Method _from_subinterp

Lib/test/test_import/__init__.py:317–345

(cls, name, interpid, pipe, script_kwargs)

    @classmethod
    def _from_subinterp(cls, name, interpid, pipe, script_kwargs):
        r, w = pipe

        # Build the script.
        postscript = textwrap.dedent(f'''
            # Send the result over the pipe.
            import json
            import os
            os.write({w}, json.dumps(snapshot).encode())

            ''')
        _postscript = script_kwargs.get('postscript')
        if _postscript:
            _postscript = textwrap.dedent(_postscript).lstrip()
            postscript += _postscript
        script_kwargs['postscript'] = postscript.strip()
        script = cls.build_script(name, **script_kwargs)

        # Run the script.
        if interpid is None:
            ret = run_in_subinterp(script)
            if ret != 0:
                raise AssertionError(f'{ret} != 0')
        else:
            _interpreters.run_string(interpid, script)

        # Parse the results.
        text = os.read(r, 1000)
        return cls.parse(text.decode())


@force_not_colorized_test_class