Merge branch 'main' into handle-stream-cancel-error

README.md

@@ -36,6 +36,7 @@ This repository hosts the code of LightRAG. The structure of this code is based
 </div>
 
 ## 🎉 News
+- [x] [2025.02.05]🎯📢Our team has released [VideoRAG](https://github.com/HKUDS/VideoRAG) for processing and understanding extremely long-context videos.
 - [x] [2025.01.13]🎯📢Our team has released [MiniRAG](https://github.com/HKUDS/MiniRAG) making RAG simpler with small models.
 - [x] [2025.01.06]🎯📢You can now [use PostgreSQL for Storage](#using-postgresql-for-storage).
 - [x] [2024.12.31]🎯📢LightRAG now supports [deletion by document ID](https://github.com/HKUDS/LightRAG?tab=readme-ov-file#delete).
@@ -1058,6 +1059,12 @@ LightRag can be installed with API support to serve a Fast api interface to perf
 
 The documentation can be found [here](lightrag/api/README.md)
 
+## Graph viewer
+LightRag can be installed with Tools support to add extra tools like the graphml 3d visualizer.
+
+The documentation can be found [here](lightrag/tools/lightrag_visualizer/README.md)
+
+
 ## Star History
 
 <a href="https://star-history.com/#HKUDS/LightRAG&Date">

lightrag/__init__.py

@@ -1,5 +1,5 @@
 from .lightrag import LightRAG as LightRAG, QueryParam as QueryParam
 
-__version__ = "1.1.4"
+__version__ = "1.1.5"
 __author__ = "Zirui Guo"
 __url__ = "https://github.com/HKUDS/LightRAG"

lightrag/api/__init__.py

@@ -1 +1 @@
-__api_version__ = "1.0.3"
+__api_version__ = "1.0.4"

lightrag/api/lightrag_server.py

@@ -557,7 +557,14 @@ class DocumentManager:
     def __init__(
         self,
         input_dir: str,
-        supported_extensions: tuple = (".txt", ".md", ".pdf", ".docx", ".pptx", "xlsx"),
+        supported_extensions: tuple = (
+            ".txt",
+            ".md",
+            ".pdf",
+            ".docx",
+            ".pptx",
+            ".xlsx",
+        ),
     ):
         self.input_dir = Path(input_dir)
         self.supported_extensions = supported_extensions

lightrag/kg/mongo_impl.py

@@ -2,11 +2,14 @@ import os
 from tqdm.asyncio import tqdm as tqdm_async
 from dataclasses import dataclass
 import pipmaster as pm
-import np
+import numpy as np
 
 if not pm.is_installed("pymongo"):
     pm.install("pymongo")
 
+if not pm.is_installed("motor"):
+    pm.install("motor")
+
 from pymongo import MongoClient
 from motor.motor_asyncio import AsyncIOMotorClient
 from typing import Union, List, Tuple

lightrag/kg/postgres_impl.py

@@ -447,7 +447,7 @@ class PGDocStatusStorage(DocStatusStorage):
         sql = "select * from LIGHTRAG_DOC_STATUS where workspace=$1 and id=$2"
         params = {"workspace": self.db.workspace, "id": id}
         result = await self.db.query(sql, params, True)
-        if result is None:
+        if result is None or result == []:
             return None
         else:
             return DocProcessingStatus(

lightrag/lightrag.py

@@ -372,12 +372,23 @@ class LightRAG:
 
         # 3. Filter out already processed documents
         # _add_doc_keys = await self.doc_status.filter_keys(list(new_docs.keys()))
-        _add_doc_keys = {
-            doc_id
-            for doc_id in new_docs.keys()
-            if (current_doc := await self.doc_status.get_by_id(doc_id)) is None
-            or current_doc.status == DocStatus.FAILED
-        }
+        _add_doc_keys = set()
+        for doc_id in new_docs.keys():
+            current_doc = await self.doc_status.get_by_id(doc_id)
+
+            if current_doc is None:
+                _add_doc_keys.add(doc_id)
+                continue  # skip to the next doc_id
+
+            status = None
+            if isinstance(current_doc, dict):
+                status = current_doc["status"]
+            else:
+                status = current_doc.status
+
+            if status == DocStatus.FAILED:
+                _add_doc_keys.add(doc_id)
+
         new_docs = {k: v for k, v in new_docs.items() if k in _add_doc_keys}
 
         if not new_docs:

{extra/VisualizationTool → lightrag/tools/lightrag_visualizer}/README-zh.md

@@ -38,8 +38,8 @@
 
 1. **启动程序**:
    ```bash
-   python -m pip install -r requirements.txt
-   python graph_visualizer.py
+   pip install lightrag-hku[tools]
+   lightrag-viewer
    ```
 
 2. **加载字体**:

{extra/VisualizationTool → lightrag/tools/lightrag_visualizer}/README.md

@@ -1,6 +1,22 @@
-# 3D GraphML Viewer
+# LightRAG 3D Graph Viewer
 
-An interactive 3D graph visualization tool based on Dear ImGui and ModernGL.
+An interactive 3D graph visualization tool included in the LightRAG package for visualizing and analyzing RAG (Retrieval-Augmented Generation) graphs and other graph structures.
+
+![image](https://github.com/user-attachments/assets/b0d86184-99fc-468c-96ed-c611f14292bf)
+
+## Installation
+
+### Quick Install
+```bash
+pip install lightrag-hku[tools]  # Install with visualization tool only
+# or
+pip install lightrag-hku[api,tools]  # Install with both API and visualization tools
+```
+
+## Launch the Viewer
+```bash
+lightrag-viewer
+```
 
 ## Features
 
@@ -27,44 +43,32 @@ An interactive 3D graph visualization tool based on Dear ImGui and ModernGL.
 - **NumPy**: Numerical computations
 - **community**: Community detection
 
-## Usage
+## Interactive Controls
 
-1. **Launch the Program**:
-   ```bash
-   python -m pip install -r requirements.txt
-   python graph_visualizer.py
-   ```
+### Camera Movement
+- W: Move forward
+- S: Move backward
+- A: Move left
+- D: Move right
+- Q: Move up
+- E: Move down
+
+### View Control
+- Hold right mouse button and drag to rotate view
+
+### Node Interaction
+- Hover mouse to highlight nodes
+- Click to select nodes
+
+## Visualization Settings
 
-2. **Load Font**:
-   - Place the font file `font.ttf` in the `assets` directory
-   - Or modify the `CUSTOM_FONT` constant to use a different font file
-
-3. **Load Graph File**:
-   - Click the "Load GraphML" button in the interface
-   - Select a graph file in GraphML format
-
-4. **Interactive Controls**:
-   - **Camera Movement**:
-     - W: Move forward
-     - S: Move backward
-     - A: Move left
-     - D: Move right
-     - Q: Move up
-     - E: Move down
-   - **View Control**:
-     - Hold right mouse button and drag to rotate view
-   - **Node Interaction**:
-     - Hover mouse to highlight nodes
-     - Click to select nodes
-
-5. **Visualization Settings**:
-   - Adjustable via UI control panel:
-     - Layout type
-     - Node size
-     - Edge width
-     - Label visibility
-     - Label size
-     - Background color
+Adjustable via UI control panel:
+- Layout type
+- Node size
+- Edge width
+- Label visibility
+- Label size
+- Background color
 
 ## Customization Options
 
@@ -75,14 +79,58 @@ An interactive 3D graph visualization tool based on Dear ImGui and ModernGL.
 - **Label Color**: Set label color through `label_color`
 - **View Distance**: Control maximum label display distance with `label_culling_distance`
 
+## System Requirements
+
+- Python 3.9+
+- Graphics card with OpenGL 3.3+ support
+- Supported Operating Systems: Windows/Linux/MacOS
+
+## Troubleshooting
+
+### Common Issues
+
+1. **Command Not Found**
+   ```bash
+   # Make sure you installed with the 'tools' option
+   pip install lightrag-hku[tools]
+
+   # Verify installation
+   pip list | grep lightrag-hku
+   ```
+
+2. **ModernGL Initialization Failed**
+   ```bash
+   # Check OpenGL version
+   glxinfo | grep "OpenGL version"
+
+   # Update graphics drivers if needed
+   ```
+
+3. **Font Loading Issues**
+   - The required fonts are included in the package
+   - If issues persist, check your graphics drivers
+
+## Usage with LightRAG
+
+The viewer is particularly useful for:
+- Visualizing RAG knowledge graphs
+- Analyzing document relationships
+- Exploring semantic connections
+- Debugging retrieval patterns
+
 ## Performance Optimizations
 
 - Efficient graphics rendering using ModernGL
 - View distance culling for label display optimization
 - Community detection algorithms for optimized visualization of large-scale graphs
 
-## System Requirements
+## Support
 
-- Python 3.10+
-- Graphics card with OpenGL 3.3+ support
-- Supported Operating Systems: Windows/Linux/MacOS
+- GitHub Issues: [LightRAG Repository](https://github.com/HKUDS/LightRAG)
+- Documentation: [LightRAG Docs](https://URL-to-docs)
+
+## License
+
+This tool is part of LightRAG and is distributed under the MIT License. See `LICENSE` for more information.
+
+Note: This visualization tool is an optional component of the LightRAG package. Install with the [tools] option to access the viewer functionality.

lightrag/tools/lightrag_visualizer/assets/Geist-Regular.ttf

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1462ccd6f9b8ddf05af952cd66789ac74f29727f0177584163fcd8b177462e5c
+size 111644

lightrag/tools/lightrag_visualizer/assets/LICENSE - Geist.txt

@@ -0,0 +1,92 @@
+Copyright (c) 2023 Vercel, in collaboration with basement.studio
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION AND CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

lightrag/tools/lightrag_visualizer/assets/LICENSE - SmileySans.txt

@@ -0,0 +1,93 @@
+Copyright (c) 2022--2024, atelierAnchor <https://atelier-anchor.com>,
+with Reserved Font Name <Smiley> and <得意黑>.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

lightrag/tools/lightrag_visualizer/assets/SmileySans-Oblique.ttf

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b447d7e781f08bc95c4c9f23ba71ed2b8ebb639aa7184485c71c4ca5afcd25c4
+size 2629764

{extra/VisualizationTool → lightrag/tools/lightrag_visualizer}/graph_visualizer.py

@@ -1,6 +1,6 @@
 """
 3D GraphML Viewer using Dear ImGui and ModernGL
-Author: LoLLMs, ArnoChen
+Author: ParisNeo, ArnoChen
 Description: An interactive 3D GraphML viewer using imgui_bundle and ModernGL
 Version: 2.0
 """
@@ -8,6 +8,18 @@ Version: 2.0
 from typing import Optional, Tuple, Dict, List
 import numpy as np
 import networkx as nx
+import pipmaster as pm
+
+# Added automatic libraries install using pipmaster
+if not pm.is_installed("moderngl"):
+    pm.install("moderngl")
+if not pm.is_installed("imgui_bundle"):
+    pm.install("imgui_bundle")
+if not pm.is_installed("pyglm"):
+    pm.install("pyglm")
+if not pm.is_installed("python-louvain"):
+    pm.install("python-louvain")
+
 import moderngl
 from imgui_bundle import imgui, immapp, hello_imgui
 import community
@@ -20,6 +32,9 @@ import os
 
 CUSTOM_FONT = "font.ttf"
 
+DEFAULT_FONT_ENG = "Geist-Regular.ttf"
+DEFAULT_FONT_CHI = "SmileySans-Oblique.ttf"
+
 
 class Node3D:
     """Class representing a 3D node in the graph"""
@@ -172,6 +187,10 @@ class GraphViewer:
                     np.sin(np.radians(self.pitch)),
                 )
             )
+
+        if not imgui.is_window_hovered():
+            return
+
         if io.mouse_wheel != 0:
             self.move_speed += io.mouse_wheel * 0.05
             self.move_speed = np.max([self.move_speed, 0.01])
@@ -502,6 +521,14 @@ class GraphViewer:
     def load_file(self, filepath: str):
         """Load a GraphML file with error handling"""
         try:
+            # Clear existing data
+            self.id_node_map.clear()
+            self.nodes.clear()
+            self.selected_node = None
+            self.highlighted_node = None
+            self.setup_buffers()
+
+            # Load new graph
             self.graph = nx.read_graphml(filepath)
             self.calculate_layout()
             self.update_buffers()
@@ -672,10 +699,6 @@ class GraphViewer:
             self.position, self.position + self.front, self.up
         )
 
-        io = imgui.get_io()
-        self.window_width = int(io.display_size.x)
-        self.window_height = int(io.display_size.y)
-
         aspect_ratio = self.window_width / self.window_height
         self.proj_matrix = glm.perspective(
             glm.radians(60.0),  # FOV
@@ -839,7 +862,7 @@ class GraphViewer:
     def render(self):
         """Render the graph"""
         # Clear screen
-        self.glctx.clear(*self.background_color)
+        self.glctx.clear(*self.background_color, depth=1)
 
         if not self.graph:
             return
@@ -886,11 +909,15 @@ class GraphViewer:
         # Render id map
         self.render_id_map(mvp)
 
+    def render_labels(self):
         # Render labels if enabled
-        if self.show_labels:
+        if self.show_labels and self.nodes:
             # Save current font scale
             original_scale = imgui.get_font_size()
 
+            self.update_view_proj_matrix()
+            mvp = self.proj_matrix * self.view_matrix
+
             for node in self.nodes:
                 # Project node position to screen space
                 pos = mvp * glm.vec4(
@@ -1013,13 +1040,39 @@ def create_sphere(sectors: int = 32, rings: int = 16) -> Tuple:
     return (vbo_vertices, vbo_elements)
 
 
+def draw_text_with_bg(
+    text: str,
+    text_pos: imgui.ImVec2Like,
+    text_size: imgui.ImVec2Like,
+    bg_color: int,
+):
+    imgui.get_window_draw_list().add_rect_filled(
+        (text_pos[0] - 5, text_pos[1] - 5),
+        (text_pos[0] + text_size[0] + 5, text_pos[1] + text_size[1] + 5),
+        bg_color,
+        3.0,
+    )
+    imgui.set_cursor_pos(text_pos)
+    imgui.text(text)
+
+
 def main():
     """Main application entry point"""
     viewer = GraphViewer()
 
+    show_fps = True
+    text_bg_color = imgui.IM_COL32(0, 0, 0, 100)
+
     def gui():
         if not viewer.initialized:
             viewer.setup()
+            # # Change the theme
+            # tweaked_theme = hello_imgui.get_runner_params().imgui_window_params.tweaked_theme
+            # tweaked_theme.theme = hello_imgui.ImGuiTheme_.darcula_darker
+            # hello_imgui.apply_tweaked_theme(tweaked_theme)
+
+        viewer.window_width = int(imgui.get_window_width())
+        viewer.window_height = int(imgui.get_window_height())
 
         # Handle keyboard and mouse input
         viewer.handle_keyboard_input()
@@ -1089,11 +1142,34 @@ def main():
         # Render graph settings window
         viewer.render_settings()
 
-        window_bg_color.w = 0.0
+        # Render FPS
+        if show_fps:
+            imgui.set_window_font_scale(1)
+            fps_text = f"FPS: {hello_imgui.frame_rate():.1f}"
+            text_size = imgui.calc_text_size(fps_text)
+            cursor_pos = (10, viewer.window_height - text_size.y - 10)
+            draw_text_with_bg(fps_text, cursor_pos, text_size, text_bg_color)
+
+        # Render highlighted node ID
+        if viewer.highlighted_node:
+            imgui.set_window_font_scale(1)
+            node_text = f"Node ID: {viewer.highlighted_node.label}"
+            text_size = imgui.calc_text_size(node_text)
+            cursor_pos = (
+                viewer.window_width - text_size.x - 10,
+                viewer.window_height - text_size.y - 10,
+            )
+            draw_text_with_bg(node_text, cursor_pos, text_size, text_bg_color)
+
+        window_bg_color.w = 0
         style.set_color_(imgui.Col_.window_bg.value, window_bg_color)
 
-        # Render the graph
-        viewer.render()
+        # Render labels
+        viewer.render_labels()
+
+    def custom_background():
+        if viewer.initialized:
+            viewer.render()
 
     runner_params = hello_imgui.RunnerParams()
     runner_params.app_window_params.window_geometry.size = (
@@ -1102,47 +1178,48 @@ def main():
     )
     runner_params.app_window_params.window_title = "3D GraphML Viewer"
     runner_params.callbacks.show_gui = gui
-    addons = immapp.AddOnsParams()
-    addons.with_markdown = True
+    runner_params.callbacks.custom_background = custom_background
 
     def load_font():
-        io = imgui.get_io()
-        io.fonts.add_font_default()
-
-        # Load font for Chinese character support
         # You will need to provide it yourself, or use another font.
         font_filename = CUSTOM_FONT
 
-        if not os.path.exists("assets/" + font_filename):
+        io = imgui.get_io()
+        io.fonts.tex_desired_width = 4096  # Larger texture for better CJK font quality
+        font_size_pixels = 14
+        asset_dir = os.path.join(os.path.dirname(__file__), "assets")
+
+        # Try to load custom font
+        if not os.path.isfile(font_filename):
+            font_filename = os.path.join(asset_dir, font_filename)
+        if os.path.isfile(font_filename):
+            custom_font = io.fonts.add_font_from_file_ttf(
+                filename=font_filename,
+                size_pixels=font_size_pixels,
+                glyph_ranges_as_int_list=io.fonts.get_glyph_ranges_chinese_full(),
+            )
+            io.font_default = custom_font
             return
 
-        # Get the full Chinese character range for ImGui
-        # This includes all Chinese characters supported by ImGui
-        cn_glyph_ranges_imgui = imgui.get_io().fonts.get_glyph_ranges_chinese_full()
-
-        # Set up font loading parameters with Chinese character support
-        font_loading_params = hello_imgui.FontLoadingParams()
-        font_loading_params.glyph_ranges = hello_imgui.translate_common_glyph_ranges(
-            cn_glyph_ranges_imgui
+        # Load default fonts
+        io.fonts.add_font_from_file_ttf(
+            filename=os.path.join(asset_dir, DEFAULT_FONT_ENG),
+            size_pixels=font_size_pixels,
         )
-        custom_font = hello_imgui.load_font(font_filename, 16.0, font_loading_params)
-
-        # # Merge with default font
-        # font_config = imgui.ImFontConfig()
-        # font_config.merge_mode = True
-        # custom_font = io.fonts.add_font_from_file_ttf(
-        #     filename= "assets/" + font_filename,
-        #     size_pixels=16.0,
-        #     font_cfg=font_config,
-        #     glyph_ranges_as_int_list=cn_glyph_ranges_imgui,
-        # )
 
-        io.fonts.tex_desired_width = 4096  # Larger texture for better CJK font quality
-        io.font_default = custom_font
+        font_config = imgui.ImFontConfig()
+        font_config.merge_mode = True
+
+        io.font_default = io.fonts.add_font_from_file_ttf(
+            filename=os.path.join(asset_dir, DEFAULT_FONT_CHI),
+            size_pixels=font_size_pixels,
+            font_cfg=font_config,
+            glyph_ranges_as_int_list=io.fonts.get_glyph_ranges_chinese_full(),
+        )
 
     runner_params.callbacks.load_additional_fonts = load_font
 
-    immapp.run(runner_params, addons)
+    immapp.run(runner_params)
 
 
 if __name__ == "__main__":

setup.py

@@ -62,6 +62,16 @@ def read_api_requirements():
     return api_deps
 
 
+def read_extra_requirements():
+    api_deps = []
+    try:
+        with open("./lightrag/tools/lightrag_visualizer/requirements.txt") as f:
+            api_deps = [line.strip() for line in f if line.strip()]
+    except FileNotFoundError:
+        print("Warning: API requirements.txt not found.")
+    return api_deps
+
+
 metadata = retrieve_metadata()
 long_description = read_long_description()
 requirements = read_requirements()
@@ -97,10 +107,12 @@ setuptools.setup(
     },
     extras_require={
         "api": read_api_requirements(),  # API requirements as optional
+        "tools": read_extra_requirements(),  # API requirements as optional
     },
     entry_points={
         "console_scripts": [
             "lightrag-server=lightrag.api.lightrag_server:main [api]",
+            "lightrag-viewer=lightrag.tools.lightrag_visualizer.graph_visualizer:main [tools]",
         ],
     },
 )