extract every alternate letters from a string in python , 2*(orginial_index)+2 times,also looking for functions to check alphabet and float in list

alternate letters in uppercase in python
python capitalize every other letter
alternate letters in uppercase in c
convert the alternate characters of the string to uppercase in python
returns a matching string where every even letter is uppercase and every odd letter is lowercase
how to print alternate characters of a string in python
alternate letters in uppercase in java
how to capitalize every other word in python