code: def mkdir(*args):
      
      path = ''
      for chunk in args:
          path = os.path.join(path, chunk)
          if not os.path.isdir(path):
              os.mkdir(path)
      return path
docs: Create a directory specified by a sequence of subdirectories
  
      >>> mkdir("/tmp", "foo", "bar", "baz")
      '/tmp/foo/bar/baz'
      >>> os.path.isdir('/tmp/foo/bar/baz')
      True