python200行代码实现一个翻译软件

python200行代码实现一个翻译软件

心血来潮写一个命令行的翻译软件方便使用(基于百度翻译api), 话不多说上代码-_-

• 支持从文件输入输出

• 支持从剪切板输入输出

#!/home/fyang/.virtualenvs/base/bin/python
import requests
import random
import hashlib
import json
import urllib
import pyperclip
from sys import exit
from optparse import OptionParser


APP_ID="**********"
KEY="**********"

# global option
class Conf:

    DEFAULT = 1 # stanted
    FILE = 2 # file
    CLIPBOARD = 3 # clipboard

    langs = {
        "en": "英文",
        "zh": "中文",
        "yue": "粤语",
        "wyw": "文言文",
        "jp": "日语",
        "kor": "韩语",
        "fra": "法语",
        "spa": "西班牙语",
        "th": "泰语",
        "ara": "阿拉伯语",
        "ru": "俄语",
        "pt": "葡萄牙语",
        "de": "德语",
        "it": "意大利语",
        "el": "希腊语",
        "nl": "荷兰语",
        "pl": "波兰语",
        "bul": "保加利亚语",
        "est": "爱沙尼亚语",
        "dan": "丹麦语",
        "fin": "芬兰语",
        "cs": "捷克语",
        "rom": "罗马尼亚语",
        "slo": "斯洛文尼亚语",
        "swe": "瑞典语",
        "hu": "匈牙利语",
        "cht": "繁体中文",
        "vie": "越南语"
    }

    SYS_IN = DEFAULT
    SYS_OUT = DEFAULT
    trans_from = "en"
    trans_to = "zh"
    query_str = ""
    input_file = ""
    output_file = ""


def printArgs():
    print(Conf.SYS_IN)
    print(Conf.SYS_OUT)
    print(Conf.trans_from)
    print(Conf.trans_to)
    print(Conf.query_str)
    print(Conf.input_file)
    print(Conf.output_file)


def main():
    # init
    option_handle()
    # start query
    query()


def option_handle():
    usage = "usage: %prog [option] arg"
    opt_parser = OptionParser()
    opt_parser.add_option(
        "-f", "--from",
        dest="trans_from",
        default="en",
        help="default=en\t\t\t\t\ten...english   zh...chinese --list show all language code."
    )
    opt_parser.add_option(
        "-t", "--to",
        dest="trans_to",
        default="zh",
        help="default=zh\t\t\t\t\ten...english   zh...chinese. --list show all language code."
    )
    opt_parser.add_option(
        "-p", "--paste",
        action="store_true",
        dest="paste",
        help="use cilpboard content."
    )
    opt_parser.add_option(
        "-i", "--inputfile",
        dest="in_file",
        help="type file path to input."
    )
    opt_parser.add_option(
        "-o", "--outputfile",
        dest="out_file",
        help="type file path to output."
    )
    opt_parser.add_option(
        "-q", "--query",
        dest="query_str",
        help="translate content."
    )
    opt_parser.add_option(
        "-c", "--clipboard",
        dest="copy",
        action="store_true",
        help="output to clipboard."
    )
    opt_parser.add_option(
        "-l", "--list",
        dest="list_all",
        action="store_true",
        help="show all language code."
    )
    (options, args) = opt_parser.parse_args()
    if options.list_all:
        print("all language code: ")
        for k, v in Conf.langs.items():
            print(k, " ", v)
        exit(0)
    if len(args) > 1:
        opt_parser.error("incorrent number of arguments")
        exit(0)
    # from
    if options.trans_from not in list(Conf.langs.keys()):
        opt_parser.error("invalid translate_from language code. --list show all code")
        exit(0)
    Conf.trans_from = options.trans_from
    # to
    if options.trans_to not in list(Conf.langs.keys()):
        opt_parser.error("invalid translata_to language code. --list show all code")
        exit(0)
    Conf.trans_to = options.trans_to
    # query
    if len(args) == 1:
        Conf.query_str = args[0]
    elif options.paste:
        Conf.SYS_IN = Conf.CLIPBOARD
        Conf.query_str = pyperclip.paste()
    elif options.in_file:
        Conf.SYS_IN = Conf.FILE
        Conf.input_file = options.in_file
        try:
            with open(Conf.input_file, "r+") as in_file:
                for line in in_file.readlines():
                    Conf.query_str += line.replace("\n", " ")
        except:
            opt_parser.error("\n[error]: No such file: " + options.in_file)
    else:
        Conf.SYS_IN = Conf.CLIPBOARD
        Conf.query_str = pyperclip.paste()
    # out
    if options.copy:
        Conf.SYS_OUT = Conf.CLIPBOARD
    elif options.out_file:
        Conf.SYS_OUT = Conf.FILE
        Conf.output_file = options.out_file
    else:
        # Conf.SYS_OUT = Conf.DEFAULT
        pass

    
        


def query() -> dict:
    try:
        resp = requests.get(url_handle(Conf.query_str, Conf.trans_from, Conf.trans_to), timeout=5)
        print_result(json.loads(resp.content))
    except requests.RequestException:
        print("[error] network is too slow.")
        exit(0)
    


def url_handle(query_str: str, _from: str, _to: str) -> str:
    # 
    base_url = "https://fanyi-api.baidu.com/api/trans/vip/translate?"
    form_data = {
        "q": query_str,
        "from": _from,
        "to": _to,
        "appid": APP_ID,
        "salt": str(random.randint(1000000, 99999999))
    }
    form_data['sign'] = get_md5_token(APP_ID + form_data["q"] + form_data["salt"] + KEY)
    form_data['q'] = urllib.parse.quote(form_data['q'])
    for k, v in form_data.items():
        base_url += k + "=" + v + "&"
    return base_url[:-1]


def print_result(data: dict):
    try:
        source_str = data['trans_result'][0]['src']
        dest_str = data['trans_result'][0]['dst']
    except Exception:
        print("[error] please check your arguments and try again.")
        exit(0)
    if Conf.SYS_OUT == Conf.DEFAULT:
        print("[source]: ", source_str)
        print("[dest]: ", dest_str)
    elif Conf.SYS_OUT == Conf.FILE:
        try:
            with open(Conf.output_file, "w+") as of:
                of.write("[source]\n")
                of.write(source_str + "\n")
                of.write("[dest]\n")
                of.write(dest_str)
        except PermissionError:
            print("[error] Permission denied: ", Conf.output_file)
    else:
        pyperclip.copy(dest_str)


def get_md5_token(key: str) -> str:
    _md5 = hashlib.md5()
    _md5.update(key.encode("utf-8"))
    return _md5.hexdigest()


if __name__ == '__main__':
    main()