# Load packages
import requests
import pymupdf
from textblob import TextBlob
# Download the data
url = "https://funnyengwish.wordpress.com/wp-content/uploads/2017/05/pratchett_terry_wyrd_sisters_-_royallib_ru.pdf"
response = requests.get(url)
# Extract data from pdf
data = response.content
doc = pymupdf.Document(stream=data)
# Create text from first pdf page
page1 = doc[0].get_text()
# Turn text into TextBlob
text = TextBlob(page1)Text normalization
TextBlob allows you to transform text—something very useful in preparation for text analysis.
Case
There are methods to change the case of TextBlob objects.
For example, capitalization (let’s only print the first 1000 characters)
print(text.title()[:1000])
Terry Pratchett
Wyrd Sisters
(Starring Three Witches, Also Kings, Daggers, Crowns, Storms, Dwarfs, Cats, Ghosts, Spectres,
Apes, Bandits, Demons, Forests, Heirs, Jesters, Tortures, Trolls, Turntables, General Rejoicing And
Drivers Alarums.)
The Wind Howled. Lightning Stabbed At The Earth Erratically, Like An Inefficient Assassin.
Thunder Rolled Back And Forth Across The Dark, Rain-Lashed Hills.
The Night Was As Black As The Inside Of A Cat. It Was The Kind Of Night, You Could Believe, On
Which Gods Moved Men As Though They Were Pawns On The Chessboard Of Fate. In The Middle Of This
Elemental Storm A Fire Gleamed Among The Dripping Furze Bushes Like The Madness In A Weasel'S Eye.
It Illuminated Three Hunched Figures. As The Cauldron Bubbled An Eldritch Voice Shrieked: 'When
Shall We Three Meet Again?'
There Was A Pause.
Finally Another Voice Said, In Far More Ordinary Tones: 'Well, I Can Do Next Tuesday.'
Through The Fathomless Deeps Of Space Swims The Star TurtOr transformation to upper case:
print(text.upper()[:1000])
TERRY PRATCHETT
WYRD SISTERS
(STARRING THREE WITCHES, ALSO KINGS, DAGGERS, CROWNS, STORMS, DWARFS, CATS, GHOSTS, SPECTRES,
APES, BANDITS, DEMONS, FORESTS, HEIRS, JESTERS, TORTURES, TROLLS, TURNTABLES, GENERAL REJOICING AND
DRIVERS ALARUMS.)
THE WIND HOWLED. LIGHTNING STABBED AT THE EARTH ERRATICALLY, LIKE AN INEFFICIENT ASSASSIN.
THUNDER ROLLED BACK AND FORTH ACROSS THE DARK, RAIN-LASHED HILLS.
THE NIGHT WAS AS BLACK AS THE INSIDE OF A CAT. IT WAS THE KIND OF NIGHT, YOU COULD BELIEVE, ON
WHICH GODS MOVED MEN AS THOUGH THEY WERE PAWNS ON THE CHESSBOARD OF FATE. IN THE MIDDLE OF THIS
ELEMENTAL STORM A FIRE GLEAMED AMONG THE DRIPPING FURZE BUSHES LIKE THE MADNESS IN A WEASEL'S EYE.
IT ILLUMINATED THREE HUNCHED FIGURES. AS THE CAULDRON BUBBLED AN ELDRITCH VOICE SHRIEKED: 'WHEN
SHALL WE THREE MEET AGAIN?'
THERE WAS A PAUSE.
FINALLY ANOTHER VOICE SAID, IN FAR MORE ORDINARY TONES: 'WELL, I CAN DO NEXT TUESDAY.'
THROUGH THE FATHOMLESS DEEPS OF SPACE SWIMS THE STAR TURTNumber
The number (singular/plural) of particular words can also be changed:
print(text.words[6])
print(text.words[6].singularize())Witches
Witchprint(text.words[42])
print(text.words[42].pluralize())assassin
assassinsLemmatization
Lemmatization reduces all words to their lemma (dictionary or canonical form) so that inflected words such as “dog” and “dogs” aren’t counted in separate categories in analyses.
