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）
