Python学习笔记6函数和代码复用

1、函数

（1）定义：

（2）函数调用

（3）函数的参数传递

参数传递的两种方式：函数调用时，参数可以按照位置或名称的方式传递

（4）函数的返回值

(5)局部变量和全局变量

（6）lambda函数

2、实例：七段数码管的绘制

 1 import turtle
 2 def drawLine(draw):
 3     turtle.pendown() if draw else turtle.penup()
 4     turtle.fd(40)
 5     turtle.right(90)
 6 def drawDigit(digit):
 7     drawLine(True) if digit in [2,3,4,5,6,8,9] else drawLine(False)
 8     drawLine(True) if digit in [0,1,3,4,5,6,7,8,9] else drawLine(False)
 9     drawLine(True) if digit in [0,2,3,5,6,8,9] else drawLine(False)
10     drawLine(True) if digit in [0,2,6,8] else drawLine(False)
11     turtle.left(90)
12     drawLine(True) if digit in [0,4,5,6,8,9] else drawLine(False)
13     drawLine(True) if digit in [0,2,3,5,6,7,8,9] else drawLine(False)
14     drawLine(True) if digit in [0,1,2,3,4,7,8,9] else drawLine(False)
15     turtle.left(180)
16     turtle.penup()
17     turtle.fd(20)
18 def drawDate(date):
19     for i in date :
20         drawDigit(eval(i))
21 def main():
22     turtle.setup(800,350,200,200)
23     turtle.penup()
24     turtle.fd(-300)
25     turtle.pensize(5)
26     drawDate('20181010')
27     turtle.hideturtle()
28     turtle.done()
29 main()

运行结果：

 1 import turtle,time
 2 def drawGap():
 3     turtle.penup()
 4     turtle.fd(5)
 5 def drawLine(draw):
 6     drawGap()
 7     turtle.pendown() if draw else turtle.penup()
 8     turtle.fd(40)
 9     drawGap()
10     turtle.right(90)
11 def drawDigit(digit):
12     drawLine(True) if digit in [2,3,4,5,6,8,9] else drawLine(False)
13     drawLine(True) if digit in [0,1,3,4,5,6,7,8,9] else drawLine(False)
14     drawLine(True) if digit in [0,2,3,5,6,8,9] else drawLine(False)
15     drawLine(True) if digit in [0,2,6,8] else drawLine(False)
16     turtle.left(90)
17     drawLine(True) if digit in [0,4,5,6,8,9] else drawLine(False)
18     drawLine(True) if digit in [0,2,3,5,6,7,8,9] else drawLine(False)
19     drawLine(True) if digit in [0,1,2,3,4,7,8,9] else drawLine(False)
20     turtle.left(180)
21     turtle.penup()
22     turtle.fd(20)
23 def drawDate(date):
24     turtle.pencolor("red")
25     for i in date :
26         if i == '-':
27             turtle.write("年",font=("Arial", 18, "normal"))
28             turtle.pencolor("green")
29             turtle.fd(40)
30         elif i == '=':
31             turtle.write("月",font=("Arial", 18, "normal"))
32         elif i == '+':
33             turtle.write("日",font=("Arial", 18, "normal"))
34         else:
35             drawDigit(eval(i))
36 def main():
37     turtle.setup(800,350,200,200)
38     turtle.penup()
39     turtle.fd(-300)
40     turtle.pensize(5)
41     drawDate(time.strftime("%Y-%m=%d+",time.gmtime()))
42     #drawDate('20181010')
43     turtle.hideturtle()
44     turtle.done()
45 main()

运行结果：（不知道问题出在哪里了）

posted on 2019-04-29 20:10 2019重新起航阅读(322) 评论(0) 编辑收藏举报