def datestampInRange(header, from_, until):
    if from_ is not None and from_ < header.datestamp():
        return False
    if until is not None and header.datestamp() > until:
        return False
    return True
dataset/ETHPy150Open infrae/pyoai/src/oaipmh/tests/fakeserver.py/datestampInRange/swapped operands of `<`