def tax_subtract(price, tax_percentage=21):
    if price is None:
        return None

    result = price / ((100 + tax_percentage) / D(100))
    return result.quantize(D('0.01'), ROUND_HALF_UP)
Focus the buffer with the given name.
dataset/ETHPy150Open django-oscar/django-oscar/src/oscar/test/factories/utils.py/tax_subtract--crossover with--dataset/ETHPy150Open jonathanslenders/python-prompt-toolkit/prompt_toolkit/buffer_mapping.py/BufferMapping.focus