code: def im():
      """Create image arr for masking"""
      arr = np.array([[0, 1, 2], [3, 4, 5]])
      return arr
  
file_path: earthpy/earthpy/tests/test_mask.py
imports: import numpy
  from earthpy.mask import mask_pixels
  import pytest
label_desc: Use image node_id 1 for calling a global function with example usage: im() and returns: arr