Python小程序练习（7个） 2017年9月28日---告诉自己多东西练习，而不是去空想

str1 = input("请输入一个人的名字：")
str2 = input("请输入一个国家名字：")
print("世界这么大，{}想去看看{}。".format(str1,str2))

n = input("请输入整数N:")
sum = 0
for i in range(int(n)):
    sum +=i+1
print("1到N求和结果：",sum)

for i in range(1,10):
    for j in range(i,i+1):
        print("{}*{}={:2}".format(j,i,i*j),end=‘‘)
    print(‘‘)

sum, tmp = 0,1
for i in range(1,11):
    tmp*=i
    sum+=tmp
print("运算结果是:{}".format(sum))

n=1
for i in range(5,0,-1):
n = (n+1)<<1
print(n)

diet = [‘西红柿‘,‘花椰菜‘,‘黄瓜‘,‘牛排‘,‘虾仁‘]
for x in range(0,5):
for y in range(0,5):
if not(x==y):
print("{}{}".format(diet[x],diet[y]))

from turtle import*
fillcolor("red")
begin_fill()
while True:
    forward(200)
    right(144)
    if abs(pos())<1:
        break
end_fill()

from turtle import*
color(‘red‘,‘yellow‘)
begin_fill()
while True:
    forward(200)
    left(170)
    if abs(pos())<1:
        break
end_fill()
done()

import turtle
import time
turtle.speed("fastest")
turtle.pensize(2)
for x in range(100):
    turtle.forward(2*x)
    turtle.left(90)
time.sleep(3)

import turtle
import time
turtle.pensize(2)
turtle.bgcolor("black")
colors = ["red","yellow","purple","blue"]
turtle.tracer(False)
for x in range(400):
    turtle.forward(2*x)
    turtle.color(color[x%4])
    turtle.left(91)
turtle.tracer(True)