Nouns
The lemmatize method uses as its default argument "n" (for noun):
print(TextBlob("heirs").words[0].lemmatize())
print(TextBlob("daggers").words[0].lemmatize())--------------------------------------------------------------------------- LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:85, in LazyCorpusLoader.__load(self) 84 try: ---> 85 root = nltk.data.find(f"{self.subdir}/{zip_name}") 86 except LookupError: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet.zip/wordnet/' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** During handling of the above exception, another exception occurred: LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:46, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 45 try: ---> 46 return func(*args, **kwargs) 47 except LookupError as error: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/blob.py:133, in Word.lemmatize(self, pos) 132 if pos is None: --> 133 tag = _wordnet.NOUN 134 elif pos in _wordnet._FILEMAP.keys(): File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:129, in LazyCorpusLoader.__getattr__(self, attr) 125 raise AttributeError( 126 f"{type(self).__name__} object has no attribute {attr!r}" 127 ) --> 129 self.__load() 130 # This looks circular, but its not, since __load() changes our 131 # __class__ to something new: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:87, in LazyCorpusLoader.__load(self) 86 except LookupError: ---> 87 raise e 89 # Load the corpus. File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:82, in LazyCorpusLoader.__load(self) 81 try: ---> 82 root = nltk.data.find(f"{self.subdir}/{self.__name}") 83 except LookupError as e: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** The above exception was the direct cause of the following exception: MissingCorpusError Traceback (most recent call last) Cell In[6], line 1 ----> 1 print(TextBlob("heirs").words[0].lemmatize()) 2 print(TextBlob("daggers").words[0].lemmatize()) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:48, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 46 return func(*args, **kwargs) 47 except LookupError as error: ---> 48 raise MissingCorpusError() from error MissingCorpusError: Looks like you are missing some required data for this feature. To download the necessary data, simply run python -m textblob.download_corpora or use the NLTK downloader to download the missing data: http://nltk.org/data.html If this doesn't fix the problem, file an issue at https://github.com/sloria/TextBlob/issues.
Be careful: you can’t always trust that TextBlob will work properly. It is a library very easy to use, but it has its limitations.
For instance, I am not sure why this one doesn’t work:
print(TextBlob("men").words[0].lemmatize())--------------------------------------------------------------------------- LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:85, in LazyCorpusLoader.__load(self) 84 try: ---> 85 root = nltk.data.find(f"{self.subdir}/{zip_name}") 86 except LookupError: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet.zip/wordnet/' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** During handling of the above exception, another exception occurred: LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:46, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 45 try: ---> 46 return func(*args, **kwargs) 47 except LookupError as error: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/blob.py:133, in Word.lemmatize(self, pos) 132 if pos is None: --> 133 tag = _wordnet.NOUN 134 elif pos in _wordnet._FILEMAP.keys(): File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:129, in LazyCorpusLoader.__getattr__(self, attr) 125 raise AttributeError( 126 f"{type(self).__name__} object has no attribute {attr!r}" 127 ) --> 129 self.__load() 130 # This looks circular, but its not, since __load() changes our 131 # __class__ to something new: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:87, in LazyCorpusLoader.__load(self) 86 except LookupError: ---> 87 raise e 89 # Load the corpus. File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:82, in LazyCorpusLoader.__load(self) 81 try: ---> 82 root = nltk.data.find(f"{self.subdir}/{self.__name}") 83 except LookupError as e: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** The above exception was the direct cause of the following exception: MissingCorpusError Traceback (most recent call last) Cell In[7], line 1 ----> 1 print(TextBlob("men").words[0].lemmatize()) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:48, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 46 return func(*args, **kwargs) 47 except LookupError as error: ---> 48 raise MissingCorpusError() from error MissingCorpusError: Looks like you are missing some required data for this feature. To download the necessary data, simply run python -m textblob.download_corpora or use the NLTK downloader to download the missing data: http://nltk.org/data.html If this doesn't fix the problem, file an issue at https://github.com/sloria/TextBlob/issues.
