请问为什么 find 函数无法找到正确的匹配

请问为什么这里找不到正确的匹配
代码:

import requests, bs4
print('\n欢迎使用python翻译器,python翻译器支持任何您能想象到的语言,都能翻译成中文,甚者连古文也可以,分隔单词请用%20')
a=input('\n请输入翻译内容:') 
b='https://translate.google.cn/#view=home&op=translate&sl=auto&tl=zh-CN&text={}'.format(a)
res = requests.get(b)
novel = res.text
bs = bs4.BeautifulSoup(res.text, 'html.parser')
w = bs.find(class_="tlid-translation translation").text
print(w)

谢谢大家的帮忙!
思路:
我认为是find函数错了,我不知道这里应该放什么参数才能找到链接在下方
google翻译

最佳答案
import requests
import re
import json
import time


class GoogleTranslator():
    _host = 'translate.google.cn'

    _headers = {
        'Host': _host,
        'User-Agent':
        'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Mobile Safari/537.36',
        'Accept':
        'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
        'Accept-Language': 'zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',
        'Accept-Encoding': 'gzip, deflate, br',
        'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8',
        'Referer': 'https://' + _host,
        'Connection': 'keep-alive',
        'Cache-Control': 'max-age=0'
    }

    _language = {
        'afrikaans': 'af',
        'arabic': 'ar',
        'belarusian': 'be',
        'bulgarian': 'bg',
        'catalan': 'ca',
        'czech': 'cs',
        'welsh': 'cy',
        'danish': 'da',
        'german': 'de',
        'greek': 'el',
        'english': 'en',
        'esperanto': 'eo',
        'spanish': 'es',
        'estonian': 'et',
        'persian': 'fa',
        'finnish': 'fi',
        'french': 'fr',
        'irish': 'ga',
        'galician': 'gl',
        'hindi': 'hi',
        'croatian': 'hr',
        'hungarian': 'hu',
        'indonesian': 'id',
        'icelandic': 'is',
        'italian': 'it',
        'hebrew': 'iw',
        'japanese': 'ja',
        'korean': 'ko',
        'latin': 'la',
        'lithuanian': 'lt',
        'latvian': 'lv',
        'macedonian': 'mk',
        'malay': 'ms',
        'maltese': 'mt',
        'dutch': 'nl',
        'norwegian': 'no',
        'polish': 'pl',
        'portuguese': 'pt',
        'romanian': 'ro',
        'russian': 'ru',
        'slovak': 'sk',
        'slovenian': 'sl',
        'albanian': 'sq',
        'serbian': 'sr',
        'swedish': 'sv',
        'swahili': 'sw',
        'thai': 'th',
        'filipino': 'tl',
        'turkish': 'tr',
        'ukrainian': 'uk',
        'vietnamese': 'vi',
        'yiddish': 'yi',
        'chinese_simplified': 'zh-CN',
        'chinese_traditional': 'zh-TW',
        'auto': 'auto'
    }
    _url = 'https://' + _host + '/translate_a/single'
    _params = {
        'client': 'webapp',
        'sl': 'en',
        'tl': 'zh-CN',
        'hl': 'zh-CN',
        'dt': 'at',
        'dt': 'bd',
        'dt': 'ex',
        'dt': 'ld',
        'dt': 'md',
        'dt': 'qca',
        'dt': 'rw',
        'dt': 'rm',
        'dt': 'ss',
        'dt': 't',
        'otf': '1',
        'ssel': '0',
        'tsel': '0',
        'kc': '1'
    }

    __cookies = None

    __googleTokenKey = '376032.257956'
    __googleTokenKeyUpdataTime = 600.0
    __googleTokenKeyRetireTime = time.time() + 600.0

    def __init__(self, src='en', dest='zh-CN', tkkUpdataTime=600.0):
        if src not in self._language and src not in self._language.values():
            src = 'auto'
        if dest not in self._language and dest not in self._language.values():
            dest = 'auto'
        self._params['sl'] = src
        self._params['tl'] = dest
        self.googleTokenKeyUpdataTime = tkkUpdataTime
        self.__updateGoogleTokenKey()

    def __updateGoogleTokenKey(self):
        self.__googleTokenKey = self.__getGoogleTokenKey()
        self.__googleTokenKeyRetireTime = time.time(
        ) + self.__googleTokenKeyUpdataTime

    def __getGoogleTokenKey(self):
        """Get the Google TKK from https://translate.google.cn"""
        # TKK example: '435075.3634891900'
        result = ''
        try:
            res = requests.get('https://' + self._host, timeout=3)
            res.raise_for_status()
            self.__cookies = res.cookies
            result = re.search(r'tkk\:\'(\d+\.\d+)?\'', res.text).group(1)
        except requests.exceptions.ReadTimeout as ex:
            print('ERROR: ' + str(ex))
            time.sleep(1)
        return result

    def __getGoogleToken(self, a, TKK):
        """Calculate Google tk from TKK """

