I have searched several questions and through google but could not find a solution. I am simply trying to send a float number from python3 with struct to arduino or if there is any other ways other than processing a char array at the arduino side because it is very slow in my opinion..

My arduino code:

void setup() {
  // initialize the serial communication:
  Serial.begin(9600);
}

void loop() {

  unsigned long t = millis();
  float x = analogRead(A3);
  float y = analogRead(A2);
  float c = Serial.read();
  Serial.println(c);
  //Serial.print(t/1000.0);
  //Serial.print(" , ");
  //Serial.print(x);
  //Serial.print(" , ");
  //Serial.println(y);

  
  
  // wait a bit for the analog-to-digital converter to stabilize after the last
  // reading:
  //delayMicroseconds(200);
  //delay(2);
  delay(250);
}

My python3 code :

import serial

import struct

arduino = serial.Serial('/dev/ttyACM0', 9600)
data = arduino.write(struct.pack('f', 111.32))
while True:
#    arduino.write(b"123")
    data = arduino.write(struct.pack('f', 111.32))

Getting the serial output as :

163.00
222.00
66.00
215.00
163.00
222.00
66.00
215.00
163.00
222.00
66.00
215.00
163.00

How can i solve my problem ?

EDIT : I changed the arduino code according to the answer the new arduino code is

float f;
void setup(){
  Serial.begin(9600);
}

void loop(){
  while(Serial.available() >= 3){

    f = Serial.read() << 24;
    f = ((unsigned long) f) | (Serial.read() << 16);
    f = ((unsigned long) f) | (Serial.read() << 8);
    f = ((unsigned long) f) | Serial.read();
    Serial.println(f);
  }
  Serial.println(f);
}

However, the output is now as such:

ovf
ovf
ovf
ovf
ovf
ovf
ovf
4294941184.00
4294941184.00
4294941184.00
4294941184.00
4294941184.00
4294941184.00
4294941184.00