code: def inspect(self, mrf=True):
          
          self.packer_cmd = self.packer.inspect
  
          self._add_opt('-machine-readable' if mrf else None)
          self._add_opt(self.packerfile)
  
          result = self.packer_cmd()
          if mrf:
              result.parsed_output = self._parse_inspection_output(
                                                          result.stdout.decode())
          else:
              result.parsed_output = None
          return result
docs: Inspects a Packer Templates file (`packer inspect -machine-readable`)
  
          To return the output in a readable form, the `-machine-readable` flag
          is appended automatically, afterwhich the output is parsed and returned
          as a dict of the following format:
            "variables": [
              {
                "name": "aws_access_key",
                "value": "{{env `AWS_ACCESS_KEY_ID`}}"
              },
              {
                "name": "aws_secret_key",
                "value": "{{env `AWS_ACCESS_KEY`}}"
              }
            ],
            "provisioners": [
              {
                "type": "shell"
              }
            ],
            "builders": [
              {
                "type": "amazon-ebs",
                "name": "amazon"
              }
            ]
  
          :param bool mrf: output in machine-readable form.