While this totally works:
print(TextBlob("policemen").words[0].lemmatize())--------------------------------------------------------------------------- LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:85, in LazyCorpusLoader.__load(self) 84 try: ---> 85 root = nltk.data.find(f"{self.subdir}/{zip_name}") 86 except LookupError: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet.zip/wordnet/' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** During handling of the above exception, another exception occurred: LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:46, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 45 try: ---> 46 return func(*args, **kwargs) 47 except LookupError as error: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/blob.py:133, in Word.lemmatize(self, pos) 132 if pos is None: --> 133 tag = _wordnet.NOUN 134 elif pos in _wordnet._FILEMAP.keys(): File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:129, in LazyCorpusLoader.__getattr__(self, attr) 125 raise AttributeError( 126 f"{type(self).__name__} object has no attribute {attr!r}" 127 ) --> 129 self.__load() 130 # This looks circular, but its not, since __load() changes our 131 # __class__ to something new: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:87, in LazyCorpusLoader.__load(self) 86 except LookupError: ---> 87 raise e 89 # Load the corpus. File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:82, in LazyCorpusLoader.__load(self) 81 try: ---> 82 root = nltk.data.find(f"{self.subdir}/{self.__name}") 83 except LookupError as e: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** The above exception was the direct cause of the following exception: MissingCorpusError Traceback (most recent call last) Cell In[8], line 1 ----> 1 print(TextBlob("policemen").words[0].lemmatize()) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:48, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 46 return func(*args, **kwargs) 47 except LookupError as error: ---> 48 raise MissingCorpusError() from error MissingCorpusError: Looks like you are missing some required data for this feature. To download the necessary data, simply run python -m textblob.download_corpora or use the NLTK downloader to download the missing data: http://nltk.org/data.html If this doesn't fix the problem, file an issue at https://github.com/sloria/TextBlob/issues.
Using the more complex and more powerful NLTK Python library, you can implement the solution suggested here.
Verbs
To lemmatize verbs, you need to pass "v" (for verbs) to the lemmatize method:
print(TextBlob("seen").words[0].lemmatize("v"))
print(TextBlob("seeing").words[0].lemmatize("v"))
print(TextBlob("sees").words[0].lemmatize("v"))--------------------------------------------------------------------------- LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:85, in LazyCorpusLoader.__load(self) 84 try: ---> 85 root = nltk.data.find(f"{self.subdir}/{zip_name}") 86 except LookupError: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet.zip/wordnet/' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** During handling of the above exception, another exception occurred: LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:46, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 45 try: ---> 46 return func(*args, **kwargs) 47 except LookupError as error: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/blob.py:134, in Word.lemmatize(self, pos) 133 tag = _wordnet.NOUN --> 134 elif pos in _wordnet._FILEMAP.keys(): 135 tag = pos File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:129, in LazyCorpusLoader.__getattr__(self, attr) 125 raise AttributeError( 126 f"{type(self).__name__} object has no attribute {attr!r}" 127 ) --> 129 self.__load() 130 # This looks circular, but its not, since __load() changes our 131 # __class__ to something new: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:87, in LazyCorpusLoader.__load(self) 86 except LookupError: ---> 87 raise e 89 # Load the corpus. File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:82, in LazyCorpusLoader.__load(self) 81 try: ---> 82 root = nltk.data.find(f"{self.subdir}/{self.__name}") 83 except LookupError as e: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** The above exception was the direct cause of the following exception: MissingCorpusError Traceback (most recent call last) Cell In[9], line 1 ----> 1 print(TextBlob("seen").words[0].lemmatize("v")) 2 print(TextBlob("seeing").words[0].lemmatize("v")) 3 print(TextBlob("sees").words[0].lemmatize("v")) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:48, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 46 return func(*args, **kwargs) 47 except LookupError as error: ---> 48 raise MissingCorpusError() from error MissingCorpusError: Looks like you are missing some required data for this feature. To download the necessary data, simply run python -m textblob.download_corpora or use the NLTK downloader to download the missing data: http://nltk.org/data.html If this doesn't fix the problem, file an issue at https://github.com/sloria/TextBlob/issues.
