Update app.py

app.py

@@ -128,7 +128,7 @@ with gr.Blocks(title=title, theme=gr.themes.Default(font=[gr.themes.GoogleFont("
     # greet_btn.click(fn=greet, inputs=name, outputs=output)
     gr.Label(value="Comparison of Covariance Estimators")
     #if min_slider_samples_range:
-    while !changed:
+    while not changed:
         min_slider_samples_range.change(generate_plots, inputs=[min_slider_samples_range,max_slider_samples_range], outputs= gr.Plot() )
         max_slider_samples_range.change(generate_plots, inputs=[min_slider_samples_range,max_slider_samples_range], outputs= gr.Plot() )
         changed = True