def eval_stream(stream, ctx: compiler.CompilerContext, module: types.ModuleType):
    """Evaluate the forms in stdin into a Python module AST node."""
    last = None
    for form in reader.read(stream, resolver=runtime.resolve_alias):
        last = compiler.compile_and_exec_form(form, ctx, module)
    return last
Evaluate the forms in stdin into a Python module AST node.