xlsx.UseSharedStrings(on)
xlsx.UseSharedStrings() to
disable this functionality by passing False in the on parameter.
Note that this function will only be effective when adding new strings to a document.
If you're opening a document that uses shared strings and save it again, it will still
keep its shared strings, even if you have disabled shared string mode using this
function. xlsx.UseSharedStrings() will only affect new strings added to the document.
By default the global shared string table is enabled.
True to enable the global shared string table, False to disable it