def isRat(x):
    return isinstance(x, Rat)
ASCIIHexDecode filter: PDFReference v1.4 section 3.3.1
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/test/test_binop.py/isRat--crossover with--dataset/ETHPy150Open clips/pattern/pattern/web/pdf/ascii85.py/asciihexdecode