python 第54课：爬虫小问题

Peteryo01223

问题：我跟随FishC视频，在有道翻译上做练习，run 后不成功，提示为

{"errorCode":50}

为何？

我的尝试如下：

import urllib.request
import urllib.parse

url = 'https://fanyi.youdao.com/translate_o?smartresult=dict&smartresult=rule'

data = {}

data['i'] = 'I love fish'
data['from'] = 'AUTO'
data['to'] = 'AUTO'
data['smartresult'] = 'dict'
data['client'] = 'fanyideskweb'
data['salt'] = '16202807937423'
data['sign'] = 'bbabea51cd64429d807bf3a4b1799e6c'
data['lts'] = '1620280793742'
data['bv'] = '74d66c0748efe9ba6ee38293a33b65d3'
data['doctype'] = 'json'
data['version'] = '2.1'
data['keyfrom'] = 'fanyi.web'
data['action'] = 'FY_BY_CLICKBUTTION'

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

response = urllib.request.urlopen(url, data)
html = response.read().decode('utf-8')

print(html)

由于视频拍摄于2014年，与2021年我电脑情况，肯定有所不同。其中，关键的 request URL 和 Form data，如下，见两个截图：

请高手指点迷津！

Peteryo01223

网上搜索了一下，我把 URL 中 的一个 _o  给删除了。然后，鼓捣了一下，竟然成功了。如下。但不知道背后的原因是什么。

import urllib.request
import urllib.parse
import json

content = input('请输入需要翻译的内容：')

url = 'https://fanyi.youdao.com/translate?smartresult=dict&smartresult=rule'

data = {}

data['i'] = content
data['from'] = 'AUTO'
data['to'] = 'AUTO'
data['smartresult'] = 'dict'
data['client'] = 'fanyideskweb'
data['salt'] = '16202807937423'
data['sign'] = 'bbabea51cd64429d807bf3a4b1799e6c'
data['lts'] = '1620280793742'
data['bv'] = '74d66c0748efe9ba6ee38293a33b65d3'
data['doctype'] = 'json'
data['version'] = '2.1'
data['keyfrom'] = 'fanyi.web'
data['action'] = 'FY_BY_CLICKBUTTION'

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('翻译结果:%s' % (target['translateResult'][0][0]['tgt']))