derp.tobytes()

Author: andrewgiessel

folium/utilities.py

@@ -308,6 +308,8 @@ def write_png(array):
         array = array.astype('uint8')
     array = np.squeeze(array)
     width, height = array.shape[:2]
+
+    array = array.tobytes()
 
     # reverse the vertical line order and add null bytes at the start
     width_byte_4 = width * 4