Q:

Converting dd° mm.mmm' to dd.ddddd° (latitude & longitude) in Python 3

I have GPS coordinates in the form 
Lat = 3648.5518
Lon = 17443.258
I want to convert then to the more traditional format 
Lat = -36.8091667 
Lon = 174.7209667
I can do this through string manipulation as shown below.  However this approach seems very "wordy". Is there a better way (any inbuilt functionality) to achieve this conversion in Python 3.4?  my searches have come up blank.  Any advice would be much appreciated. 
Steve (New to python/programming)
Lat = 3648.5518
Lat = str(Lat)
Latdd = float(Lat[:2])
Latmmmmm = float(Lat[2:])
Latddmmmm = Latdd+(Latmmmmm/60.0)
print(Latddmmmm)

Lon = 17443.258
Lon = str(Lon)
Londd = float(Lon[:3])
Lonmmmmm = float(Lon[3:])
Londdmmmm = Londd+(Lonmmmmm/60.0)
print(Londdmmmm)

A:

It looks like the input is an abuse of decimal notation to place write deg min as 100*deg + min.  
You can extract the degree, minute and second parts with modulo division.  Split into two functions for clarity. 
def dm(x):
    degrees = int(x) // 100
    minutes = x - 100*degrees

    return degrees, minutes

def decimal_degrees(degrees, minutes):
    return degrees + minutes/60 

print (decimal_degrees(*dm(3648.5518)))

