excel_name[:16] how to change strip method to according to a character

To strip a string according to a specific character, you can use the `split()` method to split the string into a list of substrings based on that character, and then select the desired substring using indexing. For example, to extract the substring before the first occurrence of the underscore character (`_`), you can do:

excel_name.split('_')[0]

This will split the `excel_name` string into a list of substrings based on the underscore character, and then select the first substring (index 0) as the result.