parameters: (string)
return_statement: return re.findall(r"\d+", string)
docstring: convert shape string to list, internal use only
  
      Parameters
      ----------
      string: str
          shape string
  
      Returns
      -------
      list of str to represent shape
docstring_summary: convert shape string to list, internal use only
docstring_tokens: convert shape string to list internal use only
function: def _str2tuple(string):
      """convert shape string to list, internal use only
  
      Parameters
      ----------
      string: str
          shape string
  
      Returns
      -------
      list of str to represent shape
      """
      return re.findall(r"\d+", string)
function_tokens: def _str2tuple ( string ) : return re . findall ( r"\d+" , string )