{ "cells": [ { "cell_type": "code", "execution_count": 1, "metadata": {}, "outputs": [ { "name": "stderr", "output_type": "stream", "text": [ "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_csv from `anndata` is deprecated. Import anndata.io.read_csv instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_text from `anndata` is deprecated. Import anndata.io.read_text instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_excel from `anndata` is deprecated. Import anndata.io.read_excel instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_mtx from `anndata` is deprecated. Import anndata.io.read_mtx instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_loom from `anndata` is deprecated. Import anndata.io.read_loom instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_hdf from `anndata` is deprecated. Import anndata.io.read_hdf instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_csv from `anndata` is deprecated. Import anndata.io.read_csv instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_excel from `anndata` is deprecated. Import anndata.io.read_excel instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_hdf from `anndata` is deprecated. Import anndata.io.read_hdf instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_loom from `anndata` is deprecated. Import anndata.io.read_loom instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_mtx from `anndata` is deprecated. Import anndata.io.read_mtx instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_text from `anndata` is deprecated. Import anndata.io.read_text instead.\n", " warnings.warn(msg, FutureWarning)\n", "/Users/timkempchen/mambaforge/envs/spacec/lib/python3.10/site-packages/anndata/utils.py:429: FutureWarning: Importing read_umi_tools from `anndata` is deprecated. Import anndata.io.read_umi_tools instead.\n", " warnings.warn(msg, FutureWarning)\n", "2024-11-17 21:37:06.807506: I tensorflow/core/platform/cpu_feature_guard.cc:193] This TensorFlow binary is optimized with oneAPI Deep Neural Network Library (oneDNN) to use the following CPU instructions in performance-critical operations: SSE4.1 SSE4.2\n", "To enable them in other operations, rebuild TensorFlow with the appropriate compiler flags.\n", "INFO:root: * TissUUmaps version: 3.1.1.6\n" ] } ], "source": [ "import panel as pn\n", "import scanpy as sc\n", "import spacec as sp\n", "import matplotlib.pyplot as plt\n", "import pandas as pd\n", "import warnings\n", "from pyFlowSOM import map_data_to_nodes, som\n", "import os" ] }, { "cell_type": "code", "execution_count": 2, "metadata": {}, "outputs": [], "source": [ "def launch_interactive_clustering():\n", " warnings.filterwarnings('ignore')\n", " pn.extension('deckgl', design='bootstrap', theme='default', template='bootstrap')\n", " pn.state.template.config.raw_css.append(\"\"\"\n", " #main {\n", " padding: 0;\n", " }\"\"\")\n", "\n", " # Define the app\n", " def create_clustering_app():\n", " \n", " # Define the clustering function\n", " def clustering(\n", " adata,\n", " clustering=\"leiden\",\n", " marker_list=None,\n", " resolution=1,\n", " n_neighbors=10,\n", " reclustering=False,\n", " key_added=None,\n", " key_filter=None,\n", " subset_cluster=None,\n", " seed=42,\n", " fs_xdim=10,\n", " fs_ydim=10,\n", " fs_rlen=10, # FlowSOM parameters\n", " **cluster_kwargs,\n", " ):\n", " \"\"\"\n", " Perform clustering on the given annotated data matrix.\n", "\n", " Parameters\n", " ----------\n", " adata : AnnData\n", " The annotated data matrix of shape n_obs x n_vars.