basedpython language reference¶

basedpython is a Python-like language that transpiles to pure Python

getting started¶

• getting started

tools¶

by and buff are available when the basedpython package is installed

• by cli reference

runtime compatibility¶

• polyfills

project-level features¶

• api lockfile (api.lock)

basedpython language features¶

• tuple type literals
• callable arrow syntax
• intersection types
• negation types (not T)
• typeof keyword
• star projections (X[*])
• strict float and complex
• literal type promotion
• typed dict literals
• anonymous named tuple types
• explicit typevar constraints
• typevar variance keywords
• explicit generic call sites
• automatic forward references
• implicit typing imports
• typed lambda
• implicit overload stubs
• decorator keyword
• type narrowing predicates
• generics

syntax extensions¶

• modifiers and visibility
• init method shorthand
• empty declarations
• identity and isinstance (=== / !== / is)
• optional chaining (?.)
• none-coalesce operator (??)
• mutable default arguments
• dedented triple-quoted strings
• tuple member access (expr.N)
• keyword arguments in subscripts
• unpack syntax
• super keyword
• cast keyword
• sentinel declarations
• lazy imports
• repeated _ parameters

development¶

• how transpilation works
• reverse transforms