Update app.py

app.py

@@ -38,7 +38,7 @@ def generate_an_image_from_text(text, text_size_, width, lenght):
     # Create a drawing object
     draw = ImageDraw.Draw(image)
     # font def 
-    font_dir = ''
+    dir_path = ''
     # Get a list of all the font files in the directory
     print("start generation")
     font_files = glob.glob(os.path.join(dir_path, 'fonts', '*.ttf'))