JSONDecodeError：期望属性名称用双引号引起来

Question

我收到错误：“ JSONDecodeError：期望属性名称用双引号引起：第1行第2列（字符1）”

JSONDecodeError                           Traceback (most recent call last)
<ipython-input-125-87ecd9aa8181> in <module>()
2                     access_token=config['oanda']['access_token'])
3 mt.rates(account_id=config['oanda']['account_id'],
----> 4          instruments=['DE30_EUR'], ignore_heartbeat=True)

运行以下代码行时：

mt = MomentumTrader(momentum=12, environment='practice',
                access_token=config['oanda']['access_token'])
mt.rates(account_id=config['oanda']['account_id'],
     instruments=['DE30_EUR'], ignore_heartbeat=True)`

它取自https://www.oreilly.com/learning/algorithmic-trading-in-less-than-100-lines-of-python-code

我试图将单引号改为双引号，但是没有运气，仍然会出现错误。

谢谢！