python: example: Update README.md with socat link option

Signed-off-by: Siddharth Chandrasekaran <[email protected]>

examples/python/README.md

@@ -4,6 +4,7 @@ To run the samples, you have to install the following python package:
 
 ```sh
 python3 -m pip install pyserial
+python3 -m pip install ../../python
 ```
 
 Then you can run start the CP/PD service as,
@@ -21,10 +22,13 @@ ask socat to create a pair of psudo terminal devices that are connected to each
 other. To do this run:
 
 ```sh
-socat -d -d pty,raw,echo=0,nonblock pty,raw,echo=0,nonblock
+socat pty,raw,echo=0,nonblock,link=/tmp/ttyS0 pty,raw,echo=0,nonblock,link=/tmp/ttyS1
 ```
 
-The output of the above socat invocation should show two pts devices of the
-format `/dev/pts/<N>`, where `N` is the number of the device. Then in two other
-terminals, you can can start the CP and PD app as shown above but with the pts
-devices produced by socat (the baudrate option can be omitted).
+While the above command is running, you can use `/tmp/ttyS0` and `/tmp/ttyS1` to
+start your CP and PD app as,
+
+```
+./cp_app.py /tmp/ttyS0
+./pd_app.py /tmp/ttyS1
+```