Python json library not parsing valid json string?

Question

I am trying to parse json obtained from this api call: https://poloniex.com/public?command=returnTicker

But when I run the commands:

    print site_name
    site = urllib2.Request(site_name)

    response=urllib2.urlopen(site_name) 

    print response.read()

    t= json.loads(response.read())

I get:

https://poloniex.com/public?command=returnTicker
{"BTC_BCN":  ... (rest of json response)
ValueError: No JSON object could be decoded

I have validated the resulting json object using www.jsonlint.com and it is valid. What am I doing wrong?

You get a urllib2.HTTPError: HTTP Error 403: Forbidden error. — cs95
– cs95, Commented Jul 20, 2017 at 18:47

Jean-François Fabre · Accepted Answer · 2017-07-20 18:47:31Z

3

if you print response.read(), then the next time you try to read from it you'll get an empty string.

Empty string is not a valid json string.

answered Jul 20, 2017 at 18:47

Jean-François Fabre♦

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2 Comments

cs95 Over a year ago

This is one thing. All I get is a 403 error with urllib2. Works with requests. Did you try it? Edit: nvm, seems to work for OP.

Jean-François Fabre Over a year ago

No I didn't. Isn't there different versions of urllib2 and you're using one which is not that good? As you said, question shows that OP successfully prints some valid response, flushing the stream in the process :)

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