python調取google翻譯接口翻譯

# -*- coding:utf-8 -*
import execjs
from urllib.request import quote
import requests
import pymysql

class Py4Js():
"""獲取加密參數tk"""
    def __init__(self):
        self.ctx = execjs.compile("""
        function TL(a) {
        var k = "";
        var b = 406644;
        var b1 = 3293161072;
        var jd = ".";
        var $b = "+-a^+6";
        var Zb = "+-3^+b+-f";
        for (var e = [], f = 0, g = 0; g < a.length; g++) {
            var m = a.charCodeAt(g);
            128 > m ? e[f++] = m : (2048 > m ? e[f++] = m >> 6 | 192 : (55296 == (m & 64512) && g + 1 < a.length && 56320 == (a.charCodeAt(g + 1) & 64512) ? (m = 65536 + ((m & 1023) << 10) + (a.charCodeAt(++g) & 1023),
            e[f++] = m >> 18 | 240,
            e[f++] = m >> 12 & 63 | 128) : e[f++] = m >> 12 | 224,
            e[f++] = m >> 6 & 63 | 128),
            e[f++] = m & 63 | 128)
        }
        a = b;
        for (f = 0; f < e.length; f++) a += e[f],
        a = RL(a, $b);
        a = RL(a, Zb);
        a ^= b1 || 0;
        0 > a && (a = (a & 2147483647) + 2147483648);
        a %= 1E6;
        return a.toString() + jd + (a ^ b)
    };
    function RL(a, b) {
        var t = "a";
        var Yb = "+";
        for (var c = 0; c < b.length - 2; c += 3) {
            var d = b.charAt(c + 2),
            d = d >= t ? d.charCodeAt(0) - 87 : Number(d),
            d = b.charAt(c + 1) == Yb ? a >>> d: a << d;
            a = b.charAt(c) == Yb ? a + d & 4294967295 : a ^ d
        }
        return a
    }
    """)

    def getTk(self, text):
        return self.ctx.call("TL", text)

def open_url(url):
    """
    獲取原始文本
    注意：google會對每個ip進行檢測，每個ip只能調用上千次，建議請求時帶上代理
    :param url: 
    :return: 
    """
    headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0'}
    data = requests.get(url=url, headers=headers).text
    return data

def translate(content):
    """
    翻譯，返回翻譯的結果
    注意：本例是英譯中，要是中譯英要把url中的‘sl=en&tl=zh-CN’換成‘sl=zh-CN&tl=en’即可
    :param content:傳入待翻譯的文本
    :return:
    """
    js = Py4Js()
    tk = js.getTk(content)
    content = quote(content)
    url = "https://translate.google.cn/translate_a/single?client=webapp&sl=en&tl=zh-CN&hl=EN&dt=at&dt=bd&dt=ex&dt=ld&dt=md&dt=qca" \
          "&dt=rw&dt=rm&dt=ss&dt=t&ie=UTF-8&oe=UTF-8&clearbtn=1&otf=1&pc=1" \
          "&srcrom=0&ssel=0&tsel=0&kc=2&tk=%s&q=%s" % (tk, content)

    result = open_url(url)
    end = result.find("\",")
    if end > 4:
        texts = result[4:end]
        return texts

if __name__ == "__main__":
    print(translate('需要翻譯的文本')) 

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