如何生成從此處，參考產生以前的時間戳每個TimeDelta一個時間戳列TimedeltaIndex

Question

我有時間戳列表：

Timestamp 

2015-10-01 00:00:08          
2015-10-01 00:00:18          
2015-10-01 00:00:28          
2015-10-01 00:00:38          
2015-10-01 00:00:48          
2015-10-01 00:00:58          
2015-10-01 00:01:08          
2015-10-01 00:01:17 

，我想生成時間戳，其中TimeDeltas每個TimeDelta值取基準從以前的時間戳是這樣的：

Timestamp    TimeDelta 

2015-10-01 00:00:08  00:00:00.000       
2015-10-01 00:00:18  00:00:10.000      
2015-10-01 00:00:28  00:00:10.000      
2015-10-01 00:00:38  00:00:10.000      
2015-10-01 00:00:48  00:00:10.000      
2015-10-01 00:00:58  00:00:10.000      
2015-10-01 00:01:08  00:00:10.000      
2015-10-01 00:01:17  00:00:09.000 

但相反我得到這個：

Timestamp    TimeDelta 

2015-10-01 00:00:08  00:00:00.000       
2015-10-01 00:00:18  00:00:10.000      
2015-10-01 00:00:28  00:00:20.000      
2015-10-01 00:00:38  00:00:30.000      
2015-10-01 00:00:48  00:00:40.000      
2015-10-01 00:00:58  00:00:50.000      
2015-10-01 00:01:08  00:01:00.000      
2015-10-01 00:01:17  00:01:09.000 

我用下面的代碼：

df['TimeDelta'] = pd.TimedeltaIndex(df['Timestamp']) 

謝謝！

Answer 1

使用diff法計算相鄰行的區別：

df['TimeDelta'] = df['Timestamp'].diff().fillna(0) 

---

import pandas as pd 

df = pd.DataFrame({'Timestamp': ['2015-10-01 00:00:08', '2015-10-01 00:00:18', 
    '2015-10-01 00:00:28', '2015-10-01 00:00:38', '2015-10-01 00:00:48', 
    '2015-10-01 00:00:58', '2015-10-01 00:01:08', '2015-10-01 00:01:17']}) 
df['Timestamp'] = pd.to_datetime(df['Timestamp']) 
df['TimeDelta'] = df['Timestamp'].diff().fillna(0) 
print(df) 

產量

  Timestamp TimeDelta 
0 2015-10-01 00:00:08 00:00:00 
1 2015-10-01 00:00:18 00:00:10 
2 2015-10-01 00:00:28 00:00:10 
3 2015-10-01 00:00:38 00:00:10 
4 2015-10-01 00:00:48 00:00:10 
5 2015-10-01 00:00:58 00:00:10 
6 2015-10-01 00:01:08 00:00:10 
7 2015-10-01 00:01:17 00:00:09