parameters: (self, devfile="/dev/ttyS0", baudrate=9600, bytesize=8, timeout=1)
docstring: @param devfile  : Device file under dev filesystem
          @param baudrate : Baud rate for serial transmission
          @param bytesize : Serial buffer size
          @param timeout  : Read/Write timeout
function: def __init__(self, devfile="/dev/ttyS0", baudrate=9600, bytesize=8, timeout=1):
          """
          @param devfile  : Device file under dev filesystem
          @param baudrate : Baud rate for serial transmission
          @param bytesize : Serial buffer size
          @param timeout  : Read/Write timeout
          """
          self.devfile  = devfile
          self.baudrate = baudrate
          self.bytesize = bytesize
          self.timeout  = timeout
          self.open()
function_tokens: def __init__ ( self , devfile = "/dev/ttyS0" , baudrate = 9600 , bytesize = 8 , timeout = 1 ) : self . devfile = devfile self . baudrate = baudrate self . bytesize = bytesize self . timeout = timeout self . open ( )