python练习题

#判断2-10000之间有多少素数 并输出所有素数
count=0
for num in range(2,100001):
    for x in range(2,num):
        if num %x==0:
            break

    else:
        count += 1
        print(num,'是素数')
print('素数的个数：',count)

画出九宫格
import turtle

c = turtle.Turtle()

ponit_list=[(-300,0),(-200,0),(-100,0),
            (-300,-100),(-200,-100),(-100,-100),
            (-300,-200),(-200,-200),(-100,-200)]
c.speed(10)
def move(x,y):
    c.penup()
    c.goto(x,y)
    c.pendown()
# 画一个正方形
def square():
    for i in range(4):
        c.forward(100)
        c.right(90)

for i in range(9):
    move(*ponit_list[i])
    square()