185 lines
8.9 KiB
Plaintext
185 lines
8.9 KiB
Plaintext
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=======================
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CHILDES Corpus Readers
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=======================
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Read the XML version of the CHILDES corpus.
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How to use CHILDESCorpusReader
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==============================
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Read the CHILDESCorpusReader class and read the CHILDES corpus saved in
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the nltk_data directory.
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>>> import nltk
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>>> from nltk.corpus.reader import CHILDESCorpusReader
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>>> corpus_root = nltk.data.find('corpora/childes/data-xml/Eng-USA-MOR/')
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Reading files in the Valian corpus (Valian, 1991).
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>>> valian = CHILDESCorpusReader(corpus_root, 'Valian/.*.xml')
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>>> valian.fileids()
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['Valian/01a.xml', 'Valian/01b.xml', 'Valian/02a.xml', 'Valian/02b.xml',...
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Count the number of files
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>>> len(valian.fileids())
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43
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Printing properties of the corpus files.
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>>> corpus_data = valian.corpus(valian.fileids())
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>>> print(corpus_data[0]['Lang'])
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eng
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>>> for key in sorted(corpus_data[0].keys()):
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... print(key, ": ", corpus_data[0][key])
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Corpus : valian
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Date : 1986-03-04
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Id : 01a
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Lang : eng
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Version : 2.0.1
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{http://www.w3.org/2001/XMLSchema-instance}schemaLocation : http://www.talkbank.org/ns/talkbank http://talkbank.org/software/talkbank.xsd
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Printing information of participants of the corpus. The most common codes for
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the participants are 'CHI' (target child), 'MOT' (mother), and 'INV' (investigator).
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>>> corpus_participants = valian.participants(valian.fileids())
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>>> for this_corpus_participants in corpus_participants[:2]:
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... for key in sorted(this_corpus_participants.keys()):
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... dct = this_corpus_participants[key]
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... print(key, ": ", [(k, dct[k]) for k in sorted(dct.keys())])
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CHI : [('age', 'P2Y1M3D'), ('group', 'normal'), ('id', 'CHI'), ('language', 'eng'), ('role', 'Target_Child'), ('sex', 'female')]
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INV : [('id', 'INV'), ('language', 'eng'), ('role', 'Investigator')]
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MOT : [('id', 'MOT'), ('language', 'eng'), ('role', 'Mother')]
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CHI : [('age', 'P2Y1M12D'), ('group', 'normal'), ('id', 'CHI'), ('language', 'eng'), ('role', 'Target_Child'), ('sex', 'female')]
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INV : [('id', 'INV'), ('language', 'eng'), ('role', 'Investigator')]
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MOT : [('id', 'MOT'), ('language', 'eng'), ('role', 'Mother')]
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printing words.
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>>> valian.words('Valian/01a.xml')
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['at', 'Parent', "Lastname's", 'house', 'with', 'Child', 'Lastname', ...
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printing sentences.
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>>> valian.sents('Valian/01a.xml')
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[['at', 'Parent', "Lastname's", 'house', 'with', 'Child', 'Lastname',
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'and', 'it', 'is', 'March', 'fourth', 'I', 'believe', 'and', 'when',
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'was', "Parent's", 'birthday'], ["Child's"], ['oh', "I'm", 'sorry'],
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["that's", 'okay'], ...
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You can specify the participants with the argument *speaker*.
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>>> valian.words('Valian/01a.xml',speaker=['INV'])
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['at', 'Parent', "Lastname's", 'house', 'with', 'Child', 'Lastname', ...
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>>> valian.words('Valian/01a.xml',speaker=['MOT'])
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["Child's", "that's", 'okay', 'February', 'first', 'nineteen', ...
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>>> valian.words('Valian/01a.xml',speaker=['CHI'])
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['tape', 'it', 'up', 'and', 'two', 'tape', 'players', 'have',...
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tagged_words() and tagged_sents() return the usual (word,pos) tuple lists.
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POS tags in the CHILDES are automatically assigned by MOR and POST programs
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(MacWhinney, 2000).
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>>> valian.tagged_words('Valian/01a.xml')[:30]
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[('at', 'prep'), ('Parent', 'n:prop'), ("Lastname's", 'n:prop'), ('house', 'n'),
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('with', 'prep'), ('Child', 'n:prop'), ('Lastname', 'n:prop'), ('and', 'coord'),
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('it', 'pro'), ('is', 'v:cop'), ('March', 'n:prop'), ('fourth', 'adj'),
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('I', 'pro:sub'), ('believe', 'v'), ('and', 'coord'), ('when', 'adv:wh'),
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('was', 'v:cop'), ("Parent's", 'n:prop'), ('birthday', 'n'), ("Child's", 'n:prop'),
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('oh', 'co'), ("I'm", 'pro:sub'), ('sorry', 'adj'), ("that's", 'pro:dem'),
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('okay', 'adj'), ('February', 'n:prop'), ('first', 'adj'),
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('nineteen', 'det:num'), ('eighty', 'det:num'), ('four', 'det:num')]
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>>> valian.tagged_sents('Valian/01a.xml')[:10]
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[[('at', 'prep'), ('Parent', 'n:prop'), ("Lastname's", 'n:prop'), ('house', 'n'),
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('with', 'prep'), ('Child', 'n:prop'), ('Lastname', 'n:prop'), ('and', 'coord'),
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('it', 'pro'), ('is', 'v:cop'), ('March', 'n:prop'), ('fourth', 'adj'),
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('I', 'pro:sub'), ('believe', 'v'), ('and', 'coord'), ('when', 'adv:wh'),
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('was', 'v:cop'), ("Parent's", 'n:prop'), ('birthday', 'n')],
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[("Child's", 'n:prop')], [('oh', 'co'), ("I'm", 'pro:sub'), ('sorry', 'adj')],
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[("that's", 'pro:dem'), ('okay', 'adj')],
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[('February', 'n:prop'), ('first', 'adj'), ('nineteen', 'det:num'),
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('eighty', 'det:num'), ('four', 'det:num')],
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[('great', 'adj')],
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[('and', 'coord'), ("she's", 'pro:sub'), ('two', 'det:num'), ('years', 'n'), ('old', 'adj')],
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[('correct', 'adj')],
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[('okay', 'co')], [('she', 'pro:sub'), ('just', 'adv:int'), ('turned', 'part'), ('two', 'det:num'),
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('a', 'det'), ('month', 'n'), ('ago', 'adv')]]
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When the argument *stem* is true, the word stems (e.g., 'is' -> 'be-3PS') are
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used instread of the original words.
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>>> valian.words('Valian/01a.xml')[:30]
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['at', 'Parent', "Lastname's", 'house', 'with', 'Child', 'Lastname', 'and', 'it', 'is', ...
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>>> valian.words('Valian/01a.xml',stem=True)[:30]
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['at', 'Parent', 'Lastname', 's', 'house', 'with', 'Child', 'Lastname', 'and', 'it', 'be-3S', ...
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When the argument *replace* is true, the replaced words are used instread of
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the original words.
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>>> valian.words('Valian/01a.xml',speaker='CHI')[247]
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'tikteat'
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>>> valian.words('Valian/01a.xml',speaker='CHI',replace=True)[247]
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'trick'
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When the argument *relation* is true, the relational relationships in the
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sentence are returned. See Sagae et al. (2010) for details of the relational
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structure adopted in the CHILDES.
