HelperFunctions.py 文件源码

def convert_to_hex(val, delimiter=':', force_sign=False):
    """
    Converts a numerical value into a hexidecimal string

    Parameters:
    ===========
    - val:           float
                     The decimal number to convert to hex.

    - delimiter:     string
                     The delimiter between hours, minutes, and seconds
                     in the output hex string.

    - force_sign:    boolean
                     Include the sign of the string on the output,
                     even if positive? Usually, you will set this to
                     False for RA values and True for DEC

    Returns:
    ========
    A hexadecimal representation of the input value.
    """
    s = np.sign(val)
    s_factor = 1 if s > 0 else -1
    val = np.abs(val)
    degree = int(val)
    minute = int((val  - degree)*60)
    second = (val - degree - minute/60.0)*3600.
    if degree == 0 and s_factor < 0:
        return '-00{2:s}{0:02d}{2:s}{1:.2f}'.format(minute, second, delimiter)
    elif force_sign or s_factor < 0:
        deg_str = '{:+03d}'.format(degree * s_factor)
    else:
        deg_str = '{:02d}'.format(degree * s_factor)
    return '{0:s}{3:s}{1:02d}{3:s}{2:.2f}'.format(deg_str, minute, second, delimiter)