for making uppercase from lowercase to upper just use
"string".upper()
where "string"
is your string that you want to convert uppercase
for this question concern it will like this:
s.upper()
for making lowercase from uppercase string just use
"string".lower()
where "string"
is your string that you want to convert lowercase
for this question concern it will like this:
s.lower()
If you want to make your whole string variable use
s="sadf"
# sadf
s=s.upper()
# SADF