\n", " clustering : str, optional\n", " The clustering algorithm to use. Defaults to \"leiden\".\n", " marker_list : list, optional\n", " A list of markers for clustering. Defaults to None.\n", " resolution : int, optional\n", " The resolution for the clustering algorithm. Defaults to 1.\n", " n_neighbors : int, optional\n", " The number of neighbors to use for the neighbors graph. Defaults to 10.\n", " reclustering : bool, optional\n", " Whether to recluster the data. Defaults to False.\n", " key_added : str, optional\n", " The key name to add to the adata object. Defaults to None.\n", " seed : int, optional\n", " Seed for random state. Default is 42.\n", " fs_xdim : int, optional\n", " X dimension for FlowSOM. Default is 10.\n", " fs_ydim : int, optional\n", " Y dimension for FlowSOM. Default is 10.\n", " fs_rlen : int, optional\n", " Rlen for FlowSOM. Default is 10.\n", "\n", " Returns\n", " -------\n", " AnnData\n", " The annotated data matrix with the clustering results added.\n", " \"\"\"\n", " if clustering not in [\"leiden\", \"louvain\", \"leiden_gpu\", \"flowSOM\"]:\n", " print(\n", " \"Invalid clustering options. Please select from leiden, louvain, leiden_gpu, or flowSOM!\"\n", " )\n", " sys.exit()\n", "\n", " if key_added is None:\n", " key_added = clustering + \"_\" + str(resolution)\n", "\n", " if marker_list is not None:\n", " if len(list(set(marker_list) - set(adata.var_names))) > 0:\n", " print(\"Marker list not all in adata var_names! Using intersection instead!\")\n", " marker_list = list(set(marker_list) & set(adata.var_names))\n", " print(\"New marker_list: \" + \" \".join(marker_list))\n", " adata = adata[:, marker_list]\n", "\n", " if not reclustering and clustering != \"flowSOM\":\n", " sc.pp.neighbors(adata, n_neighbors=n_neighbors)\n", " sc.tl.umap(adata)\n", "\n", " if clustering == \"leiden\":\n", " sc.tl.leiden(\n", " adata,\n", " resolution=resolution,\n", " key_added=key_added,\n", " random_state=seed,\n", " **cluster_kwargs,\n", " )\n", " elif clustering == \"louvain\":\n", " sc.tl.louvain(\n", " adata,\n", " resolution=resolution,\n", " key_added=key_added,\n", " random_state=seed,\n", " **cluster_kwargs,\n", " )\n", " elif clustering == \"flowSOM\":\n", " # Implement FlowSOM clustering\n", " adata_df = pd.DataFrame(\n", " adata.X, index=adata.obs.index, columns=adata.var.index\n", " )\n", " som_input_arr = adata_df.to_numpy()\n", " node_output = som(\n", " som_input_arr,\n", " xdim=fs_xdim,\n", " ydim=fs_ydim,\n", " rlen=fs_rlen,\n", " seed=seed,\n", " )\n", " clusters, dists = map_data_to_nodes(node_output, som_input_arr)\n", " clusters = pd.Categorical(clusters)\n", " adata.obs[key_added] = clusters\n", " else:\n", " print(\"Clustering method not implemented in this example.\")\n", "\n", " return adata\n", " \n", " # Callback to load data\n", " def load_data(event):\n", " if not input_path.value or not os.path.isfile(input_path.value):\n", " output_area.object = \"**Please enter a valid AnnData file path.**\"\n", " return\n", " adata = sc.read_h5ad(input_path.value)\n", " adata_container['adata'] = adata\n", " marker_list_input.options = list(adata.var_names)\n", " output_area.object = \"**AnnData file loaded successfully.**\"\n", "\n", " # Callback to run clustering\n", " def run_clustering(event):\n", " adata = adata_container.get('adata', None)\n", " if adata is None:\n", " output_area.object = \"**Please load an AnnData file first.