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法律研究比较 Pandas DataFrame 中的特定时间戳 **–** Python
要比较特定的时间戳，请在方括号中使用索引号。首先，导入必需的库 −
import pandas as pd
创建一个有 3 列的 DataFrame。我们有带时间戳的两个日期列 −
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("2021-11-05"),
pd.Timestamp("2021-12-03"),
pd.Timestamp("2021-10-30"),
pd.Timestamp("2021-11-29"),
pd.Timestamp("2021-08-20"),
]
})
查找特定的时间戳，比如 1 到 3 行 −
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]) timestamp3_diff = abs(dataFrame['Date_of_Purchase'][2]-dataFrame['Date_of_Service'][2])
示例
以下为代码 −
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("2021-11-05"),
pd.Timestamp("2021-12-03"),
pd.Timestamp("2021-10-30"),
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])
timestamp3_diff = abs(dataFrame['Date_of_Purchase'][2]-dataFrame['Date_of_Service'][2])
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
print"\nDifference between Car 3 Date of Purchase and Service \n",timestamp3_diff输出
这将产生以下输出 −
DataFrame... Car Date_of_Purchase Date_of_Service 0 Audi 2021-06-10 2021-11-05 1 Lexus 2021-07-11 2021-12-03 2 Tesla 2021-06-25 2021-10-30 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 148 days 00:00:00 Difference between Car 2 Date of Purchase and Service 145 days 00:00:00 Difference between Car 3 Date of Purchase and Service 127 days 00:00:00
更新于： 15-9-2021
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