        # https://www.cnblogs.com/chicsky/p/7443830.html
        # if text = 'Tablet Developer' and TKK = '435102.3120524463', then tk = '315066.159012'

        def RL(a, b):
            for d in range(0, len(b) - 2, 3):
                c = b[d + 2]
                c = ord(c[0]) - 87 if 'a' <= c else int(c)
                c = a >> c if '+' == b[d + 1] else a << c
                a = a + c & 4294967295 if '+' == b[d] else a ^ c
            return a

        g = []
        f = 0
        while f < len(a):
            c = ord(a[f])
            if 128 > c:
                g.append(c)
            else:
                if 2048 > c:
                    g.append((c >> 6) | 192)
                else:
                    if (55296 == (c & 64512)) and (f + 1 < len(a)) and (
                            56320 == (ord(a[f + 1]) & 64512)):
                        f += 1
                        c = 65536 + ((c & 1023) << 10) + (ord(a[f]) & 1023)
                        g.append((c >> 18) | 240)
                        g.append((c >> 12) & 63 | 128)
                    else:
                        g.append((c >> 12) | 224)
                        g.append((c >> 6) & 63 | 128)
                g.append((c & 63) | 128)
            f += 1

        e = TKK.split('.')
        h = int(e[0]) or 0
        t = h
        for item in g:
            t += item
            t = RL(t, '+-a^+6')
        t = RL(t, '+-3^+b+-f')
        t ^= int(e[1]) or 0
        if 0 > t:
            t = (t & 2147483647) + 2147483648
        result = t % 1000000
        return str(result) + '.' + str(result ^ h)
6天前 评论
讨论数量: 8

卧槽,你会requests了?

6天前 评论
Jason990420

这网页不是简单的requests.get就能爬下来的, 你没爬到正确的网页內容.

错误的内容

<body> <script>(function(){ ...

正确的内容

<body class="displaying-homepage show-result"> <script>(function(){ ...

所以找不到tlid-translation translation, 也就没有翻译的结果

別怪 find 函数, 它是无辜的.

6天前 评论
TNT_God 6天前
TNT_God 6天前
Jason990420

很难...

  1. 主要内容大都是由js传回, 再建立网页HTML内容, 和一般爬虫所对应的HTML不同, 所以变得很复杂.
  2. google本身很注重它的智慧财产权, 它会利用一些方法来确认是网页还是爬虫, 比如请求的内容涵盖的范围, 比如请求与响应之间的授权, 加密等等.
  3. 一旦它认为不是正常网页存取, 会封锁中断连线.
  4. 还有存取量上也有所限制, 太多了, 也会封锁中断连线. 所以一般都是采用google的api, 免费的也会有限制.
6天前 评论

我有一个运用google翻译的代码段

6天前 评论
Jason990420

贴上来看看啊

6天前 评论
import requests
import re
import json
import time


class GoogleTranslator():
    _host = 'translate.google.cn'

    _headers = {
        'Host': _host,
        'User-Agent':
        'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Mobile Safari/537.36',
        'Accept':
        'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
        'Accept-Language': 'zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',
        'Accept-Encoding': 'gzip, deflate, br',
        'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8',
        'Referer': 'https://' + _host,
        'Connection': 'keep-alive',
        'Cache-Control': 'max-age=0'
    }

