{"id":14944,"library":"streamlit-ace","title":"Streamlit Ace Editor Component","description":"streamlit-ace is a Streamlit component that embeds the Ace code editor, allowing users to interact with code snippets directly within their Streamlit applications. The library is currently at version 0.1.1, with its last commit in late 2021, indicating a slow release cadence and potential for compatibility considerations with recent Streamlit versions.","status":"maintenance","version":"0.1.1","language":"en","source_language":"en","source_url":"https://github.com/okld/streamlit-ace","tags":["streamlit","editor","code","component","ace-editor"],"install":[{"cmd":"pip install streamlit-ace","lang":"bash","label":"Install with pip"}],"dependencies":[{"reason":"required to run the Streamlit component","package":"streamlit","optional":false}],"imports":[{"symbol":"st_ace","correct":"from streamlit_ace import st_ace"}],"quickstart":{"code":"import streamlit as st\nfrom streamlit_ace import st_ace\n\nst.set_page_config(layout=\"wide\")\nst.title(\"Streamlit Ace Editor Example\")\n\ninitial_content = \"\"\"import pandas as pd\n\ndef hello_world():\n    print(\"Hello, Streamlit Ace!\")\n\nhello_world()\n\"\"\"\n\ncontent = st_ace(\n    value=initial_content,\n    language=\"python\",\n    theme=\"dracula\",\n    keybinding=\"vscode\",\n    height=200,\n    font_size=14,\n    tab_size=4,\n    show_gutter=True,\n    show_print_margin=True,\n    wrap=False,\n    auto_update=True, # Set to True to get immediate updates\n    readonly=False,\n    annotations=[{\"row\": 0, \"column\": 0, \"text\": \"Welcome to Ace!\", \"type\": \"info\"}]\n)\n\nst.subheader(\"Editor Content:\")\nst.code(content, language=\"python\")\n\nif st.button(\"Run Code (simulated)\"):\n    st.success(\"Code execution triggered with current content.\")","lang":"python","description":"This example demonstrates how to embed the Ace editor in a Streamlit application, initialize it with content, and retrieve the user's edits. The `auto_update=True` parameter ensures that changes in the editor are immediately reflected in the Streamlit app."},"warnings":[{"fix":"Test thoroughly with your target Streamlit version. If styling issues occur, consider using custom CSS overrides. For critical compatibility issues, exploring alternative components or implementing a custom component might be necessary.","message":"The `streamlit-ace` library has not been updated since late 2021 (v0.1.1). While generally functional, it may exhibit styling inconsistencies or unexpected behavior with newer versions of Streamlit (e.g., Streamlit 1.x or 2.x) due to changes in Streamlit's frontend or component API.","severity":"gotcha","affected_versions":"Streamlit >= 1.0"},{"fix":"Set `auto_update=True` in the `st_ace` call if you need immediate feedback (e.g., for real-time code analysis). Alternatively, ensure your Streamlit app has a button or other interactive element that triggers a rerun to fetch the editor's latest content after user edits.","message":"By default, `st_ace` does not automatically update its value back to Streamlit on every keystroke (`auto_update=False`). You need to explicitly trigger an update or rely on Streamlit's rerun mechanism to fetch the latest content.","severity":"gotcha","affected_versions":"All"},{"fix":"To get the latest content, ensure `auto_update=True` is set, which triggers a rerun on every change (can be resource-intensive for large documents). If `auto_update=False`, add a Streamlit button (e.g., `st.button('Get Code')`) that triggers a rerun and retrieves the editor's current content.","message":"The component's returned value is the content of the editor at the time of Streamlit's rerun. If the user modifies the editor in the browser, these changes are not immediately visible to the Python script until a new rerun occurs.","severity":"gotcha","affected_versions":"All"}],"env_vars":null,"last_verified":"2026-04-17T00:00:00.000Z","next_check":"2026-07-16T00:00:00.000Z","problems":[{"fix":"Run `pip install streamlit-ace` in your terminal to install the required package.","cause":"The `streamlit-ace` package has not been installed in the current Python environment.","error":"ModuleNotFoundError: No module named 'streamlit_ace'"},{"fix":"Add `from streamlit_ace import st_ace` at the top of your Streamlit script to import the function.","cause":"The `st_ace` function was not imported from the `streamlit_ace` package.","error":"NameError: name 'st_ace' is not defined"},{"fix":"Refer to the `streamlit-ace` documentation or the quickstart example for the correct keyword arguments. In this case, change `lang='python'` to `language='python'`.","cause":"An invalid or misspelled keyword argument was passed to `st_ace`. For specifying the programming language, the correct argument is `language`, not `lang`.","error":"TypeError: st_ace() got an unexpected keyword argument 'lang'"}],"ecosystem":"pypi"}