class_docstr: Reader class for a scp file of numpy file.
  
  Examples:
      key1 /some/path/a.npy
      key2 /some/path/b.npy
      key3 /some/path/c.npy
      key4 /some/path/d.npy
      ...
  
      >>> reader = NpyScpReader('npy.scp')
      >>> array = reader['key1']
code: def __contains__(self, item):
      return item
  
imports: import collections.abc
  from pathlib import Path
  from typing import Union
  import numpy
  from typeguard import check_argument_types
  from espnet2.fileio.read_text import read_2columns_text
label_desc: Use image node_id 4 for calling the NpyScpReader obj's underlying member method code with example usage: obj.__contains__(item) and returns: item