def build_JoinedStr(ctx, expr): s = '' args = [] for value in expr.values: r = ctx.make_range(value.lineno, value.col_offset, value.col_offset + 1) if isinstance(value, ast.FormattedValue): if value.conversion != -1: raise NotSupportedError( r, 'Don\'t support conversion in JoinedStr') if value.format_spec is not None: raise NotSupportedError( r, 'Don\'t support formatting in JoinedStr') s += '{}' args.append(build_expr(ctx, value.value)) elif isinstance(value, ast.Str): s += value.s else: raise NotSupportedError(r, 'Unsupported value in JoinedStr') r = ctx.make_range(expr.lineno, expr.col_offset, expr.col_offset + 1) return Apply(Select(StringLiteral(r, s), Ident(r, 'format')), args, [])