Example workspace type for wrapping open-source library.

server/pillow_ops.py

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+'''Demo for how easily we can provide a UI for popular open-source tools.'''
+from . import ops
+from .executors import one_by_one
+from PIL import Image, ImageFilter
+import base64
+import io
+
+ENV = 'Pillow'
+op = ops.op_registration(ENV)
+one_by_one.register(ENV, cache=False)
+
+@op("Open image")
+def open_image(*, filename: str):
+  return Image.open(filename)
+
+@op("Save image")
+def save_image(image: Image, *, filename: str):
+  image.save(filename)
+
+@op("Crop")
+def crop(image: Image, *, top: int, left: int, bottom: int, right: int):
+  return image.crop((left, top, right, bottom))
+
+@op("Flip horizontally")
+def flip_horizontally(image: Image):
+  return image.transpose(Image.Transpose.FLIP_LEFT_RIGHT)
+
+@op("Flip verically")
+def flip_vertically(image: Image):
+  return image.transpose(Image.Transpose.FLIP_TOP_BOTTOM)
+
+@op("Blur")
+def blur(image: Image, *, radius: float = 5):
+  return image.filter(ImageFilter.GaussianBlur(radius))
+
+@op("Detail")
+def detail(image: Image):
+  return image.filter(ImageFilter.DETAIL)
+
+@op("Edge enhance")
+def edge_enhance(image: Image):
+  return image.filter(ImageFilter.EDGE_ENHANCE)
+
+@op("To grayscale")
+def to_grayscale(image: Image):
+  return image.convert('L')
+
+@op("View image", view="image")
+def view_image(image: Image):
+  buffered = io.BytesIO()
+  image.save(buffered, format="JPEG")
+  b64 = base64.b64encode(buffered.getvalue()).decode("utf-8")
+  data_url = 'data:image/jpeg;base64,' + b64
+  return data_url