docs: def command(cls, command, stdin=None, shell=False):
          """ Runs specified command.
  
          The command can be fed with data on stdin with parameter ``stdin``.
          The command can also be treated as a shell command with parameter ``shell``.
          Please refer to subprocess.Popen on how does this stuff work
  
          :returns: Run() instance with resulting data
          """
          if not shell and isinstance(command, str):
              command = cls.shlex.split(command)
          collate_original = None
          try:
              collate_original = cls.os.environ['LC_ALL']
          except KeyError:
              pass
          cls.os.environ['LC_ALL'] = "C"  # Because of my czech locale, YUCK! :)
          try:
              process = cls.subprocess.Popen(command,
                                             stdout=cls.subprocess.PIPE,
                                             stderr=cls.subprocess.PIPE,
                                             stdin=cls.subprocess.PIPE,
                                             shell=shell)
              (stdout, stderr) = process.communicate(stdin)
          finally:
              if collate_original:
                  cls.os.environ['LC_ALL'] = collate_original
              else:
                  del cls.os.environ['LC_ALL']
          return cls(stdout, stderr, stdin, process.returncode, command)