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Check annotated Python code for type inconsistencies before running it.

Format Python files consistently from the command line or as a repeatable project check.

A browser-based Python notebook environment that runs on hosted compute and can load or share Jupyter notebooks.

Build composable Python command-line interfaces from decorated functions.

Choose Python research and backtesting engines for the task

Use continuous and categorical colour maps in Python visualizations.

Correct photo color through task-based workspaces

Calculate colour from spectral samples and compare the results in Python.

Rewrite Git history to remove paths, extract directories or apply custom filters.

Find named colours, inspect hex values and explore related shades.

Calculate returns, portfolio statistics and allocation weights in Python

Maintain event-driven Python backtests with the Zipline research model

Fit, evaluate, and reuse Python models for common supervised and unsupervised machine-learning tasks.

Inspect colour values and CSS examples, then browse community palettes.

Python tools for inspecting and manipulating font files.

Convert and interpolate colours through an extensible Python object.

Use one Python interface for several established colour-palette collections.

Parse CSS colour strings and build adjusted values in JavaScript.

Work with colour spaces and colour relationships in Go.

Python articles, tutorials and community news

A written Python route from setup to practical topics

Build Python web applications by pairing a small request-and-route core with the extensions your project needs.

Test entry and exit rules against historical price bars

Develop Python strategies with graphical backtesting and market gateways