python爬取有道翻译出错 {‘errorcode’:50}

在用urllib对有道翻译进行爬取时，出现了错误。

import urllib.request

import urllib.parse

import json

content = input("Enter the words needs translated:")

url = "http://fanyi.youdao.com/translate?smartresult=dict&smartresult=ugc"

data = {}

data['i'] = content

data['from'] = 'AUTO'

data['to']='AUTO'

data['smartresult']='dict'

data['client']='fanyideskweb'

data['salt']='1513663501217'

data['sign']='6a516734349a812792c07491f639609e'

data['doctype'] = 'json'

data['version'] = '2.1'

data['keyfrom']='fanyi.web'

data['action']='FY_BY_REALTIME'

data['typoResult']='false'

data = urllib.parse.urlencode(data).encode('utf-8')

response = urllib.request.urlopen(url,data)

html = response.read().decode('utf-8')

target = json.loads(html)
print("result: %s" % (target['translateResult'][0][0]['tgt']))

将在审查元素中获得的url中translate后面的_o去掉，错误就消失了，可以正常爬取。不知道为什么

刚刚又试了一下，data除了doctype键和i键不能去掉，其余的即使删除了也能正常运行翻译。