<p>我正在运行以下代码,但我收到错误消息“float”对象不支持项分配。我想要的输出是将这些计算的结果附加到向量Vi中</p>
<pre><code>import numpy as np
MolWeight = [132, 320, 29, 45, 10]
Ci = 10 # g/L initial Concentration
Cf = 50*10**(-6) #M final Concentration
Vf = 100*10**(-6) #Litre final Volume
Vi = []
for i in range(len(MolWeight)):
#How many moles of the compounds are there in the standard solution
Mi = Ci/MolWeight[i] #M
#this corresponds to the initial concentration of the standard compound
Ci = Mi #M/L
#I calculate the volume to extract from the standard compound solution, so to obtain the desired concentration
np.<a href="https://www.cnpython.com/list/append" class="inner-link">append</a>.Vi[i] = (Cf*Vf)/Ci #L
</code></pre>