Convert DD (decimal degrees) to DMS (degrees minutes seconds) in Python?

This is exactly what divmod was invented for:

>>> def decdeg2dms(dd):...   mnt,sec = divmod(dd*3600,60)...   deg,mnt = divmod(mnt,60)...   return deg,mnt,sec>>> dd = 45 + 30.0/60 + 1.0/3600>>> print dd45.5002777778>>> decdeg2dms(dd)(45.0, 30.0, 1.0)

Here is my updated version based upon Paul McGuire's. This one should handle negatives correctly.

def decdeg2dms(dd):   is_positive = dd >= 0   dd = abs(dd)   minutes,seconds = divmod(dd*3600,60)   degrees,minutes = divmod(minutes,60)   degrees = degrees if is_positive else -degrees   return (degrees,minutes,seconds)

If you want to handle negatives properly, the first non-zero measure is set negative. It is counter to common practice to specify all of degrees, minutes and seconds as negative (Wikipedia shows 40° 26.7717, -79° 56.93172 as a valid example of degrees-minutes notation, in which degrees are negative and minutes have no sign), and setting degrees as negative does not have any effect if the degrees portion is 0. Here is a function that adequately handles this, based on Paul McGuire's and baens' functions:

def decdeg2dms(dd):    negative = dd < 0    dd = abs(dd)    minutes,seconds = divmod(dd*3600,60)    degrees,minutes = divmod(minutes,60)    if negative:        if degrees > 0:            degrees = -degrees        elif minutes > 0:            minutes = -minutes        else:            seconds = -seconds    return (degrees,minutes,seconds)