Your turn:
Why is this one not working?
print(TextBlob("saw").words[0].lemmatize("v"))--------------------------------------------------------------------------- LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:85, in LazyCorpusLoader.__load(self) 84 try: ---> 85 root = nltk.data.find(f"{self.subdir}/{zip_name}") 86 except LookupError: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet.zip/wordnet/' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** During handling of the above exception, another exception occurred: LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:46, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 45 try: ---> 46 return func(*args, **kwargs) 47 except LookupError as error: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/blob.py:134, in Word.lemmatize(self, pos) 133 tag = _wordnet.NOUN --> 134 elif pos in _wordnet._FILEMAP.keys(): 135 tag = pos File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:129, in LazyCorpusLoader.__getattr__(self, attr) 125 raise AttributeError( 126 f"{type(self).__name__} object has no attribute {attr!r}" 127 ) --> 129 self.__load() 130 # This looks circular, but its not, since __load() changes our 131 # __class__ to something new: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:87, in LazyCorpusLoader.__load(self) 86 except LookupError: ---> 87 raise e 89 # Load the corpus. File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:82, in LazyCorpusLoader.__load(self) 81 try: ---> 82 root = nltk.data.find(f"{self.subdir}/{self.__name}") 83 except LookupError as e: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** The above exception was the direct cause of the following exception: MissingCorpusError Traceback (most recent call last) Cell In[10], line 1 ----> 1 print(TextBlob("saw").words[0].lemmatize("v")) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:48, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 46 return func(*args, **kwargs) 47 except LookupError as error: ---> 48 raise MissingCorpusError() from error MissingCorpusError: Looks like you are missing some required data for this feature. To download the necessary data, simply run python -m textblob.download_corpora or use the NLTK downloader to download the missing data: http://nltk.org/data.html If this doesn't fix the problem, file an issue at https://github.com/sloria/TextBlob/issues.
Examples from the text:
print(TextBlob("starring").words[0].lemmatize("v"))
print(TextBlob("stabbed").words[0].lemmatize("v"))
print(TextBlob("howled").words[0].lemmatize("v"))
print(TextBlob("rejoicing").words[0].lemmatize("v"))--------------------------------------------------------------------------- LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:85, in LazyCorpusLoader.__load(self) 84 try: ---> 85 root = nltk.data.find(f"{self.subdir}/{zip_name}") 86 except LookupError: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet.zip/wordnet/' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** During handling of the above exception, another exception occurred: LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:46, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 45 try: ---> 46 return func(*args, **kwargs) 47 except LookupError as error: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/blob.py:134, in Word.lemmatize(self, pos) 133 tag = _wordnet.NOUN --> 134 elif pos in _wordnet._FILEMAP.keys(): 135 tag = pos File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:129, in LazyCorpusLoader.__getattr__(self, attr) 125 raise AttributeError( 126 f"{type(self).__name__} object has no attribute {attr!r}" 127 ) --> 129 self.__load() 130 # This looks circular, but its not, since __load() changes our 131 # __class__ to something new: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:87, in LazyCorpusLoader.__load(self) 86 except LookupError: ---> 87 raise e 89 # Load the corpus. File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:82, in LazyCorpusLoader.__load(self) 81 try: ---> 82 root = nltk.data.find(f"{self.subdir}/{self.__name}") 83 except LookupError as e: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** The above exception was the direct cause of the following exception: MissingCorpusError Traceback (most recent call last) Cell In[11], line 1 ----> 1 print(TextBlob("starring").words[0].lemmatize("v")) 2 print(TextBlob("stabbed").words[0].lemmatize("v")) 3 print(TextBlob("howled").words[0].lemmatize("v")) 4 print(TextBlob("rejoicing").words[0].lemmatize("v")) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:48, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 46 return func(*args, **kwargs) 47 except LookupError as error: ---> 48 raise MissingCorpusError() from error MissingCorpusError: Looks like you are missing some required data for this feature. To download the necessary data, simply run python -m textblob.download_corpora or use the NLTK downloader to download the missing data: http://nltk.org/data.html If this doesn't fix the problem, file an issue at https://github.com/sloria/TextBlob/issues.
