<p>除了忘记解码,您只能读取一次响应<em>。已经调用了<code>.read()</code>,第二个调用返回一个空字符串。</p>
<p>只调用<code>.read()</code>一次,然后将数据解码为字符串:</p>
<pre><code>data = webURL.read()
print(data)
encoding = webURL.info().get_content_charset('utf-8')
JSON_object = json.loads(data.decode(encoding))
</code></pre>
<p><a href="https://docs.python.org/3/library/email.message.html#email.message.EmailMessage.get_content_charset" rel="noreferrer">^{<cd3>} call</a>告诉您服务器认为使用了什么字符集。</p>
<p>演示:</p>
<pre><code>>>> import json
>>> import urllib.request
>>> urlData = "http://api.openweathermap.org/data/2.5/weather?q=Boras,SE"
>>> webURL = urllib.request.urlopen(urlData)
>>> data = webURL.read()
>>> encoding = webURL.info().get_content_charset('utf-8')
>>> json.loads(data.decode(encoding))
{'coord': {'lat': 57.72, 'lon': 12.94}, 'visibility': 10000, 'name': 'Boras', 'main': {'pressure': 1021, 'humidity': 71, 'temp_min': 285.15, 'temp': 286.39, 'temp_max': 288.15}, 'id': 2720501, 'weather': [{'id': 802, 'description': 'scattered clouds', 'icon': '03d', 'main': 'Clouds'}], 'wind': {'speed': 5.1, 'deg': 260}, 'sys': {'type': 1, 'country': 'SE', 'sunrise': 1443243685, 'id': 5384, 'message': 0.0132, 'sunset': 1443286590}, 'dt': 1443257400, 'cod': 200, 'base': 'stations', 'clouds': {'all': 40}}
</code></pre>