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+# FROM python:3.9
+FROM tiangolo/uwsgi-nginx:python3.9
+
+WORKDIR /code
+RUN chmod 777 /code
+
+RUN useradd -m -u 1000 user
+USER user
+ENV HOME=/home/user \
+	PATH=/home/user/.local/bin:$PATH
+WORKDIR $HOME
+
+RUN git clone https://github.com/hazyresearch/meerkat.git
+WORKDIR $HOME/meerkat/
+RUN git checkout karan/deploy
+RUN pip install --upgrade .
+
+# PUT THIS BACK
+# RUN pip install meerkat-ml
+
+COPY --chown=user . $HOME/
+
+# Set env variables
+RUN mkdir $HOME/logs
+RUN chmod 777 $HOME/logs
+ENV MEERKAT_LOG_DIR=$HOME/logs
+RUN chmod 777 $HOME/
+ENV MEERKAT_CONFIG=$HOME/config.yaml
+ENV SPACE_AUTHOR_NAME=krandiash
+ENV SPACE_REPO_NAME=test-nginx-1
+
+COPY --chown=user ./tutorial-reactive-viewer.py $HOME/tutorial-reactive-viewer.py
+
+WORKDIR $HOME
+CMD ["mk", "run", "/home/user/tutorial-reactive-viewer.py", "--host", "0.0.0.0", "--api-port", "7860"]

tutorial-reactive-viewer.py

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+"""A reactive image viewer that allows you to select a class and see 16 random
+images from that class.
+
+This is a tutorial on how to use `reactive` functions in Meerkat, to
+build complex reactive workflows.
+"""
+
+import meerkat as mk
+
+df = mk.get("imagenette", version="160px")
+IMAGE_COL = "img"
+LABEL_COL = "label"
+
+
+@mk.reactive()
+def random_images(df: mk.DataFrame):
+    images = df.sample(16)[IMAGE_COL]
+    formatter = images.formatters["base"]
+    # formatter = images.formatters['tiny']
+    return [formatter.encode(img) for img in images]
+
+
+labels = list(df[LABEL_COL].unique())
+class_selector = mk.gui.Select(
+    values=list(labels),
+    value=labels[0],
+)
+
+# Note that neither of these will work:
+# filtered_df = df[df[LABEL_COL] == class_selector.value]
+#       (doesn't react to changes in class_selector.value)
+# filtered_df = mk.reactive(lambda df: df[df[LABEL_COL] == class_selector.value])(df)
+#       (doesn't react to changes in class_selector.value)
+filtered_df = mk.reactive(lambda df, label: df[df[LABEL_COL] == label])(
+    df, class_selector.value
+)
+
+images = random_images(filtered_df)
+
+# This won't work with a simple reactive fn like a random_images
+# that only has df.sample
+# as the encoding needs to be done in the reactive fn
+# grid = mk.gui.html.gridcols2([
+#   mk.gui.Image(data=images.formatters["base"].encode(img)) for img in images
+# ])
+
+grid = mk.gui.html.div(
+    [
+        # Make the image square
+        mk.gui.html.div(mk.gui.Image(data=img))
+        for img in images
+    ],
+    classes="h-fit grid grid-cols-4 gap-1",
+)
+
+layout = mk.gui.html.div(
+    [
+        mk.gui.html.div(
+            [mk.gui.Caption("Choose a class:"), class_selector],
+            classes="flex justify-center items-center mb-2 gap-2",
+        ),
+        grid,
+    ],
+    classes="h-full flex flex-col m-2",
+)
+
+page = mk.gui.Page(layout, id="reactive-viewer")
+page.launch()