What are all possible pos tags of NLTK

Question

How do I find a list with all possible pos tags used by the Natural Language Toolkit  nltk

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LS    TO    VBN    quot    quot    WP    UH    VBG    JJ    VBZ    --    VBP    NN    DT    PRP         WP     NNPS    PRP     WDT                                   RB    RBR    RBS    VBD    IN    FW    RP    JJR    JJS    PDT    MD    VB    WRB    NNP    EX    NNS    SYM    CC    CD    POS    Based on Doug Shore s method but make it more copy-paste friendly

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The below can be useful to access a dict keyed by abbreviations    gt  gt  gt  from nltk data import load  gt  gt  gt  tagdict   load  help tagsets upenn tagset pickle    gt  gt  gt  tagdict  NN   0   noun  common  singular or mass   gt  gt  gt  tagdict keys     PRP     VBG    VBD          VBN               VBP    WDT

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Just run this verbatim    import nltk nltk download  tagsets   nltk help upenn tagset     nltk tag  POS TAGGER won t work  It will give AttributeError  module  nltk tag  has no attribute   POS TAGGER   It s not available in NLTK 3 anymore

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The tag set depends on the corpus that was used to train the tagger   The default tagger of nltk pos tag   uses the Penn Treebank Tag Set    In NLTK 2  you could check which tagger is the default tagger as follows    import nltk nltk tag  POS TAGGER  gt  gt  gt   taggers maxent treebank pos tagger english pickle    That means that it s a Maximum Entropy tagger trained on the Treebank corpus    nltk tag  POS TAGGER does not exist anymore in NLTK 3 but the documentation states that the off-the-shelf tagger still uses the Penn Treebank tagset

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The book has a note how to find help on tag sets  e g    nltk help upenn tagset     Others are probably similar   Note  Maybe you first have to download tagsets from the download helper s Models section for this

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You can download the list here  ftp   ftp cis upenn edu pub treebank doc tagguide ps gz  It includes confusing parts of speech  capitalization  and other conventions  Also  wikipedia has an interesting section similar to this  Section  Part-of-speech tags used

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To save some folks some time  here is a list I extracted from a small corpus   I do not know if it is complete  but it should have most  if not all  of the help definitions from upenn tagset     CC  conjunction  coordinating   amp   n and both but either et for less minus neither nor or plus so therefore times v  versus vs  whether yet   CD  numeral  cardinal  mid-1890 nine-thirty forty-two one-tenth ten million 0 5 one forty- seven 1987 twenty  79 zero two 78-degrees eighty-four IX  60s  025 fifteen 271 124 dozen quintillion DM2 000       DT  determiner  all an another any both del each either every half la many much nary neither no some such that the them these this those   EX  existential there  there   IN  preposition or conjunction  subordinating  astride among uppon whether out inside pro despite on by throughout below within for towards near behind atop around if like until below next into if beside       JJ  adjective or numeral  ordinal  third ill-mannered pre-war regrettable oiled calamitous first separable ectoplasmic battery-powered participatory fourth still-to-be-named multilingual multi-disciplinary       JJR  adjective  comparative  bleaker braver breezier briefer brighter brisker broader bumper busier calmer cheaper choosier cleaner clearer closer colder commoner costlier cozier creamier crunchier cuter       JJS  adjective  superlative  calmest cheapest choicest classiest cleanest clearest closest commonest corniest costliest crassest creepiest crudest cutest darkest deadliest dearest deepest densest dinkiest       LS  list item marker  A A  B B  C C  D E F First G H I J K One SP-44001 SP-44002 SP-44005 SP-44007 Second Third Three Two   a b c d first five four one six three two   MD  modal auxiliary  can cannot could couldn t dare may might must need ought shall should shouldn t will would   NN  noun  common  singular or mass  common-carrier cabbage knuckle-duster Casino afghan shed thermostat investment slide humour falloff slick wind hyena override subhumanity machinist       NNP  noun  proper  singular  Motown Venneboerger Czestochwa Ranzer Conchita Trumplane Christos Oceanside Escobar Kreisler Sawyer Cougar Yvette Ervin ODI Darryl CTCA Shannon A K C  Meltex Liverpool       NNS  noun  common  plural  undergraduates scotches bric-a-brac products bodyguards facets coasts divestitures storehouses designs clubs fragrances averages subjectivists apprehensions muses factory-jobs       PDT  pre-determiner  all both half many quite such sure this   POS  genitive marker     s   PRP  pronoun  personal  hers herself him himself hisself it itself me myself one oneself ours ourselves ownself self she thee theirs them themselves they thou thy us   PRP   pronoun  possessive  her his mine my our ours their thy your   RB  adverb  occasionally unabatingly maddeningly adventurously professedly stirringly prominently technologically magisterially predominately swiftly fiscally pitilessly       RBR  adverb  comparative  further gloomier grander graver greater grimmer harder harsher healthier heavier higher however larger later leaner lengthier less- perfectly lesser lonelier longer louder lower more       RBS  adverb  superlative  best biggest bluntest earliest farthest first furthest hardest heartiest highest largest least less most nearest second tightest worst   RP  particle  aboard about across along apart around aside at away back before behind by crop down ever fast for forth from go high i e  in into just later low more off on open out over per pie raising start teeth that through under unto up up-pp upon whole with you   TO   to  as preposition or infinitive marker  to   UH  interjection  Goodbye Goody Gosh Wow Jeepers Jee-sus Hubba Hey Kee-reist Oops amen huh howdy uh dammit whammo shucks heck anyways whodunnit honey golly man baby diddle hush sonuvabitch       VB  verb  base form  ask assemble assess assign assume atone attention avoid bake balkanize bank begin behold believe bend benefit bevel beware bless boil bomb boost brace break bring broil brush build       VBD  verb  past tense  dipped pleaded swiped regummed soaked tidied convened halted registered cushioned exacted snubbed strode aimed adopted belied figgered speculated wore appreciated contemplated       VBG  verb  present participle or gerund  telegraphing stirring focusing angering judging stalling lactating hankerin  alleging veering capping approaching traveling besieging encrypting interrupting erasing wincing       VBN  verb  past participle  multihulled dilapidated aerosolized chaired languished panelized used experimented flourished imitated reunifed factored condensed sheared unsettled primed dubbed desired       VBP  verb  present tense  not 3rd person singular  predominate wrap resort sue twist spill cure lengthen brush terminate appear tend stray glisten obtain comprise detest tease attract emphasize mold postpone sever return wag       VBZ  verb  present tense  3rd person singular  bases reconstructs marks mixes displeases seals carps weaves snatches slumps stretches authorizes smolders pictures emerges stockpiles seduces fizzes uses bolsters slaps speaks pleads       WDT  WH-determiner  that what whatever which whichever   WP  WH-pronoun  that what whatever whatsoever which who whom whosoever   WRB  Wh-adverb  how however whence whenever where whereby whereever wherein whereof why

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The reference is available at the official site  Copy and pasting from there    CC   Coordinating conjunction   CD   Cardinal number   DT   Determiner   EX   Existential there   FW   Foreign word   IN   Preposition or subordinating conjunction   JJ   Adjective   JJR   Adjective  comparative   JJS   Adjective  superlative   LS   List item marker   MD   Modal   NN   Noun  singular or mass   NNS   Noun  plural   NNP   Proper noun  singular   NNPS   Proper noun  plural   PDT   Predeterminer   POS   Possessive ending   PRP   Personal pronoun   PRP    Possessive pronoun   RB   Adverb   RBR   Adverb  comparative   RBS   Adverb  superlative   RP   Particle   SYM   Symbol   TO   to   UH   Interjection   VB   Verb  base form   VBD   Verb  past tense   VBG   Verb  gerund or present participle   VBN   Verb  past participle   VBP   Verb  non-3rd person singular present   VBZ   Verb  3rd person singular present   WDT   Wh-determiner   WP   Wh-pronoun   WP    Possessive wh-pronoun   WRB   Wh-adverb

[python] What are all possible pos tags of NLTK?

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