条件循环函数定义字符串操作练习

Posted 2020-10-06 lcm1995

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用循环画五角星

import turtle
turtle.color (‘red‘)
turtle.fillcolor (‘yellow‘)
turtle.begin_fill ()
for i in range (5):
    turtle.forward (100)
    turtle.right (144)
turtle.end_fill ()

用循环画同心圆

import turtle
from turtle import *
for i in range(10):
    turtle.up ()
    turtle.goto(0,-20*(i+1))
    turtle.down ()
    turtle.circle(20*(i+1))

用while循环画太阳花

import turtle
from turtle import *
while True:
    forward(200)
    right(170)
    if(abs(pos()))<1:
        break

用函数定义画五个五角星

import turtle
turtle.color (‘red‘)
turtle.bgcolor (‘red‘)
turtle.color (‘yellow‘)
turtle.fillcolor (‘yellow‘)
def lcm_draw5(r):
    turtle.begin_fill ()
    for i in range(4):
        turtle.forward (r)
        turtle.right (144)
    turtle.end_fill()
def lcm_location(x,y):
    turtle.up ()
    turtle.goto(x,y)
    turtle.down ()
lcm_location(-250,75)
lcm_draw5(100)


lcm_location(-80,125)
lcm_draw5(50)


lcm_location(-60,100)
lcm_draw5(50)

lcm_location(-80,-20)
lcm_draw5(50)

lcm_location(-70,-60)
lcm_draw5(50)

用函数定义画钻石花瓣的太阳花

import turtle
def lcm_draw4():
    turtle.forward(100)
    turtle.right(45)
    turtle.forward(100)
    turtle.right(135)

for i in range(36):
    lcm_draw4()
    lcm_draw4()
    turtle.left(10)

字符串操作

输入学号，识别年级、专业、序号。

num=input(‘输入您的学号：‘)
print(‘年级：‘+num[:4] ,‘专业：‘+num[4:8], ‘序号：‘+num[8:])

输入1-7的数字，输出对应的“星期几”。

s=(‘一二三四五六日‘)
day=int(input(‘输入数字（1-7):‘))
print(‘星期‘+s[day-1])

识别身份证号中的省市区、年龄、性别。
用字符串操作生成python文档各库的网址(起始网址在这里https://docs.python.org/3.6/library/index.html)
```
a=(‘https://docs.python.org/3.6/library/‘)
b=(‘.html‘)
print(a[:]+‘index‘+b[:])
```

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条件循环函数定义字符串操作练习