# 基数排序有着局限性，只能是整数，
# 排序的时候要先排后面一个条件的（多条件排序）#如本例中，先从个位开始排起
# 多关键字排序
# 从低关键字开始排序
# @File: radix_sort
##############################################
# def get_digit(num, i): # 获取整数第i位数字 #
# return num // (10 ** i) % 10 #
# #
# #
# def int_to_list(num): #
# li = [] #
# while num > 0: #
# li.append(num % 10) #
# num = num // 10 #
# li.reverse() #
# return li #
##############################################
def list_to_buckets(li, i):
buckets = [[] for _ in range(10)]
for num in li:
digit = num // (10 ** i) % 10
buckets[digit].append(num)
return buckets
def buckets_to_list(buckets):
li = []
for bucket in buckets:
for num in bucket:
li.append(num)
return li
# return [num for bucket in buckets for num in bucket]
def radix_sort(li):
max_val = max(li)
i = 0
while 10 ** i <= max_val:
li = buckets_to_list(list_to_buckets(li, i))
i += 1
return li
print(radix_sort([5, 3, 9, 8, 1, 0, 99]))
