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修改 pytables 表格里的行的问题
source link: https://www.v2ex.com/t/842897
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使用 class Brief 创建了一个 pytables 的表格，问题是创建后的表格是不按照 class Brief 指定的顺序创建列，有可能列的顺序是（ debut ，price ，appear ，counter ，name ，update ）或者是其他顺序，而使用 modify_rows 修改表格里的行必须按照指定的数据类型。
class Brief(tb.IsDescription):
name = tb.StringCol(256)
price = tb.Float32Col()
debut = tb.Time32Col()
update = tb.Time32Col()
counter = tb.UInt64Col()
appear = tb.BoolCol()
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