from PIL import Image
import numpy as np
im = Image.open("/Users/Hugo/green_leaves.jpg")
im.load()
height, widht = im.size
p = np.array([0,0,0])
for row in range(height):
     for col in range(widht):
         a = im.getpixel((row,col))
         p = np.append(a.asarray())

Traceback (most recent call last):
   File "/Users/hugo/PycharmProjects/Meteo API/image.py", line 17, in <module>
     p = np.append(a.asarray())
 AttributeError: 'tuple' object has no attribute 'asarray'

from PIL import Image
import numpy as np
im = Image.open("/Users/Hugo/green_leaves.jpg")
p = np.array(im)

p = p.reshape(-1, p.shape[2])

p=[]
for row in range(height):
     for col in range(widht):
         a = im.getpixel((row,col))
         p.append(a)
p=np.asarray(p)