Adjectives
To lemmatize adjectives, you need to pass "a" (for adjectives) to the lemmatize method:
print(TextBlob("youngest").words[0].lemmatize("a"))--------------------------------------------------------------------------- LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:85, in LazyCorpusLoader.__load(self) 84 try: ---> 85 root = nltk.data.find(f"{self.subdir}/{zip_name}") 86 except LookupError: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet.zip/wordnet/' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** During handling of the above exception, another exception occurred: LookupError Traceback (most recent call last) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:46, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 45 try: ---> 46 return func(*args, **kwargs) 47 except LookupError as error: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/blob.py:134, in Word.lemmatize(self, pos) 133 tag = _wordnet.NOUN --> 134 elif pos in _wordnet._FILEMAP.keys(): 135 tag = pos File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:129, in LazyCorpusLoader.__getattr__(self, attr) 125 raise AttributeError( 126 f"{type(self).__name__} object has no attribute {attr!r}" 127 ) --> 129 self.__load() 130 # This looks circular, but its not, since __load() changes our 131 # __class__ to something new: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:87, in LazyCorpusLoader.__load(self) 86 except LookupError: ---> 87 raise e 89 # Load the corpus. File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/corpus/util.py:82, in LazyCorpusLoader.__load(self) 81 try: ---> 82 root = nltk.data.find(f"{self.subdir}/{self.__name}") 83 except LookupError as e: File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/nltk/data.py:738, in find(resource_name, paths) 737 resource_not_found = f"\n{sep}\n{msg}\n{sep}\n" --> 738 raise LookupError(resource_not_found) LookupError: ********************************************************************** Resource 'wordnet' not found. Please use the NLTK Downloader to obtain the resource: >>> import nltk >>> nltk.download('wordnet') For more information see: https://www.nltk.org/data.html Attempted to load 'corpora/wordnet' Searched in: - '/home/marie/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/share/nltk_data' - '/home/marie/parvus/prog/mint/python/.venv/lib/nltk_data' - '/usr/share/nltk_data' - '/usr/local/share/nltk_data' - '/usr/lib/nltk_data' - '/usr/local/lib/nltk_data' ********************************************************************** The above exception was the direct cause of the following exception: MissingCorpusError Traceback (most recent call last) Cell In[12], line 1 ----> 1 print(TextBlob("youngest").words[0].lemmatize("a")) File ~/parvus/prog/mint/python/.venv/lib/python3.14/site-packages/textblob/decorators.py:48, in requires_nltk_corpus.<locals>.decorated(*args, **kwargs) 46 return func(*args, **kwargs) 47 except LookupError as error: ---> 48 raise MissingCorpusError() from error MissingCorpusError: Looks like you are missing some required data for this feature. To download the necessary data, simply run python -m textblob.download_corpora or use the NLTK downloader to download the missing data: http://nltk.org/data.html If this doesn't fix the problem, file an issue at https://github.com/sloria/TextBlob/issues.
Correction
The correct method attempts to correct spelling mistakes:
print(TextBlob("Somethingg with speling mystakes").correct())Something with spelling mistakesThere are however limitations since the method is based on a lexicon and isn’t aware of the relationship between words (and thus cannot correct grammatical errors):
print(TextBlob("Some thingg with speling mystake").correct())Some things with spelling mistakeAn example even more obvious:
print(TextBlob("He drink").correct())He drink