[Python] Invalid indice in Python array

I don't understand why my program keep returning

only integers, slices (`:`), ellipsis (`...`), numpy.newaxis (`None`)
and integer or boolean arrays are valid indices


I obviously have an integer in my array but it still give me the same error. I think this problem is pretty simple but I don't understand.

my program and the error :

def Mandelbrot(c):
z=0
zn = 0
i = 0
boo = True
while boo == True and i < 50:
if abs(zn) < 100:
zn = z**2 + c
boo = True
z = zn
i = i+1
else :
boo = False
return i

print (Mandelbrot(-2+1j*(-1.5)))

import math
import numpy
import matplotlib.pyplot as plt
from IPython.display import display_image
T=numpy.ndarray(shape=(500,500,3))
lig = -2
col = -1.5
while lig <=1:
while col <= 1.5:
c = lig + 1j * col
v = Mandelbrot(c)
print(v)
if v < 50:
u = False
else:
u = True
print(int(u))
T[lig][col]=[v]
lig = lig + 0.001
col = col + 0.001

display_image(T)

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