fix error message

tgbot/shit/render.py

@@ -69,18 +69,21 @@ def render_text_on_image(input_image_path, text_to_draw, output_image_path=None,
 WIDTH = 29
 HEIGHT = 10
 
+EMPTY_DOT = "◌"
+FILLED_DOT = "●"
+
 
 def image_to_string(image_file):
     img = Image.open(image_file)
 
-    img = img.resize((WIDTH, HEIGHT), Image.Resampling.NEAREST)
+    img = img.resize((WIDTH, HEIGHT), Image.Resampling.LANCZOS)
 
     img = img.convert("1")
 
     # Get image dimensions
     width, height = img.size
     if width != WIDTH or height != HEIGHT:
-        raise ValueError("The image must be exactly 22x9 pixels.")
+        raise ValueError(f"The image must be exactly {WIDTH}x{HEIGHT} pixels.")
 
     # Create the string representation
     pixel_string = ""
@@ -89,9 +92,9 @@ def image_to_string(image_file):
             # Get the pixel value (0 for black, 255 for white)
             pixel = img.getpixel((x, y))
             if pixel == 0:  # Black pixel
-                pixel_string += "◌"
+                pixel_string += EMPTY_DOT
             else:  # White pixel
-                pixel_string += "●"
+                pixel_string += FILLED_DOT
         pixel_string += " "  # New line for each row
 
     return pixel_string