python - Absolute position of leaves in NLTK tree -

-

i trying find span (start index, end index) of noun phrase in given sentence. following code extracting noun phrases

sent=nltk.word_tokenize(a) sent_pos=nltk.pos_tag(sent) grammar = r"""     nbar:         {<nn.*|jj>*<nn.*>}  # nouns , adjectives, terminated nouns      np:         {<nbar>}         {<nbar><in><nbar>}  # above, connected in/of/etc...     vp:         {<vbd><pp>?}         {<vbz><pp>?}         {<vb><pp>?}         {<vbn><pp>?}         {<vbg><pp>?}         {<vbp><pp>?} """  cp = nltk.regexpparser(grammar) result = cp.parse(sent_pos) nounphrases = [] subtree in result.subtrees(filter=lambda t: t.label() == 'np'):   np = ''   x in subtree.leaves():     np = np + ' ' + x[0]   nounphrases.append(np.strip())

for a = "the american civil war, known war between states or civil war, civil war fought 1861 1865 in united states after several southern slave states declared secession , formed confederate states of america.", noun phrases extracted are

['american civil war', 'war', 'states', 'civil war', 'civil war fought', 'united states', 'several southern', 'states', 'secession', 'confederate states', 'america'].

now need find span (start position , end position of phrase) of noun phrases. example, span of above noun phrases

[(1,3), (9,9), (12, 12), (16, 17), (21, 23), ....].

i'm new nltk , i've looked http://www.nltk.org/_modules/nltk/tree.html. tried use tree.treepositions() couldn't manage extract absolute positions using these indices. appreciated. thank you!

there isn't implicit function returns offsets of strings/tokens highlighted https://github.com/nltk/nltk/issues/1214

but can use ngram searcher used ribes score https://github.com/nltk/nltk/blob/develop/nltk/translate/ribes_score.py#l123 

>>> nltk import word_tokenize >>> nltk.translate.ribes_score import position_of_ngram >>> s = word_tokenize("the american civil war, known war between states or civil war, civil war fought 1861 1865 in united states after several southern slave states declared secession , formed confederate states of america.") >>> position_of_ngram(tuple('american civil war'.split()), s) 1 >>> position_of_ngram(tuple('confederate states of america'.split()), s) 43

(it returns starting position of query ngram)


Comments

Post a Comment

Popular posts from this blog

javascript - How to get current YouTube IDs via iMacros? -

-
i want viewed youtube video id , save csv via imacros, gets nothing. here js code: var videoid; videoid ="code:"; videoid +="url goto=https://www.youtube.com/watch?v=dbnywxdz_pa"+"\n"; videoid +="add !extract {{!urlcurrent}}"+"\n"; videoid +="set !var1 eval(\"var s=\"{{!urlcurrent}}\"; s.match((?<=watch\\?v=|/videos/|embed\\/)[^#\\&\\?]*);s[0]; \")"+"\n"; videoid +="add !extract {{!var1}}"+"\n"; videoid +="saveas type=extract folder=* file=url.csv"+"\n"; try this: var videoid = "url goto=https://www.youtube.com/watch?v=dbnywxdz_pa" + "\n"; videoid += "set !extract {{!urlcurrent}}" + "\n"; videoid += 'set !extract eval("\'{{!extract}}\'.match(/v=(.{11})/)[1];")' + "\n"; videoid += "saveas type=extract folder=* file=url.csv" + "\n"; iimplay
Read more

c# - Maintaining a program folder in program files out of date? -

-
for program i'm writing in vs c# wpf need store user related information on user's computer. far knew has been done creating folder in c:\program files , adding whatever program related info folder in subfolders or whatever. after doing browsing came across lot of people saying method out of date because access may denied create folder there, works administrative accounts, etc.. 1 site suggested saving c:\users\username\appdata\roaming or c:\users\username\appdata\local. question best , date method saving program data users computer? also take @ msdn article . it uwp apps have general idea put if developing wpf app. you may need these folders: environment.specialfolder.applicationdata environment.specialfolder.localapplicationdata environment.specialfolder.commonapplicationdata
Read more

emulation - Android map show my location didn't work -

-
i have been struggle current location in google map, tried official map demo, not working also. shows getmylocation button on upper right, didn't show blue dot on map current location. here code , i'm using emulator target api 23, guess may emulator's problem since code download directly github. advice appreciated. [screenshot][1] package com.example.mapdemo; import com.google.android.gms.maps.googlemap; import com.google.android.gms.maps.googlemap.onmylocationbuttonclicklistener; import com.google.android.gms.maps.onmapreadycallback; import com.google.android.gms.maps.supportmapfragment; import android.manifest; import android.content.pm.packagemanager; import android.os.bundle; import android.support.annotation.nonnull; import android.support.v4.app.activitycompat; import android.support.v4.content.contextcompat; import android.support.v7.app.appcompatactivity; import android.widget.toast; /** * demo
Read more