Update app.py

app.py

@@ -19,11 +19,12 @@ def run_manim(source_code, main_class):
         f.write(source_code)
     
     # Run the manim command
+    print("Prepare to run", flush=True)
     command = f"manim render -ql -o {output_file_name} --media_dir {MANIM_OUT_FOLDER} {input_file_path} {main_class}"
     result = subprocess.run(command, shell=True, check=True, capture_output=True, text=True)
-    print("Return code:", result.returncode)
-    print("Output:", result.stdout)
-    print("Error:", result.stderr)
+    print("Return code:", result.returncode, flush=True)
+    print("Output:", result.stdout, flush=True)
+    print("Error:", result.stderr, flush=True)
     
     # Return the output video file path
     return output_file_path