如何打印数据框的开始和结束日期？

Question

我有这些代码行，当我运行它时，我想像这样查看训练、验证和测试的日期：

2012-01-01 00:00:00 --- 2013-12-31 23:00:00:00

而不是指数：

20150 --- 20189

datos = df_energy.loc['2015-07-02 01:00:00': '2021-11-30 15:00:00']

fin_train = '2019-12-31 23:59:00'
fin_validacion = '2020-11-30 23:59:00'

datos_train = datos.loc[:fin_train, :]
datos_val   = datos.loc[fin_train: fin_validacion, :]
datos_test  = datos.loc[fin_validacion:, :]

print(f"Fechas train      : {datos_train.index.min()} --- {datos_train.index.max()}")
print(f"Fechas validacion : {datos_val.index.min()} --- {datos_val.index.max()}")
print(f"Fechas test       : {datos_test.index.min()} --- {datos_test.index.max()}")

Answer 1

您已经有了索引，只需使用它们来获取相关值即可。我将为示例性的火车数据这样做，然后您可以将其同等地转移到其他数据集：

def gen_timerange(df, col='UTC Time'):
    min_time = df.loc[df.index.min(), col]
    max_time = df.loc[df.index.max(), col]
    return f"{min_time} --- {max_time}"

print(f"Fechas train      : {gen_timerange(datos_train)}")

如何打印数据框的开始和结束日期？

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