    _language = {
        'afrikaans': 'af',
        'arabic': 'ar',
        'belarusian': 'be',
        'bulgarian': 'bg',
        'catalan': 'ca',
        'czech': 'cs',
        'welsh': 'cy',
        'danish': 'da',
        'german': 'de',
        'greek': 'el',
        'english': 'en',
        'esperanto': 'eo',
        'spanish': 'es',
        'estonian': 'et',
        'persian': 'fa',
        'finnish': 'fi',
        'french': 'fr',
        'irish': 'ga',
        'galician': 'gl',
        'hindi': 'hi',
        'croatian': 'hr',
        'hungarian': 'hu',
        'indonesian': 'id',
        'icelandic': 'is',
        'italian': 'it',
        'hebrew': 'iw',
        'japanese': 'ja',
        'korean': 'ko',
        'latin': 'la',
        'lithuanian': 'lt',
        'latvian': 'lv',
        'macedonian': 'mk',
        'malay': 'ms',
        'maltese': 'mt',
        'dutch': 'nl',
        'norwegian': 'no',
        'polish': 'pl',
        'portuguese': 'pt',
        'romanian': 'ro',
        'russian': 'ru',
        'slovak': 'sk',
        'slovenian': 'sl',
        'albanian': 'sq',
        'serbian': 'sr',
        'swedish': 'sv',
        'swahili': 'sw',
        'thai': 'th',
        'filipino': 'tl',
        'turkish': 'tr',
        'ukrainian': 'uk',
        'vietnamese': 'vi',
        'yiddish': 'yi',
        'chinese_simplified': 'zh-CN',
        'chinese_traditional': 'zh-TW',
        'auto': 'auto'
    }
    _url = 'https://' + _host + '/translate_a/single'
    _params = {
        'client': 'webapp',
        'sl': 'en',
        'tl': 'zh-CN',
        'hl': 'zh-CN',
        'dt': 'at',
        'dt': 'bd',
        'dt': 'ex',
        'dt': 'ld',
        'dt': 'md',
        'dt': 'qca',
        'dt': 'rw',
        'dt': 'rm',
        'dt': 'ss',
        'dt': 't',
        'otf': '1',
        'ssel': '0',
        'tsel': '0',
        'kc': '1'
    }

    __cookies = None

    __googleTokenKey = '376032.257956'
    __googleTokenKeyUpdataTime = 600.0
    __googleTokenKeyRetireTime = time.time() + 600.0

    def __init__(self, src='en', dest='zh-CN', tkkUpdataTime=600.0):
        if src not in self._language and src not in self._language.values():
            src = 'auto'
        if dest not in self._language and dest not in self._language.values():
            dest = 'auto'
        self._params['sl'] = src
        self._params['tl'] = dest
        self.googleTokenKeyUpdataTime = tkkUpdataTime
        self.__updateGoogleTokenKey()

    def __updateGoogleTokenKey(self):
        self.__googleTokenKey = self.__getGoogleTokenKey()
        self.__googleTokenKeyRetireTime = time.time(
        ) + self.__googleTokenKeyUpdataTime

    def __getGoogleTokenKey(self):
        """Get the Google TKK from https://translate.google.cn"""
        # TKK example: '435075.3634891900'
        result = ''
        try:
            res = requests.get('https://' + self._host, timeout=3)
            res.raise_for_status()
            self.__cookies = res.cookies
            result = re.search(r'tkk\:\'(\d+\.\d+)?\'', res.text).group(1)
        except requests.exceptions.ReadTimeout as ex:
            print('ERROR: ' + str(ex))
            time.sleep(1)
        return result

    def __getGoogleToken(self, a, TKK):
        """Calculate Google tk from TKK """

        # https://www.cnblogs.com/chicsky/p/7443830.html
        # if text = 'Tablet Developer' and TKK = '435102.3120524463', then tk = '315066.159012'

        def RL(a, b):
            for d in range(0, len(b) - 2, 3):
                c = b[d + 2]
                c = ord(c[0]) - 87 if 'a' <= c else int(c)
                c = a >> c if '+' == b[d + 1] else a << c
                a = a + c & 4294967295 if '+' == b[d] else a ^ c
            return a

        g = []
        f = 0
        while f < len(a):
            c = ord(a[f])
            if 128 > c:
                g.append(c)
            else:
                if 2048 > c:
                    g.append((c >> 6) | 192)
                else:
                    if (55296 == (c & 64512)) and (f + 1 < len(a)) and (
                            56320 == (ord(a[f + 1]) & 64512)):
                        f += 1
                        c = 65536 + ((c & 1023) << 10) + (ord(a[f]) & 1023)
                        g.append((c >> 18) | 240)
                        g.append((c >> 12) & 63 | 128)
                    else:
                        g.append((c >> 12) | 224)
                        g.append((c >> 6) & 63 | 128)
                g.append((c & 63) | 128)
            f += 1

        e = TKK.split('.')
        h = int(e[0]) or 0
        t = h
        for item in g:
            t += item
            t = RL(t, '+-a^+6')
        t = RL(t, '+-3^+b+-f')
        t ^= int(e[1]) or 0
        if 0 > t:
            t = (t & 2147483647) + 2147483648
        result = t % 1000000
        return str(result) + '.' + str(result ^ h)
6天前 评论

很有思路

5天前 评论
Jason990420

嗯, 原来以为是旧的google翻译, 确实可行

5天前 评论

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