Error converting DMS coordinates to decimal format

class GeoCoordinates:    def __init__(self, lat: Optional[float] = None, long: Optional[float] = None, dms: Optional[str] = None):        if (lat is not None and long is not None) and dms:            self.lat = lat            self.long = long            self.dms = self.decimal_to_dms(lat, long)        elif dms:            self.dms = dms            self.lat, self.long = self.dms_to_decimal(dms)        else:            raise ValueError("Either latitude and longitude or DMS format should be provided.")    def __str__(self) -> str:        return f"DMS: {self.dms}, Latitude: {self.lat}, Longitude: {self.long}"    def distance(self, other: GeoCoordinates) -> float:        earth_radius = 6373.0        lat1 = radians(self.lat)        lon1 = radians(self.long)        lat2 = radians(other.lat)        lon2 = radians(other.long)        dlon = lon2 - lon1        dlat = lat2 - lat1        a = sin(dlat/2)**2 + cos(lat1) * cos(lat2) * sin(dlon/2)**2        c = 2 * atan2(sqrt(a), sqrt(1 - a))        distance = earth_radius * c        return distance

I'm working on implementing a GeoCoordinates class in Python that stores coordinates in both Degree/Minute/Second (DMS) format and plain latitude/longitude format. However, I'm encountering a ValueError when trying to initialize the class with DMS coordinates. Here's the relevant code snippet:

gc_la = GeoCoordinates(dms='42°09′N 120°12′W')

and the error message:

ValueError: could not convert string to float: '42°09'

The GeoCoordinates class is designed to accept either DMS coordinates or latitude/longitude in decimal format. I've provided functions to convert between these formats, but it seems there's an issue with the conversion from DMS to decimal.