def _guess_method(self):
        if self.args.method is None:
            # Invoked as `http URL'.
            assert not self.args.items
            if not self.args.ignore_stdin and not self.env.stdin_isatty:
                self.args.method = HTTP_POST
            else:
                self.args.method = HTTP_GET

        # FIXME: False positive, e.g., "localhost" matches but is a valid URL.
        elif not re.match('^[a-zA-Z]+$', self.args.method):
            # Invoked as `http URL item+'. The URL is now in `args.method`
            # and the first ITEM is now incorrectly in `args.url`.
            try:
                # Parse the URL as an ITEM and store it as the first ITEM arg.
                self.args.items.insert(
                    0,
                    KeyValueArgType(*SEP_GROUP_ITEMS).__call__(self.args.url)
                )

            except ArgumentTypeError as e:
                if self.args.traceback:
                    raise
                self.error(e.message)

            else:
                # Set the URL correctly
                self.args.url = self.args.method
                # Infer the method
                has_data = (
                    (not self.args.ignore_stdin and
                     not self.env.stdin_isatty) or any(
                        item.sep in SEP_GROUP_DATA_ITEMS
                        for item in self.args.items
                    )
                )
                self.args.method = HTTP_POST if has_data else HTTP_GET
Set `args.method` if not specified to either POST or GET
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/httpie/input.py/Parser._guess_method