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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _handlePressure(self, d):
 """ Parse an altimeter-pressure group. The following attributes are set: press [int] """

        press = d['press']
        if press != '////':
            press = float(press.replace('O', '0'))
            if d['unit']:
                if d['unit'] == 'A' or (d['unit2'] and d['unit2'] == 'INS'):
                    self.press = CustomPressure(press / 100, 'IN')
                elif d['unit'] == 'SLP':
                    if press < 500:
                        press = press / 10 + 1000
                    else:
                        press = press / 10 + 900
                    self.press = CustomPressure(press)
                    self._remarks.append("sea-level pressure %.1fhPa" % press)
                else:
                    self.press = CustomPressure(press)
            elif press > 2500:
                self.press = CustomPressure(press / 100, 'IN')
            else:
                self.press = CustomPressure(press)