環境： python3

直接上程式碼：

1.BaiDuTranslateWeb.py

import requests
import execjs
import json

class BaiDuTranslateWeb:
    def __init__(self):
        self.url = "https://fanyi.baidu.com/v2transapi"
        self.headers = {
            "Cookie": "BAIDUID=0799B7DBF23580D6354CF4181DDF775D:FG=1; BIDUPSID=0799B7DBF23580D6354CF4181DDF775D; PSTM=1538987683; REALTIME_TRANS_SWITCH=1; FANYI_WORD_SWITCH=1; HISTORY_SWITCH=1; SOUND_SPD_SWITCH=1; SOUND_PREFER_SWITCH=1; locale=zh; BDORZ=B490B5EBF6F3CD402E515D22BCDA1598; Hm_lvt_afd111fa62852d1f37001d1f980b6800=1542015910,1542015946,1542096657; Hm_lvt_64ecd82404c51e03dc91cb9e8c025574=1542096883,1542096893,1542096897,1542159331; delPer=0; H_PS_PSSID=1461_21108_27401_27376_26350_20718; PSINO=3; ZD_ENTRY=baidu; Hm_lpvt_64ecd82404c51e03dc91cb9e8c025574=1542163918; from_lang_often=%5B%7B%22value%22%3A%22en%22%2C%22text%22%3A%22%u82F1%u8BED%22%7D%2C%7B%22value%22%3A%22zh%22%2C%22text%22%3A%22%u4E2D%u6587%22%7D%5D; to_lang_often=%5B%7B%22value%22%3A%22zh%22%2C%22text%22%3A%22%u4E2D%u6587%22%7D%2C%7B%22value%22%3A%22en%22%2C%22text%22%3A%22%u82F1%u8BED%22%7D%5D",
            "Referer": "https://fanyi.baidu.com/?aldtype=16047",
            "User-Agent": "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36"
        }
        self.data = {
            "from": "zh",
            "to": "en",
            "query": None,
            "transtype": "translang",
            "simple_means_flag": 3,
            "sign": None,
            "token": "300f465c88543c5218f056447a33a348"
        }

    def get_baidu_sign(self):
        with open("baidusign.js") as f:
            jsData = f.read()
            sign = execjs.compile(jsData).call("e", self.input)
            return sign

    def run(self):
        self.input = input("請輸入要翻譯的內容：")
        self.get_baidu_sign()
        self.data["query"] = self.input
        self.data["sign"] = self.get_baidu_sign()
        response = requests.post(url=self.url,data=self.data,headers=self.headers)
        self.result_strs = response.content.decode()

    def get_translate_result(self):
        result_dict = json.loads(self.result_strs)
        if 'trans_result' in result_dict:
            result_dict = result_dict['trans_result']['data'][0] if len(result_dict['trans_result']['data']) > 0 else None
            result_dict = result_dict['result'][0] if len(result_dict['result']) > 0 else None
            result = result_dict[1] if len(result_dict) > 1 else None
            print("翻譯結果為：")
            print(result)
        else:
            print("請輸入內容再進行翻譯")

if __name__ == '__main__':
    while True:
        baidutranlate = BaiDuTranslateWeb()
        baidutranlate.run()
        baidutranlate.get_translate_result()
 

2.baidusign.js ,BaiDuTranslateWeb.py內部呼叫baidusign.js獲取百度翻譯簽名sign的值

var i = "320305.131321201"

function n(r, o) {
    for (var t = 0; t < o.length - 2; t += 3) {
        var a = o.charAt(t + 2);
        a = a >= "a" ? a.charCodeAt(0) - 87 : Number(a), a = "+" === o.charAt(t + 1) ? r >>> a : r << a, r = "+" === o.charAt(t) ? r + a & 4294967295 : r ^ a
    }
    return r
}


function e(r) {
    var o = r.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g);
    if (null === o) {
        var t = r.length;
        t > 30 && (r = "" + r.substr(0, 10) + r.substr(Math.floor(t / 2) - 5, 10) + r.substr(-10, 10))
    } else {
        for (var e = r.split(/[\uD800-\uDBFF][\uDC00-\uDFFF]/), C = 0, h = e.length, f = []; h > C; C++) "" !== e[C] && f.push.apply(f, a(e[C].split(""))), C !== h - 1 && f.push(o[C]);
        var g = f.length;
        g > 30 && (r = f.slice(0, 10).join("") + f.slice(Math.floor(g / 2) - 5, Math.floor(g / 2) + 5).join("") + f.slice(-10).join(""))
    }
    var u = void 0, l = "" + String.fromCharCode(103) + String.fromCharCode(116) + String.fromCharCode(107);
    u = null !== i ? i : (i = window[l] || "") || "";
    for (var d = u.split("."), m = Number(d[0]) || 0, s = Number(d[1]) || 0, S = [], c = 0, v = 0; v < r.length; v++) {
        var A = r.charCodeAt(v);
        128 > A ? S[c++] = A : (2048 > A ? S[c++] = A >> 6 | 192 : (55296 === (64512 & A) && v + 1 < r.length && 56320 === (64512 & r.charCodeAt(v + 1)) ? (A = 65536 + ((1023 & A) << 10) + (1023 & r.charCodeAt(++v)), S[c++] = A >> 18 | 240, S[c++] = A >> 12 & 63 | 128) : S[c++] = A >> 12 | 224, S[c++] = A >> 6 & 63 | 128), S[c++] = 63 & A | 128)
    }
    for (var p = m, F = "" + String.fromCharCode(43) + String.fromCharCode(45) + String.fromCharCode(97) + ("" + String.fromCharCode(94) + String.fromCharCode(43) + String.fromCharCode(54)), D = "" + String.fromCharCode(43) + String.fromCharCode(45) + String.fromCharCode(51) + ("" + String.fromCharCode(94) + String.fromCharCode(43) + String.fromCharCode(98)) + ("" + String.fromCharCode(43) + String.fromCharCode(45) + String.fromCharCode(102)), b = 0; b < S.length; b++) p += S[b], p = n(p, F);
    return p = n(p, D), p ^= s, 0 > p && (p = (2147483647 & p) + 2147483648), p %= 1e6, p.toString() + "." + (p ^ m)
}
 

3.其它翻譯

百度翻譯（手機版）： 最新百度翻譯爬蟲 手機版（python爬蟲）

有道翻譯：最新有道翻譯爬蟲教程 （python爬蟲）