pandas 常用函数--round()_pandas round

pandas.DataFrame.round(decimals )

decimals : int, dict, Series

df = pd.DataFrame(np.random.random([3, 3]),
     columns=['A', 'B', 'C'], index=['first', 'second', 'third'])
print(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