条件、循环、函数定义、字符串操作练习
1：用循环画五角星
1 import turtle
2
3 turtle.fillcolor("red")
4 turtle.begin_fill()
5 for i in range(5):
6 turtle.forward(100)
7 turtle.right(144)
8 turtle.end_fill()
2：用循环画同心圆
1 import turtle 2 for i in range(3): 3 turtle.up() 4 turtle.goto(0,-50*(i+1)) 5 turtle.down() 6 turtle.circle(50*(i+1))
3：用while循环画太阳花
1 import turtle
2 turtle.color('red','yellow')
3 turtle.begin_fill()
4 while True:
5 turtle.forward(200)
6 turtle.left(170)
7 if abs(turtle.pos()) < 1:
8 break
9 turtle.end_fill()
4：用函数定义画五个五角星
1 import turtle
2 turtle.setup(600,400,0,0)
3 turtle.color("yellow")
4 turtle.bgcolor('red')
5 turtle.fillcolor("yellow")
6
7 def Mygoto(x,y):
8 turtle.up()
9 turtle.goto(x,y)
10 turtle.down()
11
12 def Mydraw(r):
13 turtle.begin_fill()
14 for i in range(5):
15 turtle.forward(r)
16 turtle.right(144)
17 turtle.end_fill()
18
19 Mygoto(-273,110)
20 Mydraw(100)
21
22 Mygoto(-121,162)
23 turtle.left(45)
24 Mydraw(50)
25
26 Mygoto(-79,110)
27 Mydraw(50)
28
29 Mygoto(-79,51)
30 turtle.right(45)
31 Mydraw(50)
32
33 Mygoto(-121,22)
34 turtle.right(45)
35 Mydraw(50)
5：用函数定义画钻石花瓣的太阳花
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1 import turtle 2 def Yyxdraw_diamond(brad): 3 brad.forward(120) 4 brad.right(45) 5 brad.forward(120) 6 brad.right(135) 7 def Yyxdraw_art(): 8 window=turtle.Screen() 9 window.bgcolor("red")10 brad=turtle.Turtle()11 brad.shape("turtle")12 brad.color("yellow")13 for i in range(36):14 Yyxdraw_diamond(brad)15 Yyxdraw_diamond(brad)16 brad.left(10)17 window.exitonclick()18 19 Yyxdraw_art() |
字符串操作
1：输入学号，识别年级、专业、序号。
1 majors = {
2 11:'网络工程',
3 12:'软件工程',
4 13:'数字媒体',
5 }
6
7 def recognition(studentID):
8 if len(studentID)<12:
9 print("请输入正确的学号！")
10 elif studentID.isdigit() != True:
11 print("请输入正确的学号！")
12 else:
13 grade = studentID[0:4]
14 major = studentID[6:8]
15 num = studentID[10:12]
16 print("年级：{}级".format(grade))
17 print("专业为：",majors.get(int(major)))
18 print("序号:{}".format(num))
19
20 studentID = input("请输入学号：")
21 recognition(studentID)
2：输入1-7的数字，输出对应的“星期几”。
1 s="星期一星期二星期三星期四星期五星期六星期天"
2 i=int(input("请输入(1-7)："))
3 if(0<i<8):
4 print(s[-3+3*i:0+3*i])
5 else:
6 print("输入有误!")
3：识别身份证号中的省市区、年龄、性别。
1 ID=input('请输入十八位身份证号码: ')
2 if len(ID)!=18:
3 print("错误的身份证号码!!")
4
5 ID_add=ID[0:6]
6 ID_birth=ID[6:10]
7 ID_sex=ID[14:17]
8
9 if int(ID_add)==440101:
10 print("省市区:广东省广州市市辖区")
11 elif int(ID_add)==440102:
12 print("省市区:广东省广州市东山区")
13 elif int(ID_add)==440103:
14 print("省市区:广东省广州市荔湾区")
15 elif int(ID_add)==440104:
16 print("省市区:广东省广州市越秀区")
17 elif int(ID_add)==440105:
18 print("省市区:广东省广州市海珠区")
19
20
21 birth=2017-int(ID_birth[0:4])
22 print("年龄：{}".format(birth))
23
24 if int(ID_sex)%2==0:
25 print('性别：女')
26 else:
27 print('性别：男')
4：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)
1 yyx1 = "https://docs.python.org/3.6/library/"
2 yyx2 = ".html"
3 yyx3 = input("请输入库名：")
4 print("网址为：%s%s%s"%(yyx1,yyx3,yyx2))
5：练习字符串的+,*,in,len(),eval()
1 print("No!"*3)
2 s="this is "
3 t="younger!"
4 print(s+t)
5 p="hello world!!!"
6 for i in range(len(s)):
7 print(i,s[i])
