比较 Python 中的时间戳 – Pandas

为了比较时间戳，我们可以使用索引运算符，即方括号。首先，导入所需的库 -

import pandas as pd

创建一个包含 3 列的 DataFrame -

dataFrame = pd.DataFrame(
   {
      "Car": ["Audi", "Lexus", "Tesla", "Mercedes", "BMW"],

      "Date_of_Purchase": [
         pd.Timestamp("2021-06-10"),
         pd.Timestamp("2021-07-11"),
         pd.Timestamp("2021-06-25"),
         pd.Timestamp("2021-06-29"),
         pd.Timestamp("2021-03-20"),
      ],
      "Date_of_Service": [
          pd.Timestamp("2021-11-10"),
          pd.Timestamp("2021-12-11"),
          pd.Timestamp("2021-11-25"),
          pd.Timestamp("2021-11-29"),
          pd.Timestamp("2021-08-20"),
      ]
   })

现在让我们比较两个日期列中的一些时间戳 -

timestamp1_diff = abs(dataFrame['Date_of_Purchase'][0]-dataFrame['Date_of_Service'][0])
timestamp2_diff = abs(dataFrame['Date_of_Purchase'][1]-dataFrame['Date_of_Service'][1])

比较所有时间戳 -

timestamp_diff = abs(dataFrame['Date_of_Purchase']-dataFrame['Date_of_Service'])

示例

以下是完整的代码 -

import pandas as pd

# create a dataframe with 3 columns
dataFrame = pd.DataFrame(
   {
      "Car": ["Audi", "Lexus", "Tesla", "Mercedes", "BMW"],

      "Date_of_Purchase": [
         pd.Timestamp("2021-06-10"),
         pd.Timestamp("2021-07-11"),
         pd.Timestamp("2021-06-25"),
         pd.Timestamp("2021-06-29"),
         pd.Timestamp("2021-03-20"),
      ],
      "Date_of_Service": [
         pd.Timestamp("2021-11-10"),
         pd.Timestamp("2021-12-11"),
         pd.Timestamp("2021-11-25"),
         pd.Timestamp("2021-11-29"),
         pd.Timestamp("2021-08-20"),
      ]
   })

print"DataFrame...\n", dataFrame

# compare specific timestamps
timestamp1_diff = abs(dataFrame['Date_of_Purchase'][0]-dataFrame['Date_of_Service'][0])
timestamp2_diff = abs(dataFrame['Date_of_Purchase'][1]-dataFrame['Date_of_Service'][1])
print"\nDifference between Car 1 Date of Purchase and Service \n",timestamp1_diff
print"\nDifference between Car 2 Date of Purchase and Service \n",timestamp2_diff

# compare all timestamps by finding difference
timestamp_diff = abs(dataFrame['Date_of_Purchase']-dataFrame['Date_of_Service'])
print"\nDifference between two Timestamps: \n",timestamp_diff

这将产生以下输出 -

DataFrame...
        Car   Date_of_Purchase   Date_of_Service
0      Audi         2021-06-10        2021-11-10
1     Lexus         2021-07-11        2021-12-11
2     Tesla         2021-06-25        2021-11-25
3  Mercedes         2021-06-29        2021-11-29
4       BMW         2021-03-20        2021-08-20

Difference between Car 1 Date of Purchase and Service
153 days 00:00:00

Difference between Car 2 Date of Purchase and Service
153 days 00:00:00

Difference between two Timestamps:
0   153 days
1   153 days
2   153 days
3   153 days
4   153 days
dtype: timedelta64[ns]