doc update

1 files changed, 11 insertions, 12 deletions

diff --git a/documentation/shortintro.rst b/documentation/shortintro.rst
index 6b0d81f..e08f737 100644
--- a/documentation/shortintro.rst
+++ b/documentation/shortintro.rst
@@ -5,25 +5,24 @@
 Opening serial ports
 ====================
 
-Open port 0 at "9600,8,N,1", no timeout::
+Open port at "9600,8,N,1", no timeout::
 
     >>> import serial
-    >>> ser = serial.Serial(0)  # open first serial port
+    >>> ser = serial.Serial('/dev/ttyUSB0')  # open serial port
     >>> print(ser.name)         # check which port was really used
     >>> ser.write(b"hello")     # write a string
     >>> ser.close()             # close port
 
 Open named port at "19200,8,N,1", 1s timeout::
 
-    >>> ser = serial.Serial('/dev/ttyS1', 19200, timeout=1)
-    >>> x = ser.read()          # read one byte
-    >>> s = ser.read(10)        # read up to ten bytes (timeout)
-    >>> line = ser.readline()   # read a '\n' terminated line
-    >>> ser.close()
+    >>> with serial.Serial('/dev/ttyS1', 19200, timeout=1) as ser:
+    ...     x = ser.read()          # read one byte
+    ...     s = ser.read(10)        # read up to ten bytes (timeout)
+    ...     line = ser.readline()   # read a '\n' terminated line
 
-Open second port at "38400,8,E,1", non blocking HW handshaking::
+Open port at "38400,8,E,1", non blocking HW handshaking::
 
-    >>> ser = serial.Serial(1, 38400, timeout=0,
+    >>> ser = serial.Serial('COM3', 38400, timeout=0,
     ...                     parity=serial.PARITY_EVEN, rtscts=1)
     >>> s = ser.read(100)       # read up to one hundred bytes
     ...                         # or as much is in the buffer
@@ -35,14 +34,14 @@ Get a Serial instance and configure/open it later::
 
     >>> ser = serial.Serial()
     >>> ser.baudrate = 19200
-    >>> ser.port = 0
+    >>> ser.port = 'COM1'
     >>> ser
     Serial<id=0xa81c10, open=False>(port='COM1', baudrate=19200, bytesize=8, parity='N', stopbits=1, timeout=None, xonxoff=0, rtscts=0)
     >>> ser.open()
-    >>> ser.isOpen()
+    >>> ser.is_open
     True
     >>> ser.close()
-    >>> ser.isOpen()
+    >>> ser.is_open
     False
 
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