擅长:python、mysql、java
<p>一本字典就好了:</p>
<pre class="lang-py prettyprint-override"><code>chemicals = dict()
index = 1
while True:
chemical = input(f"Enter chemical {index}: ")
if chemical == " ":
break
else:
chemicals[chemical] = input("Enter the amount: ")
index += 1
print(chemicals)
</code></pre>