**\"\n", " return\n", " marker_list = list(marker_list_input.value) if marker_list_input.value else None\n", " key_added = key_added_input.value if key_added_input.value else clustering_method.value + '_' + str(resolution.value)\n", " # Start loading indicator\n", " loading_indicator.active = True\n", " output_area.object = \"**Clustering in progress...**\"\n", " # Run clustering\n", " try:\n", " if clustering_method.value == 'flowSOM':\n", " adata = clustering(\n", " adata,\n", " clustering=clustering_method.value,\n", " marker_list=marker_list,\n", " reclustering=reclustering.value,\n", " seed=seed.value,\n", " key_added=key_added,\n", " fs_xdim=fs_xdim.value,\n", " fs_ydim=fs_ydim.value,\n", " fs_rlen=fs_rlen.value\n", " )\n", " else:\n", " adata = clustering(\n", " adata,\n", " clustering=clustering_method.value,\n", " marker_list=marker_list,\n", " resolution=resolution.value,\n", " n_neighbors=n_neighbors.value,\n", " reclustering=reclustering.value,\n", " seed=seed.value,\n", " key_added=key_added\n", " )\n", " adata_container['adata'] = adata\n", " output_area.object = \"**Clustering completed.**\"\n", " # Automatically generate visualization\n", " key_to_visualize = key_added\n", " tabs = []\n", " sc.pl.umap(adata, color=[key_to_visualize], show=False)\n", " umap_fig = plt.gcf()\n", " plt.close()\n", " tabs.append(('UMAP', pn.pane.Matplotlib(umap_fig, dpi=100)))\n", " if marker_list:\n", " sc.pl.dotplot(adata, marker_list, groupby=key_to_visualize, dendrogram=True, show=False)\n", " dotplot_fig = plt.gcf()\n", " plt.close()\n", " tabs.append(('Dotplot', pn.pane.Matplotlib(dotplot_fig, dpi=100)))\n", " # Generate histogram plot\n", " cluster_counts = adata.obs[key_to_visualize].value_counts()\n", " cluster_counts.sort_index(inplace=True)\n", " cluster_counts.plot(kind='bar')\n", " plt.xlabel('Cluster')\n", " plt.ylabel('Number of Cells')\n", " plt.title(f'Cluster Counts for {key_to_visualize}')\n", " hist_fig = plt.gcf()\n", " plt.close()\n", " tabs.append(('Histogram', pn.pane.Matplotlib(hist_fig, dpi=100)))\n", " # Add new tabs to visualization area\n", " for name, pane in tabs:\n", " visualization_area.append((name, pane))\n", " # Update cluster annotations\n", " clusters = adata.obs[key_to_visualize].unique().astype(str)\n", " annotations_df = pd.DataFrame({'Cluster': clusters, 'Annotation': ['']*len(clusters)})\n", " cluster_annotation.value = annotations_df\n", " except Exception as e:\n", " output_area.object = f\"**Error during clustering: {e}**\"\n", " finally:\n", " # Stop loading indicator\n", " loading_indicator.active = False\n", "\n", " # Callback to run subclustering\n", " def run_subclustering(event):\n", " adata = adata_container.get('adata', None)\n", " if adata is None:\n", " output_area.object = \"**Please run clustering first.**\"\n", " return\n", " if not subcluster_key.value or not subcluster_values.value:\n", " output_area.object = \"**Please provide subcluster key and values.**\"\n", " return\n", " clusters = [c.strip() for c in subcluster_values.value.split(',')]\n", " key_added = subcluster_key.value + '_subcluster'\n", " # Start loading indicator for subclustering\n", " loading_indicator_subcluster.active = True\n", " output_area.object = \"**Subclustering in progress...**\"\n", " try:\n", " sc.tl.leiden(\n", " adata,\n", " seed=seed.value,\n", " restrict_to=(subcluster_key.value, clusters),\n", " resolution=subcluster_resolution.value,\n", " key_added=key_added\n", " )\n", " adata_container['adata'] = adata\n", " output_area.object = \"**Subclustering completed.