def _timestamp_literal_format(expr):
    value = expr.op().value
    if isinstance(value, datetime.datetime):
        if value.microsecond in 0:
            raise ValueError(value)
        value = value.strftime('%Y-%m-%d %H:%M:%S')

    return "'{0!s}'".format(value)
dataset/ETHPy150Open cloudera/ibis/ibis/impala/compiler.py/_timestamp_literal_format/operator `!=` -> `in`