CODE EXAMPLE FOR PYTHON

python convert 12 hour time to 24 hour

df['Time'] = pd.to_datetime(df['Time'], format='%I:%M:%S %p').dt.strftime('%H:%M:%S')
print (df)
       Time
1  17:21:26
2  17:21:58
3  17:22:22
4  17:22:36
5  19:18:16