Udacity课程编程基础：Python

自动打开打开网页

import webbrowser
webbrowser.open("http://v.youku.com/...")

重命名文件夹下的所有文件

import os
def rename_file():
    # get files' names from a diretory
    file_list = os.listdir(r"C:\Users\Administrator\Desktop\prank")
    save_path = os.getcwd()    # Return a string representing the current working directory
    # print("Current Working Directory is "+save_path)
    # Change the current working directory to path
    os.chdir(r"C:\Users\Administrator\Desktop\prank")    
    # rename each file
    for file_name in file_list:
        map = file_name.maketrans('a','a','0123456789')
        os.rename(file_name, file_name.translate(map))

rename_file()

或者可以使用re.sub来替换，本例中替换数字可以为：re.sub(r'[0-9]+', '', file_name)
注：当文件已存在时，无法创建该文件

画图

Paste_Image.png

import turtle

window = turtle.Screen()
window.bgcolor("white")

abc = turtle.Turtle()
abc.shape("arrow")
abc.color("light blue",'light green')
abc.speed(6)
abc.pen(pensize=5)
abc.penup()
abc.setposition(-150, -150)
abc.pendown()
for k in range(3):
    abc.forward(480)
    abc.left(120)
    for i in range(3):
        abc.forward(240)
        abc.left(120)
        abc.color("light blue", 'light green')
        abc.begin_fill()
        for j in range(3):
            abc.forward(120)
            abc.left(120)
        abc.end_fill()
window.exitonclick()

Paste_Image.png

import turtle

def draw_square(some_turtle):
    for m in range(36):
        for n in range(4):
            some_turtle.forward(100)
            some_turtle.right(90)
        some_turtle.right(10)

def draw_circle(some_turtle):
    for l in range(3):
        for m in range(7):
            some_turtle.circle(m * 15)
        some_turtle.left(120)

def draw_triangle(some_turtle):
    for m in range(6):
        some_turtle.left(60)
        for n in range(3):
            some_turtle.right(120)
            some_turtle.forward(240)

def draw_art():
    window = turtle.Screen()
    window.bgcolor("green")

    brad = turtle.Turtle()
    brad.shape('turtle')
    brad.color('black')
    brad.speed(10)
    draw_square(brad)

    angie = turtle.Turtle()
    angie.shape('arrow')
    angie.color('blue')
    angie.speed(10)
    draw_circle(angie)

    lulu = turtle.Turtle()
    lulu.shape('arrow')
    lulu.color('orange')
    lulu.speed(8)
    draw_triangle(lulu)

    window.exitonclick()

draw_art()