技術標籤：python爬蟲

裡面有幾個問題，請大神講講

'''
日期：2021年1月10日
百度翻譯 利用第三方庫js解析fromdata裡面的sign值
js裡找到 i ，u 引數
這個指令碼僅供學習交流，小白一枚大神勿噴
缺點：過於簡單
'''

import requests
import jsonpath
import execjs
from fake_useragent import UserAgent


class BaiDu():
    def __init__(self, word):
        # 此處不明白，加self和不加self的區別，不加也能呼叫
        self.
 
word = word

        self.headers = {
            "User-Agent": UserAgent().random,

            'cookie': 'PSTM=1592717775; BIDUPSID=BE1B387567083C74F8D5CED3C828E0B8; BAIDUID=F7CE4B6E6C66296A3614B1CD6F6BF553:FG=1; BDUSS=d6WVVYTHhNfm8zbkJwbks5QTVvSX5EamZmaE1SRGtyRWxtTzRQMW5SR2poZ0ZnRVFBQUFBJCQAAAAAAAAAAAEAAAAqyXQMc2EzMzY2AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAKP52V-j-dlfam; BDUSS_BFESS=d6WVVYTHhNfm8zbkJwbks5QTVvSX5EamZmaE1SRGtyRWxtTzRQMW5SR2poZ0ZnRVFBQUFBJCQAAAAAAAAAAAEAAAAqyXQMc2EzMzY2AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAKP52V-j-dlfam; __yjs_duid=1_73118e33f40aaaa3deddfd28764729e71608950605967; H_PS_PSSID=33423_33419_33261_31254_33284_33287_33350_33460_22160_33370; delPer=0; PSINO=2; BA_HECTOR=aga50l042l20a400jc1fvi7p20q; BDORZ=B490B5EBF6F3CD402E515D22BCDA1598; BAIDUID_BFESS=F7CE4B6E6C66296A3614B1CD6F6BF553:FG=1; Hm_lvt_64ecd82404c51e03dc91cb9e8c025574=1610161957; REALTIME_TRANS_SWITCH=1; FANYI_WORD_SWITCH=1; HISTORY_SWITCH=1; SOUND_SPD_SWITCH=1; SOUND_PREFER_SWITCH=1; yjs_js_security_passport=5315d7c053acd0a3c1511051724e32c095fcd098_1610161956_js; Hm_lpvt_64ecd82404c51e03dc91cb9e8c025574=1610162461; ab_sr=1.0.0_MzAzZDQ3NWI5ZTI3NTUwMWRjMjliZmVkZTNjNTcxZWNlNDdjYmViZWJiNWY1NmZjZTlmZjVmOWJiZTMzNDc5ZTJkYzMwZDM2NzlhNGRhOWE4N2I0OTczZjE3NTVlY2Vm; __yjsv5_shitong=1.0_7_8551d242d1db0166b8486cb44d581e04fbbc_300_1610162460533_60.1.128.76_305b5505'
 

        }
        self.From, self.To = self.get_lang()
        self.fromdata = {
            'from': f'{self.From}',
            'to': f'{self.To}',
            'query': f'{self.word}',
            'simple_means_flag': '3',
            'sign': self.get_sign(),
            'token': '08a031823bb6373a2cbc56171ca5e03a'
 
,
            'domain': ' common'
        }

    def get_sign(self):
        '''
        通過第三方庫獲取js資料，這裡並沒有提供js檔案，可以百度搜索一下。挺多的
        :return:
        '''
        with open('baidu-test.js', 'r') as f:
            jsdata = f.read()
        jsdata = execjs.compile(jsdata).call('e', f'{self.word}')
        return jsdata

    def get_lang(self):
        '''
        自動翻譯語言，目前只支援漢譯英、英譯漢
        :return:
        '''
        lang_url = 'https://fanyi.baidu.com/langdetect'
        lang_data = {
            'query': f'{self.word}'
        }
        lang = requests.post(lang_url, headers=self.headers, data=lang_data)
        # 單詞輸入錯誤會返回 nor。
        From = lang.json()['lan']
        To = 'en'
        if From == 'nor':
            print('輸入錯誤')
        elif From != 'zh':
            To = 'zh'
        return From, To

    def get_html(self):
        '''
        翻譯請求
        :return:
        '''
        #此處不明白，加self和不加self的區別，好像同樣能呼叫

        re = requests.post(f'https://fanyi.baidu.com/v2transapi?from={self.From}&to={self.To}', headers=self.headers, data=self.fromdata)

        return re.json()


if __name__ == '__main__':
    word = input('請輸入你的單詞：')
    baidu = BaiDu(word)
    fanyi = jsonpath.jsonpath(baidu.get_html(), "$..dst")
    print(fanyi)