import random
my_input = input("请输入两个整数start和end（start>end，且用空格分隔）：")
start, end = [eval(i) for i in my_input.split(" ")]
judge_int = isinstance(start, int) and isinstance(end, int)
judge_gl = start <= end
while not judge_int or not judge_gl:
if not judge_int:
my_input = input("start或end不是整数，请重新输入：")
else:
my_input = input("start大于end，请重新输入：")
start, end = [eval(i) for i in my_input.split(" ")]
judge_int = isinstance(start, int) and isinstance(end, int)
judge_gl = start <= end
print("输出{}和{}之间的一个随机数：{}".format(start, end, random.randint(start, end)))
2. 编写程序，在指定文件路径读方式打开指定文件名，要求如果文件不存在提示异常错误并且创建新的同名文件。
import os
direc = input("请输入要读取文件的路径：")
filename = input("请输入要读取的文件名：")
file = os.path.join(direc, filename)
if os.path.isfile(file):
with open(file, "r", encoding="utf-8") as fread:
print("文件存在，以只读方式打开：", file)
else:
with open(file, "w", encoding="utf-8") as fwrite:
print("文件不存在，新建该文件：", file)
