expo install fails

I am starting on react native, hence my questions may be very mundane in nature, but I could not find any similar topic

I tried doing npm install -g expo-cli in the command line
my node is 9.5 and npm is 5.6 my python --version is 3.7.0b3

I get an error while expo install happening that
python.EXE could not be found in C:\Program Files\Python37 where as i see that python.exe is present in that path, hence next command expo never exists and i am stuck ! whats the issue ?

Hey @jagatnibas,

Could you try upgrading to a Node 10+ version?

Cheers,
Adam