code: def transform(window, transform):
      """Construct an affine transform matrix relative to a window.
  
      Parameters
      ----------
      window: Window
          The input window.
      transform: Affine
          an affine transform matrix.
  
      Returns
      -------
      Affine
          The affine transform matrix for the given window
  
      """
      window = evaluate(window, height=0, width=0)
      x, y = transform * (window.col_off or 0.0, window.row_off or 0.0)
      return (
          Affine.translation(x - transform.c, y - transform.f)
          * transform
      )
  
imports: import collections
  from collections.abc import Iterable
  import functools
  import math
  import warnings
  from affine import Affine
  import attr
  import numpy
  from rasterio.errors import WindowError, RasterioDeprecationWarning
  from rasterio.transform import rowcol, guard_transform
label_desc: Use image node_id 12 for calling a global function with example usage: transform(window, transform) and returns: unknown