PySerial not stable

Using Arduino Interfacing w/ Software on the Computer
5

The python code reads the alert file off the server which always will exist. The Arduino code is printing parts of the string "sendVal" with the following code:

  if (length(tempC) < 3){
    //Serial.println("length 2"); 
    Serial.print(sendVal[0]); 
    Serial.print(sendVal[1]);
    Serial.println(sendVal[2]); 
   
  }
  
  else if (length(tempC) == 3){
    Serial.println("Length 3"); 
    Serial.println(tempC); 
  }