Python Pandas PeriodIndex - 将 PeriodArray 转换为指定频率
要将 PeriodArray 转换为指定的频率,请使用 periodIndex.asfreq() 方法。
首先,导入所需的库 -
import pandas as pd
创建一个 PeriodIndex 对象 -
periodIndex = pd.PeriodIndex(['2021-09-25 07:30:35', '2019-10-30 04:15:45', '2020-07-15 02:55:15', '2022-06-25 09:40:55'], freq="Y")
显示 PeriodIndex 对象 -
print("PeriodIndex...\n", periodIndex)
转换为指定的频率。我们将频率设置为了 asfreq() 的参数 -
print("\nConvert..\n", periodIndex.asfreq('M'))
示例
以下是代码 -
import pandas as pd # Create a PeriodIndex object # PeriodIndex is an immutable ndarray holding ordinal values indicating regular periods in time # We have set the frequency using the "freq" parameter periodIndex = pd.PeriodIndex(['2021-09-25 07:30:35', '2019-10-30 04:15:45', '2020-07-15 02:55:15', '2022-06-25 09:40:55'], freq="Y") # Display PeriodIndex object print("PeriodIndex...\n", periodIndex) # Display PeriodIndex frequency print("\nPeriodIndex frequency object...\n", periodIndex.freq) # Display PeriodIndex frequency as string print("\nPeriodIndex frequency object as a string...\n", periodIndex.freqstr) # Convert to the specified frequency # We have set the frequency as the parameter of the asfreq() print("\nConvert..\n", periodIndex.asfreq('M'))
输出
将生成以下代码 -
PeriodIndex... PeriodIndex(['2021', '2019', '2020', '2022'], dtype='period[A-DEC]') PeriodIndex frequency object... <YearEnd: month=12> PeriodIndex frequency object as a string... A-DEC Convert.. PeriodIndex(['2021-12', '2019-12', '2020-12', '2022-12'], dtype='period[M]')
广告