The way to read data from the serial port and convert it to str

import serial ### pip install pyserial

ser = serial.Serial(read_com, com_band, timeout=3) # Open COM3, baud rate 9600, timeout 3 seconds
ser.flushInput() # Clear the buffer

while True:
try:
count = ser.inWaiting() # Get serial buffer data
if count != 0:

        recv_bytestream = ser.read(100) ##读取100个字节，格式为bytes

recv_bytestream = ser.read_all() ##Read all the data in a timeout period, the format is bytes

        print(time.time(), "recv_bytestream:", recv_bytestream)

        # bytes转为字符串方法
        recv_str = str(recv_bytestream, 'UTF-8')
        print(time.time(), "recv_str:", recv_str)
        
        ### 处理数据 ### 
        
except Exception as e:
    print("exception:", e)

finally:
    time.sleep(0.01)  # 延时0.01秒，免得CPU出问题

pass