added Plotly materializer (#496)

Adds a plotly materializer.

Squashed commits --- 
* added plotly materializer

* added kaleido backend to requirements-test.txt

* fixed Python 3.8 typing

---------

Co-authored-by: zilto <tjean@DESKTOP-V6JDCS2.localdomain>

hamilton/function_modifiers/base.py

@@ -23,6 +23,7 @@
     plugins_modules = [
         "numpy",
         "pandas",
+        "plotly",
         "polars",
         "pyspark_pandas",
         "spark",

hamilton/plugins/plotly_extensions.py

@@ -0,0 +1,132 @@
+import dataclasses
+import pathlib
+from typing import IO, Any, Collection, Dict, List, Optional, Type, Union
+
+try:
+    import plotly.graph_objects
+except ImportError:
+    raise NotImplementedError("Plotly is not installed.")
+
+from hamilton import registry
+from hamilton.io import utils
+from hamilton.io.data_adapters import DataSaver
+
+
+@dataclasses.dataclass
+class PlotlyStaticWriter(DataSaver):
+    """Write Plotly figure as static image format
+    ref: https://plotly.com/python/static-image-export/
+    """
+
+    path: Union[str, pathlib.Path, IO]
+    format: Optional[str] = None
+    width: Optional[int] = None
+    height: Optional[int] = None
+    scale: Optional[Union[int, float]] = None
+    validate: bool = True
+    engine: str = "auto"
+
+    def _get_saving_kwargs(self) -> dict:
+        kwargs = {}
+        if self.format is not None:
+            kwargs["format"] = self.format
+        if self.width is not None:
+            kwargs["width"] = self.width
+        if self.height is not None:
+            kwargs["height"] = self.height
+        if self.scale is not None:
+            kwargs["scale"] = self.scale
+        if self.validate is not None:
+            kwargs["validate"] = self.validate
+        if self.engine is not None:
+            kwargs["engine"] = self.engine
+
+        return kwargs
+
+    def save_data(self, data: plotly.graph_objects.Figure) -> Dict[str, Any]:
+        data.write_image(file=self.path, **self._get_saving_kwargs())
+        return utils.get_file_metadata(self.path)
+
+    @classmethod
+    def applicable_types(cls) -> Collection[Type]:
+        return [plotly.graph_objects.Figure]
+
+    @classmethod
+    def name(cls) -> str:
+        return "plotly"
+
+
+@dataclasses.dataclass
+class PlotlyInteractiveWriter(DataSaver):
+    """Write Plotly figure as interactive HTML + JS
+    ref: https://plotly.com/python/interactive-html-export/
+    """
+
+    path: Union[str, pathlib.Path, IO]
+    config: Optional[Dict] = None
+    auto_play: bool = True
+    include_plotlyjs: Union[
+        bool, str
+    ] = True  # or "cdn", "directory", "require", "False", "other string .js"
+    include_mathjax: Union[bool, str] = False  # "cdn", "string .js"
+    post_script: Union[str, List[str], None] = None
+    full_html: bool = True
+    animation_opts: Optional[Dict] = None
+    default_width: Union[int, float, str] = "100%"
+    default_height: Union[int, float, str] = "100%"
+    validate: bool = True
+    auto_open: bool = True
+    div_id: Optional[str] = None
+
+    def _get_saving_kwargs(self) -> dict:
+        kwargs = {}
+        if self.config is not None:
+            kwargs["config"] = self.config
+        if self.auto_play is not None:
+            kwargs["auto_play"] = self.auto_play
+        if self.include_plotlyjs is not None:
+            kwargs["include_plotlyjs"] = self.include_plotlyjs
+        if self.include_mathjax is not None:
+            kwargs["include_mathjax"] = self.include_mathjax
+        if self.post_script is not None:
+            kwargs["post_script"] = self.post_script
+        if self.full_html is not None:
+            kwargs["full_html"] = self.full_html
+        if self.animation_opts is not None:
+            kwargs["animation_opts"] = self.animation_opts
+        if self.default_width is not None:
+            kwargs["default_width"] = self.default_width
+        if self.default_height is not None:
+            kwargs["default_height"] = self.default_height
+        if self.validate is not None:
+            kwargs["validate"] = self.validate
+        if self.auto_open is not None:
+            kwargs["auto_open"] = self.auto_open
+        if self.div_id is not None:
+            kwargs["div_id"] = self.div_id
+        return kwargs
+
+    def save_data(self, data: plotly.graph_objects.Figure) -> Dict[str, Any]:
+        data.write_html(file=self.path, **self._get_saving_kwargs())
+        return utils.get_file_metadata(self.path)
+
+    @classmethod
+    def applicable_types(cls) -> Collection[Type]:
+        return [plotly.graph_objects.Figure]
+
+    @classmethod
+    def name(cls) -> str:
+        return "html"
+
+
+def register_data_loaders():
+    for loader in [
+        PlotlyStaticWriter,
+        PlotlyInteractiveWriter,
+    ]:
+        registry.register_adapter(loader)
+
+
+register_data_loaders()
+
+COLUMN_FRIENDLY_DF_TYPE = False

requirements-test.txt

@@ -1,10 +1,12 @@
 fsspec
 graphviz
+kaleido
 lightgbm
 lxml
 lz4
 matplotlib
 networkx
+plotly
 polars
 pyarrow
 pytest

tests/plugins/test_plotly_extensions.py

@@ -0,0 +1,31 @@
+import pathlib
+
+import plotly.graph_objects as go
+import pytest
+
+from hamilton.plugins.plotly_extensions import PlotlyInteractiveWriter, PlotlyStaticWriter
+
+
+@pytest.fixture
+def figure():
+    yield go.Figure(data=go.Scatter(x=[1, 2, 3, 4, 5], y=[10, 14, 18, 24, 30], mode="markers"))
+
+
+def test_plotly_static_writer(figure: go.Figure, tmp_path: pathlib.Path) -> None:
+    file_path = tmp_path / "figure.png"
+
+    writer = PlotlyStaticWriter(path=file_path)
+    metadata = writer.save_data(figure)
+
+    assert file_path.exists()
+    assert metadata["path"] == file_path
+
+
+def test_plotly_interactive_writer(figure: go.Figure, tmp_path: pathlib.Path) -> None:
+    file_path = tmp_path / "figure.html"
+
+    writer = PlotlyInteractiveWriter(path=file_path)
+    metadata = writer.save_data(figure)
+
+    assert file_path.exists()
+    assert metadata["path"] == file_path