pySerial 2.6: specify end-of-line in readline()

Question

I am sending commands to Eddie using pySerial. I need to specify a carriage-return in my readline, but pySerial 2.6 got rid of it... Is there a workaround?

Here are the Eddie command set is listed on the second and third pages of this PDF. Here is a backup image in the case where the PDF is inaccessible.

General command form:

Input:              <cmd>[<WS><param1>...<WS><paramN>]<CR>
Response (Success): [<param1>...<WS><paramN>]<CR>
Response (Failure): ERROR[<SP>-<SP><verbose_reason>]<CR> 

As you can see all responses end with a \r. I need to tell pySerial to stop.

What I have now:

def sendAndReceive(self, content):
  logger.info('Sending {0}'.format(content))
  self.ser.write(content + '\r')
  self.ser.flush();
  response = self.ser.readline() # Currently stops reading on timeout...
  if self.isErr(response):
    logger.error(response)
    return None
  else:
    return response

Answer 1

From pyserial 3.2.1 (default from debian Stretch) read_until is available. if you would like to change cartridge from default ('\n') to '\r', simply do:

import serial
ser=serial.Serial('COM5',9600)
ser.write(b'command\r')  # sending command
ser.read_until(b'\r')   # read until '\r' appears

b'\r' could be changed to whatever you will be using as carriadge return.

Answer 2

from pyserial's documentation:

(sic)

Note:

The eol parameter for readline() is no longer supported when pySerial is run with newer Python versions (V2.6+) where the module io is available. EOL

To specify the EOL character for readline() or to use universal newline mode, it is advised to use io.TextIOWrapper:

import serial
import io
ser = serial.serial_for_url('loop://', timeout=1)
sio = io.TextIOWrapper(io.BufferedRWPair(ser, ser))

sio.write(unicode("hello\n"))
sio.flush() # it is buffering. required to get the data out *now*
hello = sio.readline()
print hello == unicode("hello\n")

Answer 3

reading 10 data from port 3 with board rate 38400, The data is separated with \n character when comes in the incoming data

import serial as self
ser=self.Serial("COM3", 38400)  
buffer = []
count = 0.0
c = "\0"
while count < 10:
    c = "\0"
    if ser.inWaiting():
        while True:
            val = ser.read(1)
            if "\n" in val:
                break
            else:
                c += val
        buffer.append(c) # stores all data received into a list   
        count += 1
print buffer