Method transform_cell

IPython/core/interactiveshell.py:3164–3192

Transform an input cell before parsing it. Static transformations, implemented in IPython.core.inputtransformer2, deal with things like ``%magic`` and ``!system`` commands. These run on all input. Dynamic transformations, for things like unescaped magics and the exit

(self, raw_cell)

        return result

    def transform_cell(self, raw_cell):
        """Transform an input cell before parsing it.

        Static transformations, implemented in IPython.core.inputtransformer2,
        deal with things like ``%magic`` and ``!system`` commands.
        These run on all input.
        Dynamic transformations, for things like unescaped magics and the exit
        autocall, depend on the state of the interpreter.
        These only apply to single line inputs.

        These string-based transformations are followed by AST transformations;
        see :meth:`transform_ast`.
        """
        # Static input transformations
        cell = self.input_transformer_manager.transform_cell(raw_cell)

        if len(cell.splitlines()) == 1:
            # Dynamic transformations - only applied for single line commands
            with self.builtin_trap:
                # use prefilter_lines to handle trailing newlines
                # restore trailing newline for ast.parse
                cell = self.prefilter_manager.prefilter_lines(cell) + '\n'

        lines = cell.splitlines(keepends=True)
        for transform in self.input_transformers_post:
            lines = transform(lines)
        cell = ''.join(lines)

        return cell

    def transform_ast(self, node):
        """Apply the AST transformations from self.ast_transformers