python requests库的简单运用

python

requests的简单运用

使用pycharm获取requests包

ctrl+alt+s Project:pythonProject pythoninterpreter 点+号搜索

使用requests里的socket达成局域网内通讯,UDP

import time   #server
import socket
try:
    s = socket.socket(type=socket.SOCK_DGRAM)  # 创建类
    hostname = socket.gethostname()  # 获取自己的主机名
    s.bind((hostname, 8888))  # 绑定主机号与端口号
    msg,address=s.recvfrom(1024)
    print(time.strftime("%Y-%m-%d  %H:%M:%S",time.localtime(time.time())),
"服务端收到客户端:%s的消息：%s"%(address,msg.decode('utf-8')))
    data='可以正常通讯'.encode('utf-8')
    s.sendto(data,address)
    while True:
        a = input("发送消息(q = quit)")
        if a != "q":
            s.sendto(a.encode('utf-8'), address)
        else:
            break
        msg,address=s.recvfrom(1024)
        print(time.strftime("%Y-%m-%d  %H:%M:%S", time.localtime(time.time())),
            "服务端收到客户端:%s的消息：%s" % (address, msg.decode('utf-8')))
    s.close()
except Exception as e:
    print("出错了", e)

import socket    #client
import time
try:
    s=socket.socket(type=socket.SOCK_DGRAM)
    hostname=socket.gethostname()
    data='连接成功'.encode('utf-8')
    s.sendto(data,(hostname,8888))
    responese,address=s.recvfrom(1024)
    print(time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())),
'收到服务端%s的消息:%s'%(address,responese.decode('utf-8')))
    n=0
    while n<1000:
        response,address = s.recvfrom(1024)
        print(time.strftime("%Y-%m-%d  %H:%M:%S", time.localtime(time.time())),
"收到服务端%s的消息：%s" % (address, response.decode('utf-8')))
        a = input('发送信息')
        s.sendto(a.encode('utf-8'),address)
    s.close()
except Exception as e:
    print('出错了',e)

使用requests里的socket达成局域网内通讯,TCP

import socket   #server
import time
try:
    s = socket.socket()
    hostname = socket.gethostname()
    # 绑定套接字地址
    s.bind((hostname, 8888))
    s.listen(5)
    print(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())), '服务端准备完毕，等待客户端连接')
    con, address = s.accept()
    print(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())),'客户端已连接上服务端，连接地址：', address)
    message = '你好，我是服务端'
    # 发送消息，必须对发送的内容进行编码
    con.send(message.encode('utf-8'))
    print(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())), '服务端发送：', message)
    # 关闭套接字
    con.close()
except Exception as e:
    print('建立TCP服务端失败', e)

import socket
import time
try:
    s = socket.socket()
    hostname = socket.gethostname()
    s.connect((hostname, 8888))
    response = s.recv(1024).decode('utf-8')   # 接收服务端消息并解码
    print(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())), '收到服务端消息：', response)
    s.close()    # 关闭套接字
except Exception as e:
    print('建立TCP客户端失败', e)

requests模块里的get应用

import requests
word = input('请输入搜索内容')
pn = input('请输入页码')
p={'kw':word,"pn":pn}
url='https://tieba.baidu.com/f'
headers={'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0'}
re=requests.get(url,headers=headers,params=p)
print(re.content.decode('utf-8'))

输入图片地址将结尾改成.jpg可以爬图片

request模块里的post应用

这里使用post去给百度翻译传参数

import requests
import json
headers={"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0"}  
url='https://fanyi.baidu.com/sug'
while True:
    word = input('百度翻译:')
    if word.lower() == 'quit':
        break
    data={"kw":word}
    re=requests.post(url,headers=headers,data=data)  #地址，伪装的浏览器以及数据
    re_obj=re.json()   #把json格式写进re_obj
    print(word+":"+re_obj['data'][0]['v'])        #指定re_obj里的特定值
    filename=word+'.json'     #设置文件名
    fp=open(filename,"w",encoding='utf-8')      #以utf-8写入文件
    json.dump(re_obj,fp=fp,ensure_ascii=False)     #不允许json以ascii码的形式写入文件

get是在url地址上加参数，post是在页面里面的文本栏加参数