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Pandas显示小数位数:pd.round(2)
- >>> df = pd.DataFrame(np.random.random([3, 3]),
- ... columns=['A', 'B', 'C'], index=['first', 'second', 'third'])
- >>> df
- A B C
- first 0.028208 0.992815 0.173891
- second 0.038683 0.645646 0.577595
- third 0.877076 0.149370 0.491027
- >>> df.round(2)
- A B C
- first 0.03 0.99 0.17
- second 0.04 0.65 0.58
- third 0.88 0.15 0.49
- >>> df.round({'A': 1, 'C': 2})
- A B C
- first 0.0 0.992815 0.17
- second 0.0 0.645646 0.58
- third 0.9 0.149370 0.49
- >>> decimals = pd.Series([1, 0, 2], index=['A', 'B', 'C'])
- >>> df.round(decimals)
- A B C
- first 0.0 1 0.17
- second 0.0 1 0.58
- third 0.9 0 0.49
Python的print中显示小数位数使用占位符:%.2f
- # 显示2位小数
- a=30.818181818181817
- print('%.2f'%a)
- Out:30.82
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