Support qt & gradio backends

app.py

@@ -1,5 +1,6 @@
 from interactive_pipe import interactive_pipeline, interactive
 from interactive_pipe import Curve, SingleCurve
+import argparse
 import numpy as np
 
 
@@ -38,27 +39,33 @@ def profile(img):
     luma = img.mean(axis=-1)
     h_profile = SingleCurve(y=luma[0, :], label="H profile")
     v_profile = SingleCurve(y=luma[:, 0], label="V profile")
-    return Curve([h_profile, v_profile], xlabel="Position", ylabel="Luminance")
+    return Curve(
+        [h_profile, v_profile],
+        xlabel="Position", ylabel="Luminance",
+        grid=True
+    )
 
 
-markdown_description = "# Code to build this app on gradio \n"
-markdown_description += "```python\n"+open(__file__, 'r').read()+"```"
-
-
-@ interactive_pipeline(
-    gui="gradio",
-    # gui="qt",
-    cache=True,
-    markdown_description=markdown_description
-)
-def simple_pipe():
+def tutorial_pipeline():
     inp = gen_color()
     out_geometry = modify_geometry(inp)
     out_bnw = change_color(inp)
     out_image = split(out_geometry, out_bnw)
     out_profile = profile(out_image)
-    return [inp, out_geometry, out_profile, out_image]
+    return [[inp, out_geometry], [out_profile, out_image]]
 
 
 if __name__ == "__main__":
-    simple_pipe()
+    BACKEND_OPTIONS = ["gradio", "qt"]
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-b", "--backend", type=str,
+                        choices=BACKEND_OPTIONS, default=BACKEND_OPTIONS[0])
+    args = parser.parse_args()
+    markdown_description = "# Source code \n"
+    markdown_description += "```python\n"+open(__file__, 'r').read()+"```"
+    playable_tutorial_pipeline = interactive_pipeline(
+        gui=args.backend,
+        cache=True,
+        markdown_description=markdown_description
+    )(tutorial_pipeline)
+    playable_tutorial_pipeline()