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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 fmt_size(size, binary=True):
    '''
    Get size and unit.

    :param size: size in bytes
    :type size: int
    :param binary: whether use binary or standard units, defaults to True
    :type binary: bool
    :return: size and unit
    :rtype: tuple of int and unit as str
    '''
    if binary:
        fmt_sizes = binary_units
        fmt_divider = 1024.
    else:
        fmt_sizes = standard_units
        fmt_divider = 1000.
    for fmt in fmt_sizes[:-1]:
        if size < 1000:
            return (size, fmt)
        size /= fmt_divider
    return size, fmt_sizes[-1]