15行Python 仿百度搜索引擎
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15行Python 仿百度搜索引擎
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開發工具：PyCharm
開發環境：python3.6 + flask + requests
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開發流程:
1. 啟動一個web服務
from flask import Flask app = Flask(__name__) if __name__ == '__main__':app.run(host='127.0.0.1', port=6666)2. 增加app.route裝飾器
from flask import Flaskapp = Flask(__name__)@app.route('/') def index():return 'Hello World' if __name__ == '__main__':app.run(host='127.0.0.1', port=5000)3. 增加index.html
<!DOCTYPE html> <html lang="en"> <head><meta charset="UTF-8"><title>仿百度搜索</title><style type="text/css">.align-center{position:fixed;left:30%;top:30%;margin-left:width/2;margin-top:height/2;}</style> </head> <body><form action="/s" method="get"><div class="align-center"><input type="search" name="key"> <input type="submit" value="搜索"><br></div></form> </body> </html> index.html4. 增加 render_template
from flask import Flask from flask import render_template app = Flask(__name__)@app.route('/') def index():return render_template('index.html') if __name__ == '__main__':app.run(host='127.0.0.1', port=5000)5. 增加返回結果
@app.route('/s') def search():return 'Hello World'6. spider.py
import requestsdef getBdMsg(keyword):headers = {"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"}res = requests.get('https://www.baidu.com/s?wd={}'.format(keyword), headers = headers).textreturn res7. 獲取搜索框關鍵字，通過爬蟲程序搜索，獲得百度搜索結果
from flask import Flask from flask import render_template from flask import request from spider import getBdMsg app = Flask(__name__)@app.route('/') def index():return render_template('index.html')@app.route('/s') def search():keyword = request.args.get("key")text = getBdMsg(keyword)return textif __name__ == '__main__':app.run(host='127.0.0.1', port=5000)8. 修改spider.py的返回結果，通過鏈式replace()，替換百度圖標和“百度一下”
return res.replace('//www.baidu.com/img/baidu_jgylogo3.gif','static/images/google.png').replace('百度一下', 'Google')?
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附完整源碼：
# -*- coding: utf-8 -*- # @Time : 2018/3/19 12:46 # @Author : TanRong # @Software: PyCharm # @File : search.pyfrom flask import Flask from flask import render_template from spider import getBdMsg from flask import request# Flask(__name__).run() app = Flask(__name__)#app.route裝飾器 @app.route('/') def index():return render_template('index.html')@app.route('/s') def search():keyword = request.args.get('key')text = getBdMsg(keyword)return textif __name__ == '__main__':app.run() search.py # -*- coding: utf-8 -*- # @Time : 2018/3/21 18:07 # @Author : TanRong # @Software: PyCharm # @File : spider.pyimport requestsdef getBdMsg(keyword):# 必須加上請求頭，這樣才是瀏覽器請求，不然無返回結果# F12 - NetWork - Requeset Headers - UserAgentheaders = {"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"}res = requests.get('https://www.baidu.com/s?wd={}'.format(keyword), headers = headers).textreturn res.replace('//www.baidu.com/img/baidu_jgylogo3.gif','static/images/google.png').replace('百度一下','Google').replace('百度','Google') #鏈式replace()if __name__ == '__main__':getBdMsg('風景') spider.py <!DOCTYPE html> <html lang="en"> <head><meta charset="UTF-8"><title>仿百度搜索</title><style type="text/css">.align-center{position:fixed;left:30%;top:30%;margin-left:width/2;margin-top:height/2;}</style> </head> <body><form action="/s" method="get"><div class="align-center"><input type="search" name="key"> <input type="submit" value="搜索"><br></div></form> </body> </html> index.html?
轉載于:https://www.cnblogs.com/tanrong/p/8641321.html
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