code: def walk_dir_with_filter(pth, prefix=None, suffix=None):
      
      if suffix is None or type(suffix) != list:
          suffix = []
      if prefix is None or type(prefix) != list:
          prefix = []
  
      r = []
      for root_, dirs, files in os.walk(pth):
          for file_ in files:
              full_pth = os.path.join(root_, file_)
  
              # 排除 \.开头文件, 及 .pyc .md 结尾文件
              c = False
              for x in prefix:
                  if file_.startswith(x):
                      c = True
                      break
              if c:
                  continue
              # if runs here , c is False
              for x in suffix:
                  if file_.endswith(x):
                      c = True
                      break
              if c:
                  continue
  
              r.append(full_pth)
      return r
docs: 默认情况下,会遍历目录下所有文件,写入数组返回.
  
      - ``prefix`` 会过滤以 其开头的所有文件
      - ``suffix`` 结尾
  
      :param pth:
      :type pth:
      :param prefix:
      :type prefix:
      :param suffix:
      :type suffix:
      :return:
      :rtype: