[Python] Serial communication from arduino to Linux terminal

I have been trying to print the serial output from the Arduino to the Linux terminal but the output sent to the terminal seems to be empty with string as shown in the figure below

void setup() {
Serial.begin(9600);

void loop() {
float zby = 4.54;
Serial.println(zby);
delay(1000);
}




I have tried using Raspberry Pi so I connected the Arduino to the raspberry and did the same thing but at least i found something received The ports that i have used

The Arduino code and terminal output

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