Python Forum

In the following code snippet:

# Instantiate the sentiment intensity analyzer
vader = SentimentIntensityAnalyzer()

# Set column names
columns = ['ticker', 'date', 'time', 'headline']

# Convert the parsed_news list into a DataFrame called 'parsed_and_scored_news'
parsed_and_scored_news = pd.DataFrame(parsed_news, columns=columns)

# Iterate through the headlines and get the polarity scores using vader
scores = parsed_and_scored_news['headline'].apply(vader.polarity_scores).tolist()

# Convert the 'scores' list of dicts into a DataFrame
scores_df = pd.DataFrame(scores)

# Join the DataFrames of the news and the list of dicts
parsed_and_scored_news = parsed_and_scored_news.join(scores_df, rsuffix='_right')

# Convert the date column from string to datetime
parsed_and_scored_news['date'] = pd.to_datetime(parsed_and_scored_news.date).dt.date

parsed_and_scored_news.head()

produces the following error:

Error:
LookupError                               Traceback (most recent call last)
<ipython-input-6-0700d0f789c7> in <module>
      1 # Instantiate the sentiment intensity analyzer
----> 2 vader = SentimentIntensityAnalyzer()
      3 
      4 # Set column names
      5 columns = ['ticker', 'date', 'time', 'headline']

~\AppData\Local\Programs\Python\Python37\lib\site-packages\nltk\sentiment\vader.py in __init__(self, lexicon_file)
    337         self, lexicon_file="sentiment/vader_lexicon.zip/vader_lexicon/vader_lexicon.txt",
    338     ):
--> 339         self.lexicon_file = nltk.data.load(lexicon_file)
    340         self.lexicon = self.make_lex_dict()
    341         self.constants = VaderConstants()

~\AppData\Local\Programs\Python\Python37\lib\site-packages\nltk\data.py in load(resource_url, format, cache, verbose, logic_parser, fstruct_reader, encoding)
    750 
    751     # Load the resource.
--> 752     opened_resource = _open(resource_url)
    753 
    754     if format == "raw":

~\AppData\Local\Programs\Python\Python37\lib\site-packages\nltk\data.py in _open(resource_url)
    875 
    876     if protocol is None or protocol.lower() == "nltk":
--> 877         return find(path_, path + [""]).open()
    878     elif protocol.lower() == "file":
    879         # urllib might not use mode='rb', so handle this one ourselves:

~\AppData\Local\Programs\Python\Python37\lib\site-packages\nltk\data.py in find(resource_name, paths)
    583     sep = "*" * 70
    584     resource_not_found = "\n%s\n%s\n%s\n" % (sep, msg, sep)
--> 585     raise LookupError(resource_not_found)
    586 
    587 

LookupError: 
**********************************************************************
  Resource vader_lexicon not found.
  Please use the NLTK Downloader to obtain the resource:

  >>> import nltk
  >>> nltk.download('vader_lexicon')
  
  For more information see: https://www.nltk.org/data.html

  Attempted to load sentiment/vader_lexicon.zip/vader_lexicon/vader_lexicon.txt

  Searched in:
    - 'C:\\Users\\Newport_j/nltk_data'
    - 'C:\\Users\\Newport_j\\AppData\\Local\\Programs\\Python\\Python37\\nltk_data'
    - 'C:\\Users\\Newport_j\\AppData\\Local\\Programs\\Python\\Python37\\share\\nltk_data'
    - 'C:\\Users\\Newport_j\\AppData\\Local\\Programs\\Python\\Python37\\lib\\nltk_data'
    - 'C:\\Users\\Newport_j\\AppData\\Roaming\\nltk_data'
    - 'C:\\nltk_data'
    - 'D:\\nltk_data'
    - 'E:\\nltk_data'
    - ''
**********************************************************************

I am not sure what it means when it says:

Error:
 Resource vader_lexicon not found.
  Please use the NLTK Downloader to obtain the resource:

  >>> import nltk
  >>> nltk.download('vader_lexicon')

However, nltk 3.5 is installed.

So what must I do to get the error corrected?

Any help appreciated. Thanks in advance.

Respectfully,

ErnestTBass

if a code snippet cannot be run, it's of limited value.
please show all imports, initialization, etc., and please make it so code can be run.

You do what error message say.
So from command line you type python or python3,so it start Python 3.7 Interpreter(interactive mode) that you use.
Then you type what it say in error message.
Example:

>>> import nltk
>>> nltk.download('vader_lexicon')
[nltk_data] Downloading package vader_lexicon to
[nltk_data]     C:\Users\Tom\AppData\Roaming\nltk_data...
True

So next rime run script it will now find vader_lexicon.txt.