serial communication python

1//python
2
3import serial
4
5port = serial.Serial('COM5',9600)
6
7while( port.isOpen()):
8    comdata = int(input())
9
10    if(comdata == 1):
11        port.write(str.encode('1'))
12    elif(comdata == 2):
13        port.write(str.encode('2'))
14
15    elif (comdata == 3):
16        port.write(str.encode('3'))
17    elif (comdata == 4):
18        port.write(str.encode('4'))
19
20    elif (comdata == 5):
21        port.write(str.encode('5'))
22    elif (comdata == 6):
23        port.write(str.encode('6'))
24
25    elif (comdata == 7):
26        port.write(str.encode('7'))
27    elif (comdata == 8):
28        port.write(str.encode('8'))
29
30    else:
31        print('Invalid input!!!!')
32        
33// arduino
34
35const int LED1 = 8;
36const int LED2 = 9;
37const int LED3 = 10;
38const int LED4 = 11;
39char comdata;
40
41void setup() {
42
43  pinMode(LED1, OUTPUT);
44  pinMode(LED2, OUTPUT);
45  pinMode(LED3, OUTPUT);
46  pinMode(LED4, OUTPUT);
47  Serial.begin(9600);
48}
49
50void loop() {
51
52  if (Serial.available() > 0) {
53      comdata =(Serial.read());
54      
55    if (comdata == '1') {
56      Serial.println("LED1 is ON");
57      digitalWrite(LED1, HIGH);
58    }  
59    else if (comdata == '2') {
60      Serial.println("LED1 is OFF");
61      digitalWrite(LED1, LOW);
62    }
63    
64    
65    else if (comdata == '3' ) {
66      Serial.println("LED2 is ON");
67      digitalWrite(LED2, HIGH);
68    }
69    else if (comdata == '4' ) {
70      Serial.println("LED2 is OFF");
71      digitalWrite(LED2, LOW);
72    }
73    
74    else if (comdata == '5') {
75      Serial.println("LED3 is ON");
76      digitalWrite(LED3, HIGH);
77    }
78    else if (comdata == '6') {
79      Serial.println("LED3 is OFF");
80      digitalWrite(LED3, LOW);
81    }
82    
83    else if (comdata == '7') {
84      Serial.println("LED4 is ON");
85      digitalWrite(LED4, HIGH);
86    }
87    
88    else if (comdata == '8') {
89      Serial.println("LED4 is OFF");
90      digitalWrite(LED4, LOW);}
91
92
93    
94  }
95}
96
97