Upgrading from 2 to 3 and having file write problems

[KenHorse]

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61

#!/usr/bin/python   import serial, time, sys, fileinput    #open and configure serial port ser = serial.Serial(     port='/dev/ttyUSB0',     baudrate=19200,     parity=serial.PARITY_NONE,     stopbits=serial.STOPBITS_ONE,     bytesize=serial.EIGHTBITS,     timeout = .1    )   #first, clear out buffer count = 0 while (count < 3):  count +=1   ser.write("\r".encode())    time.sleep(.1)   #open file for download file = open("download.mem", "w+")   #send command to start download ser.write("1SendEram\r\n".encode())   indata ="" Counter = 0 progresscounter = 0 var = 1   while var==1:   indata = ser.readline() # print indata   if indata[0] =="C": #check for first character of "Complete" and exit loop     break   if(len(indata) == 0 or indata[0] =="-" or indata[0] == "+" or indata[0] =="T"):     Counter = Counter + 1     else:     Counter = 0     ser.write("\r".encode())     file.write(indata)     #LineCount -= 1     progresscounter += 1     progress = progresscounter / 44     if( progress > 100 ) : progress = 100     ser.write("OK\r\n")           print( '\rDownloading: %s (%d%%)' % ("|"*(progress/2), progress)),     sys.stdout.flush()       if Counter > 10:     file.close()     sys.exit("Unit did not respond. Exiting")       print ("\nDownload Complete")      file.close() sys.exit()

The above code was originally written for Python2.7 and I am upgrading to Python3. I'm slowly working my way down the file (I've corrected various errors as I work my way down) but I'm stuck at the line "file.write(indata)". indata is read from the serial port and I want to write it to the file (download.mem). Python3 throws "TypeError: write() argument must be str, not bytes". This is the file.write statement on line 44

I'm not a total newbie to Python but I kinda am to Python3. I don't see how to cast "indata" as a string so it will write to the file

[Axel_Erfurt]

try

file.write(indata.decode())

[KenHorse]

try

file.write(indata.decode())

Thank you, that worked!