code: def create_stft_input_shape(window_size):
      return (2, window_size * 10)
  
file_path: nnabla/python/test/function/test_stft.py
imports: import pytest
  import numpy
  import nnabla
  import nnabla.functions
  import librosa
  from nbla_test_utils import list_context
label_desc: Use image node_id 5 for calling a global function with example usage: create_stft_input_shape(window_size) and returns: int,  unknown