**\"\n", " # Update visualization\n", " tabs = []\n", " sc.pl.umap(adata, color=[key_added], show=False)\n", " umap_fig = plt.gcf()\n", " plt.close()\n", " tabs.append(('UMAP_Sub', pn.pane.Matplotlib(umap_fig, dpi=100)))\n", " marker_list = list(marker_list_input.value) if marker_list_input.value else None\n", " if marker_list:\n", " sc.pl.dotplot(adata, marker_list, groupby=key_added, dendrogram=True, show=False)\n", " dotplot_fig = plt.gcf()\n", " plt.close()\n", " tabs.append(('Dotplot_Sub', pn.pane.Matplotlib(dotplot_fig, dpi=100)))\n", " # Generate histogram plot\n", " cluster_counts = adata.obs[key_added].value_counts()\n", " cluster_counts.sort_index(inplace=True)\n", " cluster_counts.plot(kind='bar')\n", " plt.xlabel('Subcluster')\n", " plt.ylabel('Number of Cells')\n", " plt.title(f'Subcluster Counts for {key_added}')\n", " hist_fig = plt.gcf()\n", " plt.close()\n", " tabs.append(('Histogram_Sub', pn.pane.Matplotlib(hist_fig, dpi=100)))\n", " # Add new tabs to visualization area\n", " for name, pane in tabs:\n", " visualization_area.append((name, pane))\n", " # Update cluster annotations\n", " clusters = adata.obs[key_added].unique().astype(str)\n", " annotations_df = pd.DataFrame({'Cluster': clusters, 'Annotation': ['']*len(clusters)})\n", " cluster_annotation.value = annotations_df\n", " except Exception as e:\n", " output_area.object = f\"**Error during subclustering: {e}**\"\n", " finally:\n", " # Stop loading indicator for subclustering\n", " loading_indicator_subcluster.active = False\n", "\n", " # Callback to save annotations\n", " def save_annotations(event):\n", " adata = adata_container.get('adata', None)\n", " if adata is None:\n", " output_area.object = \"**No AnnData object to annotate.**\"\n", " return\n", " annotation_dict = dict(zip(cluster_annotation.value['Cluster'], cluster_annotation.value['Annotation']))\n", " key_to_annotate = key_added_input.value if key_added_input.value else clustering_method.value + '_' + str(resolution.value)\n", " adata.obs['cell_type'] = adata.obs[key_to_annotate].astype(str).map(annotation_dict).astype('category')\n", " output_area.object = \"**Annotations saved to AnnData object.**\"\n", "\n", " def save_adata(event):\n", " adata = adata_container.get('adata', None)\n", " if adata is None:\n", " output_area.object = \"**No AnnData object to save.**\"\n", " return\n", " if not output_dir.value:\n", " output_area.object = \"**Please specify an output directory.**\"\n", " return\n", " os.makedirs(output_dir.value, exist_ok=True)\n", " output_filepath = os.path.join(output_dir.value, 'adata_annotated.h5ad')\n", " adata.write(output_filepath)\n", " output_area.object = f\"**AnnData saved to {output_filepath}.**\"\n", "\n", " # Callback to run spatial visualization\n", " def run_spatial_visualization(event):\n", " adata = adata_container.get('adata', None)\n", " if adata is None:\n", " output_area.object = \"**Please load an AnnData file first.**\"\n", " return\n", " try:\n", " sp.pl.catplot(\n", " adata, \n", " color=spatial_color.value, \n", " unique_region=spatial_unique_region.value, \n", " X=spatial_x.value, \n", " Y=spatial_y.value, \n", " n_columns=spatial_n_columns.value, \n", " palette=spatial_palette.value, \n", " savefig=spatial_savefig.value, \n", " output_fname=spatial_output_fname.value, \n", " output_dir=output_dir.value, \n", " figsize=spatial_figsize.value, \n", " size=spatial_size.value\n", " )\n", " spatial_fig = plt.gcf()\n", " plt.close()\n", " # Add new tab to visualization area\n", " visualization_area.append(('Spatial Visualization', pn.pane.Matplotlib(spatial_fig, dpi=100)))\n", " output_area.object = \"**Spatial visualization completed.