二维码

import qrcode
from PIL import Image
import os, sys

def gen_qrcode(string, path, logo=""):
    """
    生成中间带logo的二维码
    需要安装qrcode, PIL库
    @参数 string: 二维码字符串
    @参数 path: 生成的二维码保存路径
    @参数 logo: logo文件路径
    @return: None
    """
    qr = qrcode.QRCode(
        version=2,
        error_correction=qrcode.constants.ERROR_CORRECT_H,
        box_size=8,
        border=1
    )
    qr.add_data(string)
    qr.make(fit=True)
    img = qr.make_image()
    img = img.convert("RGBA")
    if logo and os.path.exists(logo):
        try:
            icon = Image.open(logo)
            img_w, img_h = img.size
        except Exception as e:
            print(e) 
            sys.exit(1)
        factor = 4
        size_w = int(img_w / factor)
        size_h = int(img_h / factor)

        icon_w, icon_h = icon.size
        if icon_w > size_w:
            icon_w = size_w
        if icon_h > size_h:
            icon_h = size_h
        icon = icon.resize((icon_w, icon_h), Image.ANTIALIAS)

        w = int((img_w - icon_w) / 2)
        h = int((img_h - icon_h) / 2)
        icon = icon.convert("RGBA")
        img.paste(icon, (w, h), icon)
    img.save(path)
    # 调用系统命令打开图片
    # xdg - open(opens a file or URL in the user's preferred application)
    os.system('xdg-open %s' % path)


if __name__ == "__main__":
    info = "http://www.fjut.edu.cn"
    pic_path = "qr.png"
    logo_path = "logo.png"
    gen_qrcode(info, pic_path,logo_path )

验证码

import random, string, sys, math
from PIL import Image,ImageDraw, ImageFont,ImageFilter
font_path='C:\\Windows\\Fonts\\arial.ttf'
number=4
size=(80,90)
bgcolor=(255,255,255)
fontcolor=(0,0,255)
linecolor=(255,0,0)
draw_line=True
line_number=(1,5)
def gene_text():
    source=list(string.ascii_letters)
    for index in range(0,10):
        source.append(str(index))
    return "".join(random.sample(source,4))
def gene_line(draw,width,height):
    begin=(random.randint(0,width),random.randint(0,height))
    end=(random.randint(0,width),random.randint(0,height))
    draw.line([begin,end],fill=linecolor)
def gene_code():
    width,height=size
    image=Image.new('RGBA',(width,height),bgcolor)
    font=ImageFont.truetype(font_path,25)
    draw=ImageDraw.Draw(image)
    text=gene_text()
    font_width, font_height=font.getsize(text)
    draw.text(((width-font_width)/number, (height-font_height)/number),text,font=font,fill=fontcolor)
    if draw_line:
        gene_line(draw,width,height)
    image=image.transform((width+20,height+10), Image.AFFINE,(1,-0.3,0,-0.1,1,0),Image.BILINEAR)
    image=image.filter(ImageFilter.EDGE_ENHANCE_MORE)
    image.save('1.png')
if __name__=="__main__":
    gene_code()

聊天

#服务器
import socket
import threading
import time


def onLink(sock, addr, user):
    user = 'user' + str(user)
    print('来自' + str(addr) + ' as ' + user)
    sock.send(b'welcome')

    while True:
        data = sock.recv(1024).decode('utf-8')
        time.sleep(1)
        if not data or data == 'exit':
            break

        print(user + ' : ' + data)
        rtn = input('回复' + user + ' : ')
        sock.send(rtn.encode('utf-8'))

    sock.close()
    print('close %s:%s' % addr)
    print(user + ' 已断开')


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('127.0.0.1', 8888))
s.listen(5)

print('等待客户端连接.....')
user = 0
while True:
    sock, addr = s.accept()
    user += 1
    t = threading.Thread(target=onLink, args=(sock, addr, user))
t.start()


#客户端
import socket


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 8888))

data = s.recv(1024).decode('utf-8')
print('服务器:' + data)
while True:
    data = input('请输入:')
    if not data or data == 'exit':
        break

    s.send(data.encode('utf-8'))
    print('服务器:' + s.recv(1024).decode('utf-8'))

print('与服务器断开连接')
s.close()