dtale

library3.22.0pypypi✓ verified 85d ago

A web-based visualizer for pandas DataFrames, offering an intuitive GUI for data exploration, transformation, and analysis. Current version is 3.22.0, with regular releases every few months.

data web-framework

pip install dtale

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · DTALE

dtale

datapythonv3.22.0

Install

31.4s avg

Import

8450ms

Disk

815MB

Pass rate

5/ 10

Env Coverage5 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v3.22.0 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.910 runs

build_error

glibc

py 3.10–3.910 runs

installs and imports cleanly · install 31.4s · import 8.450s · 780MB

815MB installed

● package 815MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

dtale

✓ import dtale

top-level module, no subpackage import needed

show

✓ from dtale import show

main function to launch UI

Launch D-Tale UI for a DataFrame, disable subprocess and browser auto-open for script usage.

import pandas as pd import dtale df = pd.DataFrame({'x': [1,2,3], 'y': [4,5,6]}) d = dtale.show(df, subprocess=False, open_browser=False) print('Data opened at:', d._main_url) d.close()

dtale --version

Debug

Known issues

breakingVersion 3.22.0 fixes CWE-502 unsafe deserialization in Redis/Shelve backends. If you use those storage backends, upgrade immediately.

fix

pip install --upgrade dtale

affects: <3.22.0

deprecatedIn older versions, the default behavior was to run a subprocess and open browser automatically. In recent versions, subprocess=False and open_browser=False are recommended for scripting.

fix

Pass subprocess=False and open_browser=False to dtale.show()

affects: >=3.14.0

gotchaCalling dtale.show() multiple times without closing previous instances can cause port conflicts. Always close with instance.close() or reuse the same instance.

fix

Store the returned object and call .close() when done, or use subprocess=True to let it manage a separate process.

affects: all

breakingIn version 3.17.0, dash 3.0.0 support introduced breaking changes; custom code using dash internals may need updates.

fix

Check dash integration if you have custom callbacks; ensure dash version compatibility.

affects: 3.17.0+

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'dtale'

dtale not installed or virtual environment not activated.

fix

Run pip install dtale in your environment, or activate the correct virtualenv.

OSError: [Errno 98] Address already in use

Previous D-Tale instance still running on the same port, or port conflict.

fix

Close any running D-Tale instances (e.g., call .close() on the object) or specify a different port via dtale.show(df, host='localhost', port=12345).

AttributeError: module 'dtale' has no attribute 'show'

Installed a wrong package named 'dtale' from a different source, or import path issue.

fix

Uninstall any conflicting packages (pip uninstall dtale) and reinstall the correct one (pip install dtale) from PyPI.

ValueError: invalid mode: 'r' while trying to open D-Tale

D-Tale is trying to open a file or resource incorrectly, often due to missing dependencies or permissions.

fix

Ensure all required dependencies (flask, dash, etc.) are installed. Try restarting the Python interpreter.

TypeError: show() got an unexpected keyword argument 'subprocess'

Using an older version of dtale (<3.14.0) that does not support the subprocess parameter.

fix

Upgrade dtale: pip install --upgrade dtale

Upgrade

Version history

3.22.0latest on PyPI · released Apr 1, 2026

Audit

Dependencies

pandasrequiredcore data structure dependency

flaskrequiredweb server backend

dashrequiredinteractive dashboard components

flask-ngrokoptionaloptional: expose server via ngrok

Agent activity

9 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/man-group/dtale ↗

packagehttps://pypi.org/project/dtale/ ↗

homepagehttps://dtale.readthedocs.io ↗