Creating Time Period

timeperiod.py

def timeperiod(time):
    if time >= datetime.time(0,0,0) and time < datetime.time(4,0,0):
        return "12am-4am"
    elif time >= datetime.time(4,0,0) and time < datetime.time(8,0,0):
        return "4am-8am"
    elif time >= datetime.time(8,0,0) and time < datetime.time(12,0,0):
        return "8am-12pm"
    elif time >= datetime.time(12,0,0) and time < datetime.time(16,0,0):
        return "12pm-4pm"    
    elif time >= datetime.time(16,0,0) and time < datetime.time(20,0,0):
        return "4pm-8pm"    
    else:
        return "8pm-12am"  
        
df_10['TIME_PERIOD'] = df_10['TIME'].apply(timeperiod)