How to use the getnative.utils.to_float function in getnative

mode = [scaler for scaler in common_scaler["bicubic"]]
        mode.append(common_scaler["bilinear"][0])
    elif args.mode == "all":
        mode = [s for scaler in common_scaler.values() for s in scaler]

    for i, scaler in enumerate(mode):
        if scaler is not None and scaler.plugin is None:
            print(f"Warning: No correct descale version found for {scaler}, continuing with next scaler when available.")
            continue
        getnative(args, src, scaler, first_time=True if i == 0 else False)


parser = argparse.ArgumentParser(description='Find the native resolution(s) of upscaled material (mostly anime)')
parser.add_argument('--frame', '-f', dest='frame', type=int, default=None, help='Specify a frame for the analysis. Random if unspecified. Negative frame numbers for a frame like this: src.num_frames // -args.frame')
parser.add_argument('--kernel', '-k', dest='kernel', type=str.lower, default="bicubic", help='Resize kernel to be used')
parser.add_argument('--bicubic-b', '-b', dest='b', type=to_float, default="1/3", help='B parameter of bicubic resize')
parser.add_argument('--bicubic-c', '-c', dest='c', type=to_float, default="1/3", help='C parameter of bicubic resize')
parser.add_argument('--lanczos-taps', '-t', dest='taps', type=int, default=3, help='Taps parameter of lanczos resize')
parser.add_argument('--aspect-ratio', '-ar', dest='ar', type=to_float, default=0, help='Force aspect ratio. Only useful for anamorphic input')
parser.add_argument('--min-height', '-min', dest="min_h", type=int, default=500, help='Minimum height to consider')
parser.add_argument('--max-height', '-max', dest="max_h", type=int, default=1000, help='Maximum height to consider')
parser.add_argument('--output-mask', '-mask', dest='mask_out', action="store_true", default=False, help='Save detail mask as png')
parser.add_argument('--plot-scaling', '-ps', dest='plot_scaling', type=str.lower, default='log', help='Scaling of the y axis. Can be "linear" or "log"')
parser.add_argument('--plot-format', '-pf', dest='plot_format', type=str.lower, default='svg', help='Format of the output image. Specify multiple formats separated by commas. Can be svg, png, pdf, rgba, jp(e)g, tif(f), and probably more')
parser.add_argument('--show-plot-gui', '-pg', dest='show_plot', action="store_true", default=False, help='Show an interactive plot gui window.')
parser.add_argument('--no-save', '-ns', dest='no_save', action="store_true", default=False, help='Do not save files to disk. Disables all output arguments!')
parser.add_argument('--is-image', '-img', dest='img', action="store_true", default=False, help='Force image input')
parser.add_argument('--stepping', '-steps', dest='steps', type=int, default=1, help='This changes the way getnative will handle resolutions. Example steps=3 [500p, 503p, 506p ...]')
parser.add_argument('--output-dir', '-dir', dest='dir', type=str, default="", help='Sets the path of the output dir where you want all results to be saved. (/results will always be added as last folder)')
def main():
    parser.add_argument(dest='input_file', type=str, help='Absolute or relative path to the input file')
    parser.add_argument('--use', '-u', default=None, help='Use specified source filter e.g. (lsmas.LWLibavSource)')

mode.append(common_scaler["bilinear"][0])
    elif args.mode == "all":
        mode = [s for scaler in common_scaler.values() for s in scaler]

    for i, scaler in enumerate(mode):
        if scaler is not None and scaler.plugin is None:
            print(f"Warning: No correct descale version found for {scaler}, continuing with next scaler when available.")
            continue
        getnative(args, src, scaler, first_time=True if i == 0 else False)


parser = argparse.ArgumentParser(description='Find the native resolution(s) of upscaled material (mostly anime)')
parser.add_argument('--frame', '-f', dest='frame', type=int, default=None, help='Specify a frame for the analysis. Random if unspecified. Negative frame numbers for a frame like this: src.num_frames // -args.frame')
parser.add_argument('--kernel', '-k', dest='kernel', type=str.lower, default="bicubic", help='Resize kernel to be used')
parser.add_argument('--bicubic-b', '-b', dest='b', type=to_float, default="1/3", help='B parameter of bicubic resize')
parser.add_argument('--bicubic-c', '-c', dest='c', type=to_float, default="1/3", help='C parameter of bicubic resize')
parser.add_argument('--lanczos-taps', '-t', dest='taps', type=int, default=3, help='Taps parameter of lanczos resize')
parser.add_argument('--aspect-ratio', '-ar', dest='ar', type=to_float, default=0, help='Force aspect ratio. Only useful for anamorphic input')
parser.add_argument('--min-height', '-min', dest="min_h", type=int, default=500, help='Minimum height to consider')
parser.add_argument('--max-height', '-max', dest="max_h", type=int, default=1000, help='Maximum height to consider')
parser.add_argument('--output-mask', '-mask', dest='mask_out', action="store_true", default=False, help='Save detail mask as png')
parser.add_argument('--plot-scaling', '-ps', dest='plot_scaling', type=str.lower, default='log', help='Scaling of the y axis. Can be "linear" or "log"')
parser.add_argument('--plot-format', '-pf', dest='plot_format', type=str.lower, default='svg', help='Format of the output image. Specify multiple formats separated by commas. Can be svg, png, pdf, rgba, jp(e)g, tif(f), and probably more')
parser.add_argument('--show-plot-gui', '-pg', dest='show_plot', action="store_true", default=False, help='Show an interactive plot gui window.')
parser.add_argument('--no-save', '-ns', dest='no_save', action="store_true", default=False, help='Do not save files to disk. Disables all output arguments!')
parser.add_argument('--is-image', '-img', dest='img', action="store_true", default=False, help='Force image input')
parser.add_argument('--stepping', '-steps', dest='steps', type=int, default=1, help='This changes the way getnative will handle resolutions. Example steps=3 [500p, 503p, 506p ...]')
parser.add_argument('--output-dir', '-dir', dest='dir', type=str, default="", help='Sets the path of the output dir where you want all results to be saved. (/results will always be added as last folder)')
def main():
    parser.add_argument(dest='input_file', type=str, help='Absolute or relative path to the input file')
    parser.add_argument('--use', '-u', default=None, help='Use specified source filter e.g. (lsmas.LWLibavSource)')
    parser.add_argument('--mode', '-m', dest='mode', type=str, choices=_modes, default=None, help='Choose a predefined mode ["bilinear", "bicubic", "bl-bc", "all"]')