields.pop(0).lower()
word = re.sub(r"\*$","",word)
if re.search(r"-$",word):
word = re.sub(r"-$","",word)
if not word in prefixes: prefixes[word] = fields
else: words[word] = makeUniqueElements(words[word]+fields)
else:
if not word in words: words[word] = fields
else: words[word] = makeUniqueElements(words[word]+fields)
return(words,prefixes)
def readLiwc(inFileName):
try: inFile = open(inFileName,"r")
except Exception as e:
sys.exit(COMMAND+": cannot read LIWC dictionary "+inFileName)
readEmpty(inFile)
features = readFeatures(inFile)
words,prefixes = readWords(inFile)
inFile.close()
return(features,words,prefixes)
def findLongestPrefix(prefixes,word):
while not word in prefixes and len(word) > 0:
chars = list(word)
chars.pop(-1)
word = "".join(chars)
return(word)
def addFeatureToCounts(counts,feature):
if feature in counts: counts[feature] += 1
else: counts[feature] = 1
def text2liwc(words,prefixes,tokens):
global numberId
counts = {}
for word in tokens:
if word in words:
addFeatureToCounts(counts,NBROFMATCHES)
for feature in words[word]:
addFeatureToCounts(counts,feature)
longestPrefix = findLongestPrefix(prefixes,word)
if longestPrefix != "":
addFeatureToCounts(counts,NBROFMATCHES)
for feature in prefixes[longestPrefix]:
addFeatureToCounts(counts,feature)
if isNumber(word):
addFeatureToCounts(counts,NBROFMATCHES)
addFeatureToCounts(counts,numberId)
return(counts)
def stdin2liwc(features,words,prefixes):
text = ""
for line in sys.stdin: text += line
tokens,nbrOfSents = tokenize(text)
liwcResults = text2liwc(words,prefixes,tokens)
liwcResults[NBROFTOKENS] = len(tokens)
liwcResults[NBROFSENTS] = nbrOfSents
return(liwcResults)
def printHeader(features):
print(NBROFTOKENS,NBROFMATCHES,NBROFSENTS,sep=",",end="")
for value in features.values():
print(","+value,end="")
print()
def printResults(features,results):
printHeader(features)
print(results[NBROFTOKENS],results[NBROFMATCHES],results[NBROFSENTS],sep=",",end="")
for feature in features:
print(",",end="")
if feature in results: print(results[feature],end="")
else: print(0,end="")
print()
return()
def main(argv):
features,words,prefixes = readLiwc(LIWCDIR+LIWCFILE)
results = stdin2liwc(features,words,prefixes)
printResults(features,results)
if __name__ == "__main__":
sys.exit(main(sys.argv))