python爬取剑桥词典 可查询单词

爬取剑桥词典并具有查询功能

1. 使用beasoup模块爬取字母a~z的链接
2. 循环遍历，爬取首字母的每个单词的链接，并保存到text文件
3. 窗口可视化GUI设计

1 爬取链接

import requests 
from bs4 import BeautifulSoup

guidURL = 'https://dictionary.cambridge.org/browse/english-chinese-traditional/'
guideURLs = []
extendURLs = []


def start(url, flag):
    headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.0; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0' }

    source_code = requests.get(url , headers=headers).text
    soup = BeautifulSoup(source_code, 'html.parser')
    # print(soup)
    #guide url
    if flag == 1 :
        for each_text in soup.findAll('ul', {'class':'unstyled a--b a--rev'}):
            for href in each_text.findAll('a'):
                # print(href)
                guideURLs.append(href.get('href'))
    else:   #extend url
        for each_text in soup.findAll('div', {'class': 'scroller scroller--style2 scroller--blur scroller--ind-r grad-trans3-pseudo js-scroller'}):
            for li in each_text.findAll('ul', {'class': 'unstyled a--b a--rev'}):
                for href in li.findAll('a'):
                    extendURLs.append(href.get('href'))
    # print(guideURLs)
    
    
if __name__ == '__main__':
    # guide url
    start(guidURL+'a',1)
    # for i in 'abcdefghijklmnopqrstuvwxyz':
    #     start(guidURL+i,1)

    # # extend url
    for g in guideURLs:
        start(g, 2)
# 文件操作部分
    fd = open('guideURLs.txt', 'w') # 该文件保存26个首字母的url
    print(guideURLs, file=fd)
    fd.close()
    fd = open('extendURLs.txt', 'w')# 该文件保存所有单词的url
    print(extendURLs, file=fd)
    fd.close()

2 获取翻译内容并窗口显示

import requests
from bs4 import BeautifulSoup
import pymysql
from tkinter import messagebox
from tkinter import *
import tkinter as tk
from tkinter import filedialog


# 函数功能：得到翻译内容；将翻译结果保存到text文件和数据库中
def Get_translation(url):
    headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0', }  #请求头
    html = requests.get(url=url, headers=headers).content
    soup = BeautifulSoup(html, 'html.parser')

    try:
        word = soup.find('span', attrs={'class': 'headword'}).getText()

    except:
        word = soup.find('h2', attrs={'class': 'headword'}).getText()
    print(word)
    translation_all = soup.find_all('div', attrs={'class': 'def-block pad-indent'})
    detail_list = list()
    for translation in translation_all:
        detail = translation.find('b', attrs={'class': 'def'}).getText()
        detail_list.append(detail)
        detail_list_to_str = ';'.join(detail_list)
    # print(detail_list)

    # 向数据库中插入数据语句
    query = """insert into words_demo(word, detail) values (%s,%s)"""
    values = (word, detail_list_to_str)
    print('value 值为：', values)
    cursor.execute(query, values)
    word_dic[word] = detail_list
    # print(word_dic)

    # 写文件
    with open('tranlation.txt', 'a', encoding='utf-8') as f:
        f.write(str(word_dic))
        f.close()
    return word_dic


# ***************************窗口可视化部分**********************************#
window = tk.Tk()
window.title("查询页面")
window.geometry("500x400")

# 设置背景

photo = tk.PhotoImage(file='image.gif')
theLabel = tk.Label(window, text="剑桥词典", justify=tk.LEFT, image=photo, compound=tk.CENTER,font=("华文行楷", 20), fg="white")  # CENTER 为关键字，设为为背景，fg为颜色
theLabel.pack()


# 构建文本框
tk.Label(window, text='请输入查询的内容：').place(x=50, y=250)
# tk.Label(window, text='查询结果为:').place(x=70, y=150)
# Entry输入文本字符串
varWord = tk.StringVar(window, value='')
get_text = tk.Entry(window, textvariable=varWord)
get_text.place(x=200, y=250)


# 创建菜单
def Open_file():
    filedialog.askopenfilename(title='打开text文件', filetypes=[('TXT', '*.txt')])


def cut(event=None):
    get_text.event_generate("<>")
def copy(event=None):
    get_text.event_generate("<>")
def paste(event=None):
    get_text.event_generate('<>')

file_menu = Menu(window, tearoff=0)
file_menu.add_command(label='单词url文本',)
file_menu.add_command(label='首字母url文本',)
# 创建编辑菜单
editmenu = Menu(window, tearoff=False)

# 创建编辑下拉内容
editmenu.add("command", label="剪切", command=cut)
editmenu.add_command(label="复制", command=copy)
editmenu.add_command(label="粘贴", command=paste)


mebubar = Menu(window)
mebubar.add_command(label="文件", command=Open_file)
mebubar.add_cascade(label="编辑", menu=editmenu)
mebubar.add_command(label="退出", command=window.quit)

# 跟窗口显示菜单栏
window.config(menu=mebubar)


# 确认键函数说明
def confirm():
    Word = varWord.get()
    if Word in word_dic:
        for k, v in word_dic.items():
            if Word == k:
                Word_translation = v
                # print(Word, '翻译成功')
                break
    else:
        Word_translation = '未找到单词'
    # try:
    #     with open('usrs_info.pickle', 'rb') as usr_file:
    Word_translation_window = messagebox.showinfo(title='翻译结果', message=Word_translation)  # 弹窗 return True/False
    print(Word_translation_window)


# 清空键函数说明
def clear():
    varWord.set('')
    print('取消')


# 创建两个按键
button_ok = tk.Button(window, text='确定', command=confirm).place(x=300, y=300)

button_clear = tk.Button(window, text='清空', command=clear).place(x=150, y=300)

# ********************************************结束***************************************

# 将字符串转化为列表
urls = eval(open('extendURLs.txt').read())
# ***************************尝试创建并连接数据库*******************************************
conn = pymysql.connect(host="localhost", user='root', password='123456', database='dictionary', charset='utf8')
cursor = conn.cursor()
try:
    cursor.execute('create table words_demo(word CHAR(100),detail  CHAR(200))')
    print('数据库创建成功！')
except:
    print('数据库已存在！')
# ********************************************结束***************************************


if __name__ == '__main__':
    word_dic = {}

    for i in urls[1:10]:  #从中抽取十个进行测试
        # print(i)
        Get_translation(i)
    print(word_dic)
    cursor.close()
    conn.commit()
    conn.close()
    window.mainloop()

执行结果如下：