27 lines
621 B
Python
27 lines
621 B
Python
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_formats = {
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'ymd': '{d.year}-{d.month}-{d.day}',
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'mdy': '{d.month}-{d.day}-{d.year}',
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'dym': '{d.day}-{d.month}-{d.year}'
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}
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# 通过重写类的__format__方法,我们可以让类在被填充的时候变成任何样子
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class Date:
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def __init__(self, year, month, day):
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self.year = year
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self.month = month
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self.day = day
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def __format__(self, code):
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if code == '':
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code = 'ymd'
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fmt = _formats[code]
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return fmt.format(d=self)
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d = Date(2024, 11, 11)
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format(d)
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format(d, 'mdy')
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"The Date is {:ymd}".format(d)
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"The Date is {:dym}".format(d)
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