Python语言程序设计基础（2）—— Python程序实例解析

温度转换

def tempConvert(ValueStr):
    if ValueStr[-1] in ['F','f']:
        ans = (eval(ValueStr[0:-1]) - 32)/1.8
        print("{:.2f}C".format(ans))
    elif ValueStr[-1]=='C' or ValueStr[-1]=='c':
        ans = 1.8*eval(ValueStr[0:-1]) + 32
        print("{:.2f}F".format(ans))
    else:
        print("格式错误")

str = input()
tempConvert(str)

画蟒蛇

import turtle

def drawSnake(radius,angle,length):
    turtle.seth(-angle/2)
    for i in range(length):
        turtle.circle(radius,angle)
        turtle.circle(-radius,angle)
    turtle.circle(radius,angle/2)
    turtle.fd(40)
    turtle.circle(16,180)
    turtle.fd(40*2/3)
turtle.setup(0.5,0.5)
turtle.penup()
turtle.fd(-250)
turtle.pendown()
turtle.pensize(25)
turtle.pencolor("purple")
drawSnake(40,120,4)
turtle.done()

习题部分

温度转换，输出整数

def tempConvert(ValueStr):
    print(ValueStr)
    if ValueStr[-1] in ['F','f']:
        ans = (eval(ValueStr[0:-1]) - 32)/1.8
        print("{:.0f}C".format(ans))
    elif ValueStr[-1]=='C' or ValueStr[-1]=='c':
        ans = 1.8*eval(ValueStr[0:-1]) + 32
        print("{:.0f}F".format(ans))
    else:
        print("格式错误")

tempConvert(eval(input()))

美元转换

def calc(x):
    if x[-1]=='$':
        return eval(x[0:-1])*6
    elif x[-1]=='￥':
        return eval(x[0:-1])/6
    else :
        return -1
money = input()
print(calc(money),end='')
if money[-1]=='$':
    print('￥')
elif money[-1]=='￥':
    print('$')
else :
    print("errer")

彩色蛇

import turtle

def drawSnake(radius,angle,length):
    turtle.seth(-angle/2)
    color = ["grey","gold","violet","purple","black"]
    for i in range(length):
        turtle.pencolor(color[i])
        turtle.circle(radius,angle)
        turtle.circle(-radius,angle)
    turtle.pencolor(color[-1])
    turtle.circle(radius,angle/2)
    turtle.fd(40)
    turtle.circle(16,180)
    turtle.fd(40*2/3)

turtle.setup(0.5,0.5)
turtle.penup()
turtle.fd(-250)
turtle.pendown()
turtle.pensize(25)
#turtle.pencolor("purple")
drawSnake(40,120,4)
turtle.done()

三角形

import turtle
import math
def paintS():
    turtle.setup(0.5,0.5)
    for i in range(3):
        turtle.seth(120*i)
        turtle.forward(50)
    turtle.done()

四边形

def paintX():
    turtle.setup(0.5,0.5)
    turtle.pensize(5)
    turtle.pencolor("gold")
    for i in range(4):
        turtle.seth(i*90)
        turtle.penup()
        turtle.forward(20)
        turtle.pendown()
        turtle.forward(60)
        turtle.penup()
        turtle.forward(20)

    turtle.done()
paintX()

六角形

import turtle
import math

def paint():
    turtle.pensize(5)
    x = -30
    turtle.seth(x)

    for i in range(1,4):
        turtle.forward(150)
        turtle.seth(x+120)
        x+=120

    turtle.penup()
    turtle.seth(-60)
    turtle.forward(50*math.sqrt(3))
    turtle.pendown()

    x = 30
    turtle.seth(x)
    for i in range(1,4):
        turtle.forward(150)
        turtle.seth(x+120)
        x+=120

    turtle.done()
paint()

正方形螺旋线

import turtle
import math

def painZ():
    turtle.pensize(2)

    cnt = 0
    x = 10
    for i in range(1,60):
        turtle.seth(90*i)
        if cnt >=2 :
            x+=10
            cnt = 0
        turtle.forward(x)
        cnt+=1
    turtle.done()

painZ()