How to Install `dash` in Python

v4.1.0 Web & HTTP Python >=3.8 MIT

A Python framework for building reactive web-apps. Developed by Plotly.

Install pip install dash

What is dash?

A Python framework for building reactive web-apps. Developed by Plotly.

Dash is the most downloaded, trusted Python framework for building ML & data science web apps.

Built on top of Plotly.js, React and Flask, Dash ties modern UI elements like dropdowns, sliders, and graphs directly to your analytical Python code. Read our tutorial (proudly crafted ❤️ with Dash itself).

- Docs: Create your first Dash app in under 5 minutes

Documentation → PyPI page → Author: Chris Parmer

Quick Start

Minimal example to get started with dash:

import dash

print(dash.__version__)

Installation

pip (standard)

pip install dash

Virtual environment (recommended)

python -m venv venv
source venv/bin/activate   # Windows: venv\Scripts\activate
pip install dash

pip3

pip3 install dash

conda

conda install -c conda-forge dash

Poetry

poetry add dash

Dependencies

Installing dash will also install these packages:

Flask Werkzeug plotly importlib-metadata typing_extensions requests retrying nest-asyncio setuptools

Verify the Installation

After installing, confirm the package is available:

python -c "import dash; print(dash.__version__)"

If this prints a version number, installation succeeded. If you see a ModuleNotFoundError, see the errors section below.

Installation Errors

Common errors when installing dash with pip.

ModuleNotFoundError: No module named 'dash'

Cause: The package is not installed in the current Python environment.

Fix: Run pip install dash. If using a virtual environment, ensure it is activated first.

ModuleNotFoundError: No module named 'dash' (installed but still failing)

Cause: pip installed the package into a different Python than the one running your script.

Fix: Use python -m pip install dash to install into the interpreter you are running.

ImportError: cannot import name 'X' from 'dash'

Cause: The function or class does not exist in the installed version.

Fix: Check the version with pip show dash and upgrade with pip install --upgrade dash.

pip: command not found

Cause: pip is not in PATH or Python was not added to PATH during installation.

Fix: Try python -m pip install dash. On macOS/Linux try pip3.

PermissionError: [Errno 13] Permission denied

Cause: No write access to the system Python package directory.

Fix: Use a virtual environment, or add --user: pip install --user dash

SSL: CERTIFICATE_VERIFY_FAILED

Cause: pip cannot verify PyPI's SSL certificate — common behind corporate proxies.

Fix: Try: pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org dash

ConnectionError: Failed to establish a new connection

Cause: Server unreachable, URL invalid, or firewall/proxy blocking the connection.

Fix: Verify the URL and network access. Set HTTP_PROXY / HTTPS_PROXY env vars if behind a proxy.

SSLError: CERTIFICATE_VERIFY_FAILED

Cause: The remote server's SSL certificate cannot be verified.

Fix: Update CA certificates on your system. For testing only, disable SSL verification (never in production).

Recent Releases

Version	Released
`4.1.0` latest	2026-03-23
`4.1.0rc0`	2026-02-23
`4.0.0`	2026-02-03
`3.4.0`	2026-01-20
`4.0.0rc6`	2026-01-12

Full release history on PyPI →

Manage dash

Upgrade to latest version

pip install --upgrade dash

Install a specific version

pip install dash==4.1.0

Uninstall

pip uninstall dash

Check what is installed

pip show dash

Last updated: 2026-04-11 • Data from PyPI

How to Install dash in Python