Function get_graycode_order

pywt/_wavelet_packets.py:22–27

(level, x='a', y='d')

def get_graycode_order(level, x='a', y='d'):
    graycode_order = [x, y]
    for i in range(level - 1):
        graycode_order = [x + path for path in graycode_order] + \
                         [y + path for path in graycode_order[::-1]]
    return graycode_order


class BaseNode: