Checklist
Summary
Add the ability to filter st.multiselect menu with a function applied, so that the options are passed through the function before checking matches with the entered string -- similar to case-insensitivity (which is automatically applied), but where the issue isn't to do with case. This would be similar to Python's sorting key.
Why?
I have multiselects where the display strings and values have letters with macrons (e.g., ē), and they need to retain these. However, they should still be found if the user types the same letter without a macron (e.g., just e). Currently, this does not happen, but if I could apply a function to strip the macrons before matching, then it would work. (The same ability to apply a function would be useful for multiselects where the display string is in a non-Latin alphabet but the user might be typing transliterated characters, or where one wants to use regex to enable true fuzzy matching, so this is not a limited use case.)
How?
Add a parameter filter_func to st.multiselect that would specify the function (possibly also add a "function" option to filter_mode, but I think it wouldn't even need to change, since the fuzzy/prefix/contains could still apply). This would work just like the key parameter in .sorted() and the Pandas .sort_values() methods.
Additional Context
An example -- if I were to type 'i' as the next letter, I wouldn't get fīō as a match:
Checklist
Summary
Add the ability to filter
st.multiselectmenu with a function applied, so that the options are passed through the function before checking matches with the entered string -- similar to case-insensitivity (which is automatically applied), but where the issue isn't to do with case. This would be similar to Python's sortingkey.Why?
I have multiselects where the display strings and values have letters with macrons (e.g., ē), and they need to retain these. However, they should still be found if the user types the same letter without a macron (e.g., just e). Currently, this does not happen, but if I could apply a function to strip the macrons before matching, then it would work. (The same ability to apply a function would be useful for multiselects where the display string is in a non-Latin alphabet but the user might be typing transliterated characters, or where one wants to use regex to enable true fuzzy matching, so this is not a limited use case.)
How?
Add a parameter
filter_functost.multiselectthat would specify the function (possibly also add a"function"option tofilter_mode, but I think it wouldn't even need to change, since the fuzzy/prefix/contains could still apply). This would work just like the key parameter in.sorted()and the Pandas.sort_values()methods.Additional Context
An example -- if I were to type 'i' as the next letter, I wouldn't get fīō as a match: