[BUG] 简洁阐述问题 / langchain

[jackrous]

2025-12-22 17:24:33.640 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:33.644 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:33.644 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:33.644 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/langchain/_api/module_import.py:87: LangChainDeprecationWarning: Importing GuardrailsOutputParser from langchain.output_parsers is deprecated. Please replace the import with the following:
from langchain_community.output_parsers.rail_parser import GuardrailsOutputParser
warnings.warn(
2025-12-22 17:24:36.769 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/search_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:36.770 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/search_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:36.770 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/search_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:36.770 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:24:36.771 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui.py", line 69, in
knowledge_base_page(api=api, is_lite=is_lite)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/knowledge_base/knowledge_base.py", line 374, in knowledge_base_page
data = [
^
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/knowledge_base/knowledge_base.py", line 377, in
"id": x["id"],
~^^^^^^
TypeError: string indices must be integers, not 'str'
2025-12-22 17:24:40.463 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:40.467 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:40.467 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:40.468 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:24:40.468 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui.py", line 71, in
kb_chat(api=api)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/kb_chat.py", line 118, in kb_chat
kb_list = [x["kb_name"] for x in api.list_knowledge_bases()]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: 'NoneType' object is not iterable
2025-12-22 17:24:40.668 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:40.670 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:40.670 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:40.671 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:24:40.671 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui.py", line 71, in
kb_chat(api=api)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/kb_chat.py", line 118, in kb_chat
kb_list = [x["kb_name"] for x in api.list_knowledge_bases()]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: 'NoneType' object is not iterable
2025-12-22 17:24:42.583 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:42.587 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:42.587 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:42.588 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:24:42.776 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:42.779 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:42.779 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:24:42.780 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:25:05.405 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:05.408 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:05.408 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /tools: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:05.408 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
INFO: 127.0.0.1:32822 - "POST /chat/chat/completions HTTP/1.1" 200 OK
2025-12-22 17:25:05,877 httpx 119627 INFO HTTP Request: POST http://127.0.0.1:7861/chat/chat/completions "HTTP/1.1 200 OK"
2025-12-22 17:25:05,908 httpx 119481 INFO HTTP Request: POST http://127.0.0.1:9997/v1/chat/completions "HTTP/1.1 200 OK"
2025-12-22 17:25:25.613 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:25.615 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:25.616 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:25.616 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:25:25.616 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui.py", line 71, in
kb_chat(api=api)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/kb_chat.py", line 118, in kb_chat
kb_list = [x["kb_name"] for x in api.list_knowledge_bases()]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: 'NoneType' object is not iterable
2025-12-22 17:25:25.851 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:25.854 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:25.854 | ERROR | chatchat.webui_pages.utils:get:64 - TypeError: error when get /knowledge_base/list_knowledge_bases: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:25.854 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:25:25.855 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui.py", line 71, in
kb_chat(api=api)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/kb_chat.py", line 118, in kb_chat
kb_list = [x["kb_name"] for x in api.list_knowledge_bases()]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: 'NoneType' object is not iterable
2025-12-22 17:25:31.921 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/search_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:31.921 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/search_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:31.922 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/search_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:31.922 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:25:31.922 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui.py", line 69, in
knowledge_base_page(api=api, is_lite=is_lite)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/knowledge_base/knowledge_base.py", line 374, in knowledge_base_page
data = [
^
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/knowledge_base/knowledge_base.py", line 377, in
"id": x["id"],
~^^^^^^
TypeError: string indices must be integers, not 'str'
2025-12-22 17:25:33.007 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/delete_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:33.008 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/delete_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:33.008 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/delete_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:33.008 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:25:33.235 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/search_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:33.236 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/search_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:33.236 | ERROR | chatchat.webui_pages.utils:post:87 - TypeError: error when post /knowledge_base/search_docs: Client.init() got an unexpected keyword argument 'proxies'
2025-12-22 17:25:33.236 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 17:25:33.236 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui.py", line 69, in
knowledge_base_page(api=api, is_lite=is_lite)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/knowledge_base/knowledge_base.py", line 374, in knowledge_base_page
data = [
^
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/knowledge_base/knowledge_base.py", line 377, in
"id": x["id"],
~^^^^^^
TypeError: string indices must be integers, not 'str'

[dosubot]

你的报错是因为 httpx 库在 0.28.0 及以上版本已经移除了 Client/AsyncClient 的 proxies 参数支持，Langchain-Chatchat 目前的代码还在传递这个参数，导致 TypeError，进而引发 API 返回 None、JSON 解析失败等一系列连锁问题。

解决方法：将 httpx 降级到 0.27.2 即可恢复正常，命令如下：

pip install httpx==0.27.2

降级后重启服务即可。参考1 参考2

如果你需要兼容新版 httpx，可以考虑在相关代码（如 libs/python-sdk/open_chatcaht/utils.py 的 get_httpx_client）中判断 httpx 版本，0.28.0 及以上用新方式设置代理（如 ProxyTransport），否则继续用 proxies 参数。当前官方代码还未适配新版 httpx，建议关注后续更新。

To reply, just mention @dosu.

---

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[jackrous]

TypeError: 'NoneType' object is not iterable
2025-12-22 18:45:14.900 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 18:45:14.909 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 18:45:14.915 | ERROR | chatchat.webui_pages.utils:get:64 - InvalidURL: error when get /knowledge_base/list_knowledge_bases: Invalid port: ':1'
2025-12-22 18:45:14.915 | ERROR | chatchat.webui_pages.utils:to_json:233 - AttributeError: API未能返回正确的JSON。'NoneType' object has no attribute 'json'
2025-12-22 18:45:14.916 Uncaught app exception
Traceback (most recent call last):
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 600, in _run_script
exec(code, module.dict)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui.py", line 71, in
kb_chat(api=api)
File "/home/boss/Llama-factory/conda/envs/distall/lib/python3.11/site-packages/chatchat/webui_pages/kb_chat.py", line 118, in kb_chat
kb_list = [x["kb_name"] for x in api.list_knowledge_bases()]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: 'NoneType' object is not iterable
更新后还是出错

[dosubot]

你的报错“Invalid port: ':1'”和“'NoneType' object is not iterable”是因为 API 地址的端口配置有误，通常是环境变量或配置文件（如 .env、basic_settings.yaml、model_settings.yaml）里端口写成了 :1、空字符串、带多余符号，或者 no_proxy 环境变量里包含了未加中括号的 IPv6 地址 ::1，导致 httpx 解析失败，API 请求返回 None，进而触发后续 TypeError/AttributeError。

请按以下步骤排查和修正：

1. 检查所有相关配置文件（.env、basic_settings.yaml、model_settings.yaml），确保 API_SERVER、api_base_url、public_port 等端口字段是纯数字（如 7861），不能有冒号、括号或空值。例如：

   API_SERVER:
     host: 127.0.0.1
     port: 7861
     public_host: 127.0.0.1
     public_port: 7861

2. 检查环境变量，尤其是 no_proxy，必须写成 no_proxy=127.0.0.1,localhost,[::1]，不能有 ::1 或 [:1] 这种写法。建议同时 unset 掉 http_proxy、https_proxy、all_proxy 等代理相关变量，避免本地 API 通信被代理干扰。
3. 用 chatchat-config server --show 或在代码里打印实际 API 地址，确认格式类似 http://127.0.0.1:7861，没有多余符号。
4. 修正后重启所有 chatchat 相关服务。
5. 可以用 curl http://127.0.0.1:7861/knowledge_base/list_knowledge_bases 测试 API 是否能正常返回 JSON。
6. 如果只是想临时避免崩溃，可以把代码里的 kb_list = [x["kb_name"] for x in api.list_knowledge_bases()] 改成 kb_list = [x["kb_name"] for x in (api.list_knowledge_bases() or [])]，但这只是掩盖根本问题。

详细参考：官方 issue 1 | 官方 issue 2

如仍有问题，请贴出你的 no_proxy、API_SERVER、api_base_url 配置和 httpx 版本，便于进一步定位。

To reply, just mention @dosu.

---

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