import sys

_stdout_reconfigure = getattr(sys.stdout, "reconfigure", None)

if callable(_stdout_reconfigure):

_stdout_reconfigure(encoding="utf-8")

_stderr_reconfigure = getattr(sys.stderr, "reconfigure", None)

if callable(_stderr_reconfigure):

_stderr_reconfigure(encoding="utf-8")

def demo_1_list_create_and_print():

a = list(range(1, 6))

b = list("hello")

print(a)

print(*a)

print(b)

print(*b)

print("".join(b))

for x in a:

print(x)

def demo_2_list_ops_and_membership():

items_1 = [1, 2, 3]

items_2 = [4, 5]

items7 = ["Python", "Java", "JavaScript"]

items_1 += items_2

print(items_1)

print(items_1 * 3)

print(29 in items_1)

print("Python" in items7)

def demo_3_list_comparisons():

nums1 = [1, 2, 3, 4]

nums2 = list(range(1, 5))

nums3 = [3, 2, 1]

print(nums1)

print(nums2)

print(nums3)

print(f"nums1 == nums2 {nums1 == nums2}") # True

print(nums1 != nums2) # False

print(nums1 <= nums3) # True

print(nums2 >= nums3) # False

def demo_4_iterate_with_index():

languages = ["Python", "Java", "C++", "Kotlin"]

for index in range(len(languages)):

print(languages[index])

def throwing_shaizi_for_6000times():

import random

counters = [0] * 6

for _ in range(6000):

face = random.randrange(1, 7)

counters[face - 1] += 1

for face in range(1, 7):

print(f'{face}点出现了{counters[face -1]}次')

def main():

menu = {

"1": ("列表创建/打印与遍历", demo_1_list_create_and_print),

"2": ("列表拼接/重复与成员判断", demo_2_list_ops_and_membership),

"3": ("列表比较运算示例", demo_3_list_comparisons),

"4": ("用下标遍历列表", demo_4_iterate_with_index),

"5": (

"将一颗色子掷6000次，统计每种点数出现的次数",

throwing_shaizi_for_6000times,

),

}

while True:

print("\n==== day8 练习菜单 ====")

for key, (title, _) in menu.items():

print(f"{key}. {title}")

print("0. 退出")

choice = input("请选择要运行的编号：").strip()

if choice in {"0", "q", "quit", "exit"}:

return

selected = menu.get(choice)

if not selected:

print("无效选择，请重新输入。")

continue

title, func = selected

print(f"\n--- {choice}. {title} ---")

try:

func()

except Exception as exc:

print(f"运行出错：{exc!r}")

if __name__ == "__main__":

main()