Pyright

Pyright is a fast type checker meant for large Python source bases. It can run in a “watch” mode and performs fast incremental updates when files are modified. Pyright supports configuration files that provide granular control over settings. Different “execution environments” can be associated with subdirectories within a source base. Each environment can specify different module search paths, python language versions, and platform targets. Type inference for function return values, instance variables, class variables, and globals. Type guards that understand conditional code flow constructs like if/else statements. Type hinting generics in standard collections. Pyright ships as both a command-line tool and a VS Code extension that provides many powerful features that help improve programming efficiency. The VS Code extension supports many time-saving language features.