def _create_ranges()

in xray-setup/psycopg2/_range.py [0:0]

• 26 lines of code
• 14 McCabe index (conditional complexity)

    def _create_ranges(self, pgrange, pyrange):
        """Create Range and RangeAdapter classes if needed."""
        # if got a string create a new RangeAdapter concrete type (with a name)
        # else take it as an adapter. Passing an adapter should be considered
        # an implementation detail and is not documented. It is currently used
        # for the numeric ranges.
        self.adapter = None
        if isinstance(pgrange, string_types):
            self.adapter = type(pgrange, (RangeAdapter,), {})
            self.adapter.name = pgrange
        else:
            try:
                if issubclass(pgrange, RangeAdapter) \
                        and pgrange is not RangeAdapter:
                    self.adapter = pgrange
            except TypeError:
                pass

        if self.adapter is None:
            raise TypeError(
                'pgrange must be a string or a RangeAdapter strict subclass')

        self.range = None
        try:
            if isinstance(pyrange, string_types):
                self.range = type(pyrange, (Range,), {})
            if issubclass(pyrange, Range) and pyrange is not Range:
                self.range = pyrange
        except TypeError:
            pass

        if self.range is None:
            raise TypeError(
                'pyrange must be a type or a Range strict subclass')