text: import sublime
  import sys
  
  from lint import Linter
  from sublimelint.lint.util import which
  
  class Python(Linter):
      language = 'python'
      cmd = 'pyflakes'
      regex = r'^.+:(?P<line>\d+):\s*(?P<error>.+)'
  
      def run(self, cmd, code):
          python3 = False
          if (self.filename or '').startswith(sublime.packages_path()):
              if sys.version_info >= (3, 0):
                  python3 = True
  
          first_line = code.split('\n', 1)[0]
          if first_line.startswith('#!') and 'python3' in first_line:
              python3 = True
  
          if python3 and which('python3'):
              # python 3
              pyflakes = which('pyflakes')
              cmd = ('python3', pyflakes)
              return self.communicate(cmd, code)
          else:
              return self.communicate(cmd, code)
  