Add pythainlp.lm.calculate_ngram_counts

[wannaphong]

Calculates the counts of n-grams in the list words for the specified range.

>>> from pythainlp.lm import calculate_ngram_counts
>>> a=["1","2","3","4"]
>>> calculate_ngram_counts(a)
{('1', '2'): 1, ('2', '3'): 1, ('3', '4'): 1, ('1', '2', '3'): 1, ('2', '3', '4'): 1, ('1', '2', '3', '4'): 1}
>>> 

[pep8speaks]

Hello @wannaphong! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2025-01-02 13:57:39 UTC

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[coveralls]

coverage: 52.728% (-0.06%) from 52.79%
when pulling ca9446d on add-calculate_ngram_counts
into 2252dee on dev.