Arrays in MATLAB and PYTHON

[cokhuatlanyeuthuongconhetmuc]

import math
import numpy as np
from matplotlib import pyplot as plt
import pandas as pd

def fx(R, alpha):
    x = R*math.cos(alpha)
    y = R*math.sin(alpha)
    return x,y

alpha = np.linspace(0, math.pi*2, num = 10000)
Rmax = 100000
for i in range(alpha):
    (x[i], y[i]) = fx(Rmax, alpha[i])

Error:
TypeError                                 Traceback (most recent call last)
<ipython-input-14-8444e88ffbda> in <module>
      2 alpha = np.linspace(0, math.pi*2, num = 10000)
      3 Rmax = 100000
----> 4 for i in range(alpha):
      5     (x[i], y[i]) = fx(Rmax, alpha[i])
      6 

TypeError: only integer scalar arrays can be converted to a scalar index

Here is my code and error.