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>>> valian.words('Valian/01a.xml',relation=True)[:10]
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[[('at', 'prep', '1|0|ROOT'), ('Parent', 'n', '2|5|VOC'), ('Lastname', 'n', '3|5|MOD'), ('s', 'poss', '4|5|MOD'), ('house', 'n', '5|1|POBJ'), ('with', 'prep', '6|1|JCT'), ('Child', 'n', '7|8|NAME'), ('Lastname', 'n', '8|6|POBJ'), ('and', 'coord', '9|8|COORD'), ('it', 'pro', '10|11|SUBJ'), ('be-3S', 'v', '11|9|COMP'), ('March', 'n', '12|11|PRED'), ('fourth', 'adj', '13|12|MOD'), ('I', 'pro', '15|16|SUBJ'), ('believe', 'v', '16|14|ROOT'), ('and', 'coord', '18|17|ROOT'), ('when', 'adv', '19|20|PRED'), ('be-PAST', 'v', '20|18|COMP'), ('Parent', 'n', '21|23|MOD'), ('s', 'poss', '22|23|MOD'), ('birth', 'n', '23|20|SUBJ')], [('Child', 'n', '1|2|MOD'), ('s', 'poss', '2|0|ROOT')], [('oh', 'co', '1|4|COM'), ('I', 'pro', '3|4|SUBJ'), ('be', 'v', '4|0|ROOT'), ('sorry', 'adj', '5|4|PRED')], [('that', 'pro', '1|2|SUBJ'), ('be', 'v', '2|0|ROOT'), ('okay', 'adj', '3|2|PRED')], [('February', 'n', '1|6|VOC'), ('first', 'adj', '2|6|ENUM'), ('nineteen', 'det', '4|6|ENUM'), ('eighty', 'det', '5|6|ENUM'), ('four', 'det', '6|0|ROOT')], [('great', 'adj', '1|0|ROOT')], [('and', 'coord', '1|0|ROOT'), ('she', 'pro', '2|1|ROOT'), ('be', 'aux', '3|5|AUX'), ('two', 'det', '4|5|QUANT'), ('year-PL', 'n', '5|2|ROOT'), ('old', 'adj', '6|5|MOD')], [('correct', 'adj', '1|0|ROOT')], [('okay', 'co', '1|0|ROOT')], [('she', 'pro', '1|0|ROOT'), ('just', 'adv', '2|3|JCT'), ('turn-PERF', 'part', '3|1|XCOMP'), ('two', 'det', '4|6|QUANT'), ('a', 'det', '5|6|DET'), ('month', 'n', '6|3|OBJ'), ('ago', 'adv', '7|3|JCT')]]
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Printing age. When the argument *month* is true, the age information in
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the CHILDES format is converted into the number of months.
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>>> valian.age()
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['P2Y1M3D', 'P2Y1M12D', 'P1Y9M21D', 'P1Y9M28D', 'P2Y1M23D', ...
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>>> valian.age('Valian/01a.xml')
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['P2Y1M3D']
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>>> valian.age('Valian/01a.xml',month=True)
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[25]
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Printing MLU. The criteria for the MLU computation is broadly based on
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Brown (1973).
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>>> valian.MLU()
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[2.3574660633484..., 2.292682926829..., 3.492857142857..., 2.961783439490...,
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2.0842696629213..., 3.169811320754..., 3.137404580152..., 3.0578034682080...,
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4.090163934426..., 3.488372093023..., 2.8773584905660..., 3.4792899408284...,
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4.0111940298507..., 3.456790123456..., 4.487603305785..., 4.007936507936...,
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5.25, 5.154696132596..., ...]
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>>> valian.MLU('Valian/01a.xml')
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[2.35746606334...]
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Basic stuff
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==============================
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Count the number of words and sentences of each file.
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>>> valian = CHILDESCorpusReader(corpus_root, 'Valian/.*.xml')
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>>> for this_file in valian.fileids()[:6]:
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... print(valian.corpus(this_file)[0]['Corpus'], valian.corpus(this_file)[0]['Id'])
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... print("num of words: %i" % len(valian.words(this_file)))
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... print("num of sents: %i" % len(valian.sents(this_file)))
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valian 01a
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num of words: 3606
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num of sents: 1027
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valian 01b
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num of words: 4376
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num of sents: 1274
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valian 02a
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num of words: 2673
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num of sents: 801
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valian 02b
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num of words: 5020
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num of sents: 1583
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valian 03a
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num of words: 2743
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num of sents: 988
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valian 03b
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num of words: 4409
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num of sents: 1397
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