python 学习

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#画个二叉树
import turtle
def draw_brach(brach_length):
    if brach_length>5:
        if brach_length<40:
            turtle.color('green')
        else:
            turtle.color('red')
        turtle.forward(brach_length)
        print('向前',brach_length)
        turtle.right(25)
        print('右转25')
        draw_brach(brach_length-15)
        turtle.left(50)
        print('左转50')
        draw_brach(brach_length-15)
        if brach_length<40:
            turtle.color('green')
        else:
            turtle.color('red')
        turtle.right(25)
        print('右转25')
        turtle.backward(brach_length)
        print('返回',brach_length)
def main():
    turtle.left(90)
    turtle.penup()
    turtle.backward(150)
    turtle.pendown()
    turtle.color('red')
    draw_brach(110)
    turtle.exitonclick()
if __name__=='__main__':
    main()
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#总结
"""
import turtle
turtle.forward()
turtle.backward()
turtle.right()
turtle.left()
turtle.pendown()
turtle.goto()
turtle.penup()
turtle.circle()
setx()          #移x
sety()          #移y
setheading(angle)             #朝向
home()
dol(r)                   #圆点
turtle.fillcolor()
turtle.color(pencolor,fillcolr)
turtle.filling()
turtle.begin_fill()
turtle.end_fill()
turtle.hideturtle()
turtle.showturtle()
turtle.mainloop()或turtle.done()
turtle.mode()           #模式
turtle.delay()          #延时
turtle.begin_poly()     #顶点
turtle.end_poly()
"""
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#随机random模块
'''
random()        #0~1
uniform(1,3)    #随机浮点数
randint(1,3)    #随机整数数
randrang(1,4,2) #
choice([1,2,3]) #从序列中随机读取
choices(seq,3)  #从序列中随机读取3个
shuffle(X)      #打乱
sample(seq,3)   #随机取3个
'''
#发红包
import random
morey=100
remains=0
i=0
while morey>=0:
    i=i+1
    a=random.randint(1,15)
    morey=morey-a
    if morey>=0:
        print('第'+str(i)+'个人收到'+str(a)+'元，'+'剩余'+str(morey)+'元')
        remains=morey
    else:
        break
if remains>0:
    print('第'+str(i)+'个人收到'+str(remains)+'元，'+'剩余0元')


#随机验证码
#import string
#ascii_lowercase    小写
#ascii_uppercase    大写
#ascii_letter       所有大小写字母
#digits             0~9
import random
import string
s=string.digits + string.ascii_letters
v=random.sample(s,4)
print(v)
print(' '.join(v))


#随机图
import turtle as tt
from random import randint
tt.TurtleScreen.__RUNNING=True
tt.speed(0)
tt.bgcolor('black')
tt.setpos(-25,25)           #改变初始位置
tt.colormode(255)
cnt=0
while cnt<2000:
    r=randint(0,255)
    g=randint(0,255)
    b=randint(0,225)
    tt.pencolor(r,g,b)
    tt.forward(50+cnt)
    tt.right(91)
    cnt +=1
tt.done()
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#日期模块datetime
#datetime模块中的类
#date
#time
#datetime
#imedelta           表时间间隔
#datetime_CAPI      C语言接口
#tzinfo             与时区有关的信息
#datetime模块中的常量
#MAXYEAR            最大年份9999
#MINYEAR            最小年份1
import datetime
day=datetime.datetime.now()
day2=datetime.date.today()
print("当前日期：",day)
print("年 月 日",day2)
#datetime.datetime.now()
#datetime.utcnow()          #UCT表示
#datetime.now()


#绘制数码管显示日期
import turtle as t
import datetime
def drawGap():                  #一个管
    t.penup()
    t.fd(5)
def drawLine(draw):             #画吗？
    drawGap()
    t.pendown()if draw else t.penup()
    t.fd(40)
    drawGap()
    t.right(90)
def drawDigit(d):
    drawLine(True) if d in [2,3,4,5,6,8,9] else drawLine(False)
    drawLine(True) if d in [0,1,3,4,5,6,7,8,9] else drawLine(False)
    drawLine(True) if d in [0,2,3,5,6,8,9] else drawLine(False)
    drawLine(True) if d in [0,2,6,8] else drawLine(False)
    t.left(90)
    drawLine(True) if d in [0,4,5,6,8,9] else drawLine(False)
    drawLine(True) if d in [0,2,3,5,6,7,8,9] else drawLine(False)
    drawLine(True) if d in [0,1,2,3,4,7,8,9] else drawLine(False)
    t.left(180)
    t.penup()
    t.fd(20)
def drawDate(date):
    t.pencolor('red')
    for i in date:
        if i=='-':
            t.write("年",font=("Arial",18,"normal"))
            t.pencolor('green')
            t.fd(40)
        elif i=='=':
            t.write("月",font=("Arial",18,"normal"))
            t.pencolor('blue')
            t.fd(40)
        elif i=='+':
            t.write("日",font=("Arial",18,"normal"))
        else:
            drawDigit(eval(i))
def main():
    t.setup(800,350,200,200)
    t.penup()
    t.fd(-350)
    t.pensize(5)
    drawDate(datetime.datetime.now().strftime('%Y-%m=%d+'))
    t.hideturtle()
    t.exitonclick()         #点一下退出
main()