当请求的网站明显是JSON时，没有JSON对象可以被解码

Question

我正在写一个小型的python应用程序，它会在livecoin.net上更新我的投资组合。我使用livecoin.net API以及coinmarketcap.com API。请求当从coinmarketcap.com API，如果你去它（https://api.coinmarketcap.com/v1/ticker/bitcoin/），该页面被明确JSON，我得到这个错误：

Traceback (most recent call last): 
    File "C:/Users/other/Desktop/livecoin.py", line 89, in <module> 
    cmcData = getCoinMarketCapData(balances) 
    File "C:/Users/other/Desktop/livecoin.py", line 22, in getCoinMarketCapData 
    cmcData = json.load(cmcResponse) 
    File "C:\Python27\lib\json\__init__.py", line 291, in load 
    **kw) 
    File "C:\Python27\lib\json\__init__.py", line 339, in loads 
    return _default_decoder.decode(s) 
    File "C:\Python27\lib\json\decoder.py", line 364, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
    File "C:\Python27\lib\json\decoder.py", line 382, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 

我得到的页面是很清楚JSON正如我刚才所说，所以我真的不知道为什么会发生这种情况。任何人都可以帮我吗？

我很清楚，这不是一个慈善代码工作的网站，但我非常难过，这是我的计划Z ...如果你愿意帮忙，甚至不需要为我编写任何代码，试着指出我错在哪里。谢谢：d

这里是我的代码：

# -*- coding: utf-8 -*- 
import httplib 
import urllib 
import json 
import hashlib 
import hmac 
from collections import OrderedDict 

def getCoinMarketCapData(currencies): 
    returns = {} 

    cmcUrl = "api.coinmarketcap.com" 
    cmcMethod = "/v1/ticker/" 

    conn = httplib.HTTPSConnection(cmcUrl) 

    for item in currencies: 
     print item['name'].split(" ")[0].lower(); 
     print cmcMethod+(item['name'].split(" ")[0].lower()) 
     conn.request("GET", cmcMethod+(item['name'].split(" ")[0].lower())) 
     cmcResponse = conn.getresponse() 
     cmcData = json.load(cmcResponse) 
     c = {"name":item['name'].split(" ")[0], "currency":item['symbol'],  "price_usd":cmcData[0]['price_usd'], "price_btc":cmcData[0]['price_btc'], "d1h":cmcData[0]['percent_change_1h'], "d24h":cmcData[0]['percent_change_24h'], "d7d":cmcData[0]['percent_change_7d'], "value":0.0} 
    returns[item['symbol']] = c 

    conn.close() 

    return returns 


def getData(dataDict, method, server, key, secret): 
    encoded_data = urllib.urlencode(dataDict) 

    sign = hmac.new(secret, msg=encoded_data,  digestmod=hashlib.sha256).hexdigest().upper() 

    headers = {"Api-key":key, "Sign":sign} 

    conn = httplib.HTTPSConnection(server) 
    conn.request("GET", method + '?' + encoded_data, '', headers) 

    response = conn.getresponse() 
    data = json.load(response) 
    conn.close() 

    return data 

def outputLine(key, value, prefix, suffix): 
    spaces = "" 
    pslen = len(prefix) + len(suffix) 
    key = key.upper() 
    key = " " + key + ": " 
    keylen = len(key) 
    x = 35-keylen-pslen 
    for count in range(x-len(str(value))): 
     spaces += " " 
    return key + prefix + value + suffix + spaces 

server = "api.livecoin.net" 
balancesMethod = "/payment/balances" 
coinInfoMethod = "/info/coinInfo" 
api_key = "gEuyw7k4WvAhdXUmG36zHDksDZGR3fvq" 
secret_key = "D4aTtN6tPxBqqDG24PFZ1238CMektp33" 
responses = [] 
names = [] 
balances = [] 

namesJSON = getData([], coinInfoMethod, server, api_key, secret_key)['info'] 
for name in namesJSON: 
    names.append({"name":name['name'], "symbol":name['symbol']}) 

data = OrderedDict([]) 
d = getData(data, balancesMethod, server, api_key, secret_key) 
responses.append(d) 

for currency in responses[0]: 
    if currency['value'] > 0.0 and currency['type'] == 'total': 
     for name in names: 
      if name['symbol'] == currency['currency']: 
       currency['name'] = name['name'] 
     balances.append(currency) 

ownedCoins = [] 

for balance in balances: 
    ownedCoins.append({"name":balance['name'], "symbol":balance['currency']}) 

print ownedCoins 

cmcData = getCoinMarketCapData(balances) 

for balance in balances: 
    try: 
     cmcData[balance['currency']]['value'] = balance['value'] 
    except: 
    continue 

for coin in ownedCoins: 
    print coin 
    item = cmcData[str(coin)] 
    v = item['value'] 
    v = "%f" % (v) 

    print "+-----------------------------------+" 
    print "|" + outputLine('currency', item['currency'], "", "") + "|" 
    print "|" + outputLine('amount owned', v, "", "") + "|" 
    print "|" + outputLine('price in usd', item['price_usd'], "$", "") + "|" 
    print "|" + outputLine('price in btc', item['price_btc'], u'\u20BF', "") + "|" 
    print "|" + outputLine('% change 1h', item['d1h'], "", "%") + "|" 
    print "|" + outputLine('% change 24h', item['d24h'], "", "%") + "|" 
    print "|" + outputLine('% change 7d', item['d7d'], "", "%") + "|" 
    print "+-----------------------------------+" 
    print "\n" 

Answer 1

我已经能够使用下面的代码加载JSON：

import urllib, json 
url = "https://api.coinmarketcap.com/v1/ticker/bitcoin/" 
response = urllib.urlopen(url) 
data = json.loads(response.read()) 

当我试图用json.load代替json.loads我有一个错误（与你的不同），但它可能会给你一个关于可能出错的提示。