code: def pad(array, transform, pad_width, mode=None, **kwargs):
      """pad array and adjust affine transform matrix.
  
      Parameters
      ----------
      array: numpy.ndarray
          Numpy ndarray, for best results a 2D array
      transform: Affine transform
          transform object mapping pixel space to coordinates
      pad_width: int
          number of pixels to pad array on all four
      mode: str or function
          define the method for determining padded values
  
      Returns
      -------
      (array, transform): tuple
          Tuple of new array and affine transform
  
      Notes
      -----
      See :func:`numpy.pad` for details on mode and other kwargs.
      """
      import numpy as np
  
      transform = guard_transform(transform)
      padded_array = np.pad(array, pad_width, mode, **kwargs)
      padded_trans = list(transform)
      padded_trans[2] -= pad_width * padded_trans[0]
      padded_trans[5] -= pad_width * padded_trans[4]
      return padded_array, Affine(*padded_trans[:6])
  
imports: from collections import namedtuple
  from contextlib import ExitStack
  import glob
  import logging
  from logging import NullHandler
  import os
  import platