python - 是否可以在不使用 numpy 的情况下在 Python 中编写这两个函数？

Question

我试图在不使用 Numpy 的情况下进行绘图，但是我可以写什么来替代以下函数？

我发现的一些函数的替代方案给出了不同的输出。

vel = np.zeros([n, m, 2], dtype = float) -----> vel = [ [ [0.0  for i in range(2)] for j in range(m) ] for k in range(n) ] gives different output.

xlins = np.linspace(0, m-1, m) ------> xlins = [i for i in range(m)] did not run. 


psi = 2d array

def PlotData(psi, m, n, scale):
    psi = list(map(list, zip(*psi)))

    #psi = np.flip(psi, 0)
    psi = psi[::-1]
    vel = np.zeros([n, m, 2], dtype = float)
    #vel = [ [ [0.0  for i in range(2)] for j in range(m) ] for k in range(n)]
    #rgb = np.zeros([n, m, 3], dtype = int)
    rgb = [ [ [0  for i in range(3)] for j in range(m) ] for k in range(n) ]
.
.
.
.

    xlins = np.linspace(0, m-1, m)
    #xlins = [i for i in range(m)]
    ylins = np.linspace(0, n-1, n)
    #ylins = [float(i) for i in range(m)]
    plt.streamplot(xlins, ylins, vel[:,:,0], vel[:,:,1], color='k', density=1)

我想在不使用 Numpy 的情况下获得相同的输出。