messing with this and node module.exports

index.js

pt = require('./thisy');

pt.printthis();

thisy.js

module.exports = {
  printthis: printy,
  foo: somefoofunc
};

function printy (){
  // if this file is called from within itself(uncomment line 12), this.foo is undefined
  this.foo();
  // if called from within itself, this is the global node process
  // if called outside, through an import, this referrs to the export object
  console.log(this);
}

// printy();

function somefoofunc (){
  console.log('in some foo func');
}