Python基础入门（小测试）

题目1:1,2,3,4的数字，能互相组成多少位无重复的两位数？
In [3]:

l1 = []
for i in range(1,5):
    for j in range(1,5):
        if i != j:
                l1.append("%d%d"%(i,j))
l1
Out[3]:
['12', '13', '14', '21', '23', '24', '31', '32', '34', '41', '42', '43']
题目2：输入三个数想xyz,请把这三个数由小到大
In [13]:

l1 = []
for i in range(3):
    n = input("please input three num:")
    if n.isdigit():
        l1.append(n)
    else:
        n = input("please input three num:")
print(sorted(l1))
please input three num:1
please input three num:3
please input three num:2
['1', '2', '3']

英，空格，数字和其余字符的个数
题目3：输入一行字符，分别统计出其中英，空格，数字和其余字符的个数
In [15]:

space = 0
other = 0
digit = 0
alpha = 0
str = input("please input a string:")
for i in range(len(str)):
    if str[i].isdigit():
        digit += 1
    elif str[i].isspace():
        space += 1
    elif str[i].isalpha():
        alpha += 1
    else:
        other += 1
print(digit,space,alpha,other)
please input a string:sadashd123  das,,
3 2 10 2

题目4：猴子吃桃问题
猴子第一天摘下若干个桃子，吃了一半后再吃一个
第二天早上又吃了一半再吃一个
每天都这样。。。。。。
到了第十天早上发现只剩下一个桃子
求一共有多少个桃子
In [1]:

sum = 1
for i in range(9,0,-1):
    sum = (sum+1)*2
print(sum)
1534
题目5：猜数字 随机生成一个数子 输入一个数字进行猜 判断是大还是小 判断时间
In [2]:

import random
import time
num = random.randint(0,100)
starttime = time.time()
​
guess = int(input("please input a num:"))
n = 1
while guess != num:
    n+=1
    if guess > num:
        print("big")
        guess = int(input("please input a num:"))
    elif guess < num:
        print("small")
        guess = int(input("please input a num:"))
else:
    print("you are right")
please input a num:50
big
please input a num:25
big
please input a num:12
small
please input a num:18
small
please input a num:20
small
please input a num:23
big
please input a num:22
big
please input a num:21
you are right