**\"\n", " except Exception as e:\n", " output_area.object = f\"**Error during spatial visualization: {e}**\"\n", "\n", " # File paths\n", " input_path = pn.widgets.TextInput(name='AnnData File Path', placeholder='Enter path to .h5ad file')\n", " output_dir = pn.widgets.TextInput(name='Output Directory', placeholder='Enter output directory path')\n", " load_data_button = pn.widgets.Button(name='Load Data', button_type='primary')\n", "\n", " # Clustering parameters\n", " clustering_method = pn.widgets.Select(name='Clustering Method', options=[\"leiden\", \"louvain\", \"flowSOM\"])\n", " resolution = pn.widgets.FloatInput(name='Resolution', value=1.0)\n", " n_neighbors = pn.widgets.IntInput(name='Number of Neighbors', value=10)\n", " reclustering = pn.widgets.Checkbox(name='Reclustering', value=False)\n", " seed = pn.widgets.IntInput(name='Random Seed', value=42)\n", " key_added_input = pn.widgets.TextInput(name='Key Added', placeholder='Enter key to add to AnnData.obs', value='')\n", " marker_list_input = pn.widgets.MultiChoice(name='Marker List', options=[], width=950)\n", "\n", " # Subclustering parameters\n", " subcluster_key = pn.widgets.TextInput(name='Subcluster Key', placeholder='Enter key to filter on (e.g., \"leiden_1\")')\n", " subcluster_values = pn.widgets.TextInput(name='Subcluster Values', placeholder='Enter clusters to subset (comma-separated)')\n", " subcluster_resolution = pn.widgets.FloatInput(name='Subcluster Resolution', value=0.3)\n", " subcluster_button = pn.widgets.Button(name='Run Subclustering', button_type='primary')\n", "\n", " # Cluster annotation\n", " cluster_annotation = pn.widgets.DataFrame(pd.DataFrame(columns=['Cluster', 'Annotation']), name='Cluster Annotations', autosize_mode='fit_columns')\n", " save_annotations_button = pn.widgets.Button(name='Save Annotations', button_type='success')\n", "\n", " fs_xdim = pn.widgets.IntInput(name='FlowSOM xdim', value=10)\n", " fs_ydim = pn.widgets.IntInput(name='FlowSOM ydim', value=10)\n", " fs_rlen = pn.widgets.IntInput(name='FlowSOM rlen', value=10)\n", "\n", " # Buttons\n", " run_clustering_button = pn.widgets.Button(name='Run Clustering', button_type='primary')\n", " save_adata_button = pn.widgets.Button(name='Save AnnData', button_type='success')\n", "\n", " # Loading indicators\n", " loading_indicator = pn.widgets.Progress(name='Clustering Progress', active=False, bar_color='primary')\n", " loading_indicator_subcluster = pn.widgets.Progress(name='Subclustering Progress', active=False, bar_color='primary')\n", "\n", " # Output areas\n", " output_area = pn.pane.Markdown()\n", " visualization_area = pn.Tabs() # Changed to pn.Tabs to hold multiple plots\n", "\n", " # Global variable to hold the AnnData object\n", " adata_container = {}\n", " \n", " # Spatial visualization parameters\n", " spatial_color = pn.widgets.TextInput(name='Color By Column', placeholder='Enter group column name (e.g., cell_type_coarse)')\n", " spatial_unique_region = pn.widgets.TextInput(name='Unique Region Column', value='unique_region')\n", " spatial_x = pn.widgets.TextInput(name='X Coordinate Column', value='x')\n", " spatial_y = pn.widgets.TextInput(name='Y Coordinate Column', value='y')\n", " spatial_n_columns = pn.widgets.IntInput(name='Number