How to sort the characters of a string in the order "AaBbCc..." in python?

Question

Python

How to sort the characters of a string in the order "AaBbCc..." in python (Each character only occurs once in the source string eg "baBcAC"?

Answer 1

Yes, do not care how many times it occurs:

order = {c: i for i, c in enumerate(
    "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz")}

s = "Lorem ipsum dolor sit amet, consectetur adipiscing elit"

print(''.join(sorted(s, key=lambda c: order.get(c, 99))))

Answer 2

One option has already been suggested to you, but I would do it differently, without hammering the entire alphabet into the code:

key = lambda c: (c.lower(), c.islower())
print(''.join(sorted(s, key=key)))