Unable to build XDot examples

Hi Sachin,

I run “pip install -r requirements.txt” to satisfy, but it says it is already satisfied

hmm, In that case, I recommend to use virtualenv.

# install
C:\> python3 -m pip install virtualenv
# setup
C:\Users\user1> python3 -m virtualenv py3env
#activate
C:\Users\user1> C:\Users\user1\py3env\Scripts\activate.bat

And then, you can install mbed-cli and other python modules.

python3 -m pip install mbed-cli
python3 -m pip install -r mbed-os/requrements.txt

Thanks,
Toyo