of Columns', value=2)\n", " spatial_palette = pn.widgets.TextInput(name='Color Palette', value='tab20')\n", " spatial_figsize = pn.widgets.FloatInput(name='Figure Size', value=17)\n", " spatial_size = pn.widgets.FloatInput(name='Point Size', value=20)\n", " spatial_savefig = pn.widgets.Checkbox(name='Save Figure', value=False)\n", " spatial_output_fname = pn.widgets.TextInput(name='Output Filename', placeholder='Enter output filename')\n", " run_spatial_visualization_button = pn.widgets.Button(name='Run Spatial Visualization', button_type='primary')\n", "\n", " # Link callbacks\n", " load_data_button.on_click(load_data)\n", " run_clustering_button.on_click(run_clustering)\n", " subcluster_button.on_click(run_subclustering)\n", " save_annotations_button.on_click(save_annotations)\n", " save_adata_button.on_click(save_adata)\n", " run_spatial_visualization_button.on_click(run_spatial_visualization)\n", "\n", " # Clustering Tab Layout\n", " clustering_tab = pn.Column(\n", " pn.pane.Markdown(\"### Load Data\"),\n", " pn.Row(input_path, output_dir, load_data_button),\n", " pn.layout.Divider(),\n", " pn.pane.Markdown(\"### Clustering Parameters\"),\n", " pn.Row(clustering_method, resolution, n_neighbors),\n", " pn.Row(seed, reclustering),\n", " pn.Row(fs_xdim, fs_ydim, fs_rlen),\n", " key_added_input,\n", " marker_list_input,\n", " pn.layout.Divider(),\n", " pn.Row(run_clustering_button, loading_indicator),\n", " output_area\n", " )\n", "\n", " # Subclustering Tab Layout\n", " subclustering_tab = pn.Column(\n", " pn.pane.Markdown(\"### Subclustering Parameters\"),\n", " pn.Row(subcluster_key, subcluster_values, subcluster_resolution),\n", " pn.layout.Divider(),\n", " pn.Row(subcluster_button, loading_indicator_subcluster),\n", " output_area\n", " )\n", "\n", " # Annotation Tab Layout\n", " annotation_tab = pn.Column(\n", " pn.pane.Markdown(\"### Cluster Annotation\"),\n", " cluster_annotation,\n", " pn.layout.Divider(),\n", " save_annotations_button,\n", " output_area\n", " )\n", "\n", " # Save Tab Layout\n", " save_tab = pn.Column(\n", " pn.pane.Markdown(\"### Save Data\"),\n", " save_adata_button,\n", " output_area\n", " )\n", "\n", " # Spatial Visualization Tab Layout\n", " spatial_visualization_tab = pn.Column(\n", " pn.pane.Markdown(\"### Spatial Visualization Parameters\"),\n", " pn.Row(spatial_color, spatial_palette),\n", " pn.Row(spatial_unique_region, spatial_n_columns),\n", " pn.Row(spatial_x, spatial_y),\n", " pn.Row(spatial_figsize, spatial_size),\n", " pn.layout.Divider(),\n", " pn.Row(spatial_savefig, spatial_output_fname),\n", " pn.layout.Divider(),\n", " pn.Row(run_spatial_visualization_button),\n", " output_area\n", " )\n", "\n", " # Assemble Tabs\n", " tabs = pn.Tabs(\n", " (\"Clustering\", clustering_tab),\n", " (\"Subclustering\", subclustering_tab),\n", " (\"Annotation\", annotation_tab),\n", " (\"Spatial Visualization\", spatial_visualization_tab),\n", " (\"Save\", save_tab)\n", " )\n", "\n", " # Main Layout with Visualization Area\n", " main_layout = pn.Row(\n", " tabs,\n", " visualization_area,\n", " sizing_mode='stretch_both'\n", " )\n", "\n", " return main_layout\n", "\n", " # Run the app\n", " main_layout = create_clustering_app()\n", "\n", " main_layout.servable(title='SPACEc Clustering App')\n", " \n", " return main_layout" ] }, { "cell_type": "code", "execution_count": 3, "metadata": {}, "outputs": [ { "data": { "text/html": [ "" ] }, "metadata": {}, 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