Link Python to Arduino UNO

1int datafromUser=0;
2void setup() {
3  // put your setup code here,  to run once:
4  pinMode( LED_BUILTIN , OUTPUT );
5  Serial.begin(9600);
6}
7
8void  loop() {
9  // put your main code here, to run repeatedly:
10  if(Serial.available()  > 0)
11  {
12    datafromUser=Serial.read();
13  }
14
15  if(datafromUser ==  '1')
16  {
17    digitalWrite( LED_BUILTIN , HIGH );
18  }
19  else if(datafromUser  == '0')
20  {
21    digitalWrite( LED_BUILTIN, LOW);
22  }
23  
24}

1int datafromUser=0;
2void setup() {
3  // put your setup code here,
4  to run once:
5  pinMode( LED_BUILTIN , OUTPUT );
6  Serial.begin(9600);
7}
8
9void
10  loop() {
11  // put your main code here, to run repeatedly:
12  if(Serial.available()
13  > 0)
14  {
15    datafromUser=Serial.read();
16  }
17
18  if(datafromUser ==
19  '1')
20  {
21    digitalWrite( LED_BUILTIN , HIGH );
22  }
23  else if(datafromUser
24  == '0')
25  {
26    digitalWrite( LED_BUILTIN, LOW);
27  }
28  
29}

1import serial
2import time
3
4arduino=serial.Serial('COM1', 9600)
5time.sleep(2)
6
7print("Enter  1 to turn ON LED and 0 to turn OFF LED")
8
9while 1:
10    
11    datafromUser=input()
12
13    if datafromUser == '1':
14        arduino.write(b'1')
15        print("LED  turned ON")
16    elif datafromUser == '0':
17        arduino.write(b'0')
18        print("LED turned OFF")