Skip to content

Added subroutine to run an NLTK Stemmer #149

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from Feb 14, 2017
Merged

Added subroutine to run an NLTK Stemmer #149

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
2a30052
Added subroutine to run an NLTK Stemmer
nikulshr Feb 1, 2017
9880c6a
Added NLTK Stemmer + test functions
nikulshr Feb 3, 2017
e887f46
Added NLTK Stemmer + tests
nikulshr Feb 9, 2017
cb0c468
Fixed NLTK Stemmer
nikulshr Feb 13, 2017
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 12 additions & 0 deletions tests/test_blob.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -101,6 +101,10 @@ def test_lemmatize(self):
wl = tb.WordList(["cat", "dogs", "oxen"])
assert_equal(wl.lemmatize(), tb.WordList(['cat', 'dog', 'ox']))

def test_stem(self): #only PorterStemmer tested
wl = tb.WordList(["cat", "dogs", "oxen"])
assert_equal(wl.stem(), tb.WordList(['cat', 'dog', 'oxen']))

def test_upper(self):
wl = tb.WordList(self.words)
assert_equal(wl.upper(), tb.WordList([w.upper() for w in self.words]))
Expand Down Expand Up @@ -914,6 +918,14 @@ def test_lemma(self):
w = tb.Word("went", "VBD");
assert_equal(w.lemma, "go")

def test_stem(self): #only PorterStemmer tested
w = tb.Word("cars")
assert_equal(w.stem(), "car")
w = tb.Word("wolves")
assert_equal(w.stem(), "wolv")
w = tb.Word("went")
assert_equal(w.stem(), "went")

def test_synsets(self):
w = tb.Word("car")
assert_true(isinstance(w.synsets, (list, tuple)))
Expand Down
13 changes: 13 additions & 0 deletions textblob/blob.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -148,6 +148,19 @@ def lemmatize(self, pos=None):
lemmatizer = nltk.stem.WordNetLemmatizer()
return lemmatizer.lemmatize(self.string, pos)

PorterStemmer = nltk.stem.porter.PorterStemmer()
LancasterStemmer = nltk.stem.lancaster.LancasterStemmer()
SnowballStemmer = nltk.stem.snowball.SnowballStemmer("english")

#added 'stemmer' on lines of lemmatizer
#based on nltk
def stem(self, stemmer=PorterStemmer):
"""Stem a word using various NLTK stemmers. (Default: Porter Stemmer)

.. versionadded:: 0.12.0
"""
return stemmer.stem(self.string)

@cached_property
def synsets(self):
"""The list of Synset objects for this Word.
Expand Down