auto save

01.py

+s=input("请输入：")#题目要求输入数字串77,56,8,129,102,61，这是个字符串类型，不是int
+max=-1#设置一个变量，用来存储最大的数值
+i=0#每一个数字起始的位置
+j=0#每一个元素开始的位置
+while j<len(s):#重复判断变量j是否小于s的长度
+    ch=s[j]#用j去遍历每一个元素，并赋值给变量ch
+    if ch==",":#如果ch是元素逗号
+        tmp=int(s[i:j])#用索引切片取值并转换成整数类型赋值给变量tmp
+        if tmp>max:#如果变量tmp大于max
+            max=tmp#就把新的变量值赋值给max
+        i=j+1#j+1继续判断
+    j=j+1
+tmp=int(s[i:j])
+if tmp>max:
+    max=tmp
+print(max)
+

02.py

+"""
+n=eval(input("请输入数量："))
+if n==1:
+    cost=150
+elif n>=2 and n<=3:
+    cost=int(n*150*0.9)
+elif n>=4 and n<=9:
+    cost=int(n*150*0.8)
+elif n>=10:
+    cost=int(n*150*0.7)
+print("总额为：",cost)
+
+n=eval(input("请输入正整数："))
+print("{0:@>30,}".format(n))
+a=[11,3,8]
+b=eval(input())
+s=0
+for i in range(3):
+    s+=a[i]*b[i]
+print(s)
+s="abck"
+print(eval("s"))
+import random
+random.seed(255)
+for i in range(5):
+    print(random.randint(1,50),end=" ")
+import turtle
+turtle.pensize(2)
+d=72
+for i in range(5):
+    turtle.seth(d)
+    d+=72
+    turtle.fd(200)
+turtle.done()
+names=input(("请输入各个同学行业名称，行业名称之间用空格间隔（回车结束输入）："))
+name_list=names.split(" ")
+d={}
+for item in name_list:
+    d[item]=d.get(item,0)+1
+ls=list(d.items())
+print(d.items())
+print(ls)
+ls.sort(key=lambda x:x[1],reverse=True)
+for k in ls:
+    print("{}:{}\n".format(k[0],k[1]))
+a=3.6e-1
+b=4.2e3
+print(b-a)
+L1=[4,5,6,8].reverse()
+print(L1)
+try:
+    print((3+4j)*(3-4j))
+except:
+    print("haha")
+def fun(x):
+    try:
+        return x*4
+    except:
+        return x
+import jieba
+s = input("请输入一个中文字符串，包含标点符号：")
+m =jieba.lcut(s)
+print(fun("5"))
+print("中文词语数：{}".format(len(m)))
+
+
+def fun(b=2,a=4):
+    global z
+    z+=3*a+5*b
+    return z
+z=10
+print(z,fun(4,2))
+"""
+ls=[]
+for m in "想念":
+    for n in "家人":
+        ls.append(m+n)
+print(ls)  
+

snake.py

 import pygame
-
+from pygame import locals
 # 初始化pygame，为使用pygame做准备
 pygame.init()
-
+background=pygame.image.load("bg.png")
+right=pygame.image.load("right.png")
+food=pygame.image.load("apple.png")
 # 创建一个窗口
-??
\ No newline at end of file
+screen=pygame.display.set_mode((660,480))
+while True:
+    for event in pygame.event.get():
+        if event.type==locals.QUIT:
+            exit()
+    screen.blit(background,(0,0))
+    screen.blit(right,(240,120))
+    screen.blit(food,(360,300))
+    pygame.display.update()
\ No newline at end of file