python - 追加在程序中多次调用时会返回语法错误

Question

我正在尝试编写一个简单的函数。它是一个根据所提供的质子数的值而呈现不同形式的函数。

质子数在名为“Z_min”的列表中提供。

我需要做的是计算函数并将值存储在数组中，以便稍后绘制值。

我对 Python 有点生疏，但我尝试存储计算值的方式是使用 .append 将其添加到我的 python 程序中的列表中，但是每当 .append 时，这都会带回语法错误在 for 循环内多次调用。但是，根据循环的构造方式，.append 只能在单次迭代的循环体中调用一次。

您能帮我弄清楚为什么会发生这种情况吗？

import math as m
import matplotlib.pyplot as plt
import numpy as np

a_V = 15.75
a_S = 17.8
a_C = 0.711
a_A = 23.695
a_P = 11.2

Z_min = []
A = []
BA = []

for A_idx in range(0,301):
    Z_min_val = (A_idx/2) * (1 +(a_C/(4*a_A))*A_idx**(2/3))**(-1)
    A.append(A_idx)
    Z_min.append(round(Z_min_val))


for i in Z_min:
    if (A[i]%2 == 0):
        if (Z_min[i]%2) == 0:
            #print("This is even: ", Z_min[i])
            if (A[i] == 0):
                BA_val = 0
                BA.append(BA_val)
            else:
                BA_val = (a_V*A[i] - a_S*(A[i])**(2/3) - a_C*(Z_min[i](Z_min[i]-1))/((A[i])**(1/3)) - a_A((A[i]-2*Z_min[i])**2)/(A[i]) + a_P*(A[i])**(-1/2))
                BA.append(BA_val)
        else:
            #print("This is odd: ", Z_min[i])
            BA_val = (a_V*A[i] - a_S*(A[i])**(2/3) - a_C*(Z_min[i](Z_min[i]-1))/((A[i])**(1/3)) - a_A((A[i]-2*Z_min[i])**2)/(A[i]) - a_P*(A[i])**(-1/2))
            BA.append(BA_val)
    else:
        B_by_A_val = (a_V*A[i] - a_S*(A[i])**(2/3) - a_C*(Z_min[i](Z_min[i]-1))/((A[i])**(1/3)) - a_A((A[i]-2*Z_min[i])**2)/(A[i]))
        B_by_A.append(B_by_A_val)

Answer 1

我猜您可能想在一些地方使用 *:

import math as m
import matplotlib.pyplot as plt
import numpy as np

a_V = 15.75
a_S = 17.8
a_C = 0.711
a_A = 23.695
a_P = 11.2

Z_min = []
A = []
BA = []
B_by_A = []

for A_idx in range(0,301):
    Z_min_val = (A_idx/2) * (1 +(a_C/(4*a_A))*A_idx**(2/3))**(-1)
    A.append(A_idx)
    Z_min.append(round(Z_min_val))


for i in Z_min:
    if (A[i]%2 == 0):
        if (Z_min[i]%2) == 0:
            #print("This is even: ", Z_min[i])
            if (A[i] == 0):
                BA_val = 0
                BA.append(BA_val)
            else:
                BA_val = (a_V*A[i] - a_S*(A[i])**(2/3) - a_C*(Z_min[i]*(Z_min[i]-1))/((A[i])**(1/3)) - a_A*((A[i]-2*Z_min[i])**2)/(A[i]) + a_P*(A[i])**(-1/2))
                BA.append(BA_val)
        else:
            #print("This is odd: ", Z_min[i])
            BA_val = (a_V*A[i] - a_S*(A[i])**(2/3) - a_C*(Z_min[i]*(Z_min[i]-1))/((A[i])**(1/3)) - a_A*((A[i]-2*Z_min[i])**2)/(A[i]) - a_P*(A[i])**(-1/2))
            BA.append(BA_val)
    else:
        B_by_A_val = (a_V*A[i] - a_S*(A[i])**(2/3) - a_C*(Z_min[i]*(Z_min[i]-1))/((A[i])**(1/3)) - a_A*((A[i]-2*Z_min[i])**2)/(A[i]))
        B_by_A.append(B_by_A_val)