How to update field in csv with python

Question

i have field (name, time, date ,latest time) if name not in name list i just write name,time and date but if name was into namelist i want to update and add latest time into that row file Csv Example

if choice == 'LOGIN': 
st.markdown("<h2 style='text-align: center; color: black;'>ATTEDANCE</h2>", unsafe_allow_html=True) #title
with col1: #column 1
    st.subheader("LOGIN")
    run = st.checkbox("Run camera") #checkbox
    run2 = st.checkbox("Run camera2") #checkbox
if run == True:
    for cl in myList: #loop
        curlImg = cv2.imread(f'{path}/{cl}') #read image
        images.append(curlImg)
        classNames.append(os.path.splitext(cl)[0]) #split image name
    print(classNames)

    def findEncodings(images): #find encoding
        encodeList = []
        for img in images:
            img = cv2.cvtColor(img,cv2.COLOR_BGR2RGB)
            encode = face_recognition.face_encodings(img)[0]
            encodeList.append(encode)
        return encodeList

    def faceList(name):
        with open('absensi.csv', 'r+') as f:
            myDataList = f.readlines()
            nameList = []
            for line in myDataList:
                entry = line.split(',')
                nameList.append(entry[0])
            if name not in nameList:
                now = datetime.now()
                dtString = now.strftime('%H:%M:%S')
                today = date.today()
                dtString2 = now.strftime('%d/%m/%Y')
                print("Today's date:", today)
                f.writelines(f'\n{name},{dtString},{dtString2}')

    encodeListUnkown = findEncodings(images)
    print('encoding complate!')