擅长:python、mysql、java
<p>我想你是在试图循环<code>r["current"]</code>:</p>
<pre class="lang-py prettyprint-override"><code>for key, value in r["current"].items():
# for first iteration:
# key is afghan_usd
# value is {'p': ....}
try:
price = value["p"]
except TypeError: # value is a string
price = value
last_prices = float(price.replace(',', ''))
z.append(last_prices)
mid.append(mean(z))
</code></pre>