import re

s = "Now I need a drink, alcoholic of course, after the heavy lectures involving quantum mechanics."

"""
re.sub(pattern, repl, string, count=0, flags=0)
"""
s = re.sub(r'[,.]', '', s)

s_list = s.split()

answer = []

#文字数をカウントし出現順に配列に格納してるとこ
for n in s_list:
    answer.append(len(n))

print(answer)