Computational Linguistics 1, Exercise 1: code points and bytes

Code (run with py -X utf8):

for ch in ["n", "ñ", "€", "😀"]:
    print(ch, "U+%04X" % ord(ch), len(ch.encode("utf-8")))

Output from the run:

n U+006E 1
ñ U+00F1 2
€ U+20AC 3
😀 U+1F600 4

Pattern: the larger the code point, the more bytes UTF-8 needs. Here "n"
(ASCII range) takes 1 byte, "ñ" 2, "€" 3, and the emoji (a supplementary-plane
code point) 4, matching the Unicode article's statement that supplementary-plane
code points take four bytes in UTF-8. (The article says Basic Multilingual Plane
code points take one to three bytes; the exact thresholds are not in the part
of the article I read, so I only claim the pattern shown by these four.)