case_sensitive=True gives unexpected results

In a case-sensitive dictionary, I would expect 'FBI' to be known and 'fbi' to be unknown. However, both cases give me 'fbi' as known:

from spellchecker import SpellChecker

spell = SpellChecker(case_sensitive=True)

print(spell.known(["FBI"]))
print(spell.known(["fbi"]))

{'fbi'}
{'fbi'}

[nschloe]

Thanks for the info!

[barrust]

To use a case_sensitive dictinoary, you will need to build it yourself as the default dictionaries are case-insensitive. There are lots of ways to build dictionaries, and they are not manually. I only used that to ensure that there wasn’t a bug. You can find the different ways to build a custom dictionary in the documentation on building a new dictionary or in the GitHub Discussion #90.

Either way, there are reasons why the default dictionaries are not capitalized:

• Reduce the number of characters to calculate all the differences
• Reduces the number of words to check (The vs. the) since the same word may be capitalized, say due to being the first word in the sentence.
• The library does not take into account the type of word (entity, verb, adverb, etc) and thus cannot determine if the word being checked should be capitalized or not.

Just some thoughts on it; good luck!