2024年3月9日发(作者：)

from random import randint

def convert(number):

stop = 0

if number > 50:

stop = 90

elif 30 < number < 50:

stop = 50

elif 0 < number < 30:

stop = 30

return round(number - randint(10, stop) / 100.0, 2)

lst = [20, 40, 60]

print [convert(_) for _ in lst]