[技术交流] 巨好用的翻译工具，需要改进，求助攻，找bug

import urllib.request
import urllib.parse
import json
from tkinter import*


root = Tk()
root.wm_attributes('-topmost',1)
root.geometry('+1300+40')
root.minsize(300,10)

result = ('<---请输入需要翻译的内容')
#输出翻译
get = Label(root,text=result)
get.pack(side=RIGHT)


def translate(event=None):
    url = "http://fanyi.youdao.com/translate?smartresult=dict&smartresult=rule&sessionFrom="
    head = {}
    head['User-Agent'] = 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36'
    data = {}
    
    data['i'] = post_text.get()
    data['from'] = 'AUTO'
    data['to'] = 'AUTO'
    data['smartresult'] = 'dict'
    data['client'] = 'fanyideskweb'
    data['salt'] = '1504859416218'
    data['sign'] = '54d324206580658df5cf8839219bd7c1'
    data['doctype'] = 'json'
    data['version'] = '2.1'
    data['keyfrom'] = 'fanyi.web'
    data['action'] = 'FY_BY_CLICKBUTTION'
    data['typoResult'] = 'true'
    data = urllib.parse.urlencode(data).encode('utf-8')
    response = urllib.request.urlopen(url,data)
    html = response.read().decode('utf-8')
    target = json.loads(html)
    result = target['translateResult'][0][0]['tgt']
    #print(result)
    get['text'] = result

    
#输入文字
post_text = StringVar()
post = Entry(root,validate='key',textvariable=post_text)
post.focus_set()
post.pack(side=LEFT,padx=5,pady=5)
post.bind('<Return>',translate)


root.mainloop()