pyright1.1.408

Pyright examines Python code and reports how values, functions, variables, and classes are used, helping developers catch type-related mistakes before they spread through a codebase. It is designed for large source bases and suits Python developers and teams maintaining typed projects.

Watch mode recalculates results incrementally as files change, so ongoing edits receive updated diagnostics. Configuration files let teams tune checking behavior and assign separate execution environments to different subdirectories. Each environment can specify its own module search paths, Python language version, and platform target.

Its typing support covers generics, variable annotations, structural subtyping, typed dictionaries, literal types, union syntax, variadic generics, user-defined type guards, and other standard typing specifications. Pyright can infer types for function return values, instance variables, class variables, and global variables, while its guards follow branches such as if and else. The software is supplied as both a command-line utility and a Language Server Protocol server. In an editor integration, the server completes keywords, symbols, and import names, can insert imports needed for type completions, and offers signature guidance as arguments are entered.

Alex Murray publishes pyright as open-source software for Linux, and version 1.1.408 requires Linux with snapd on x86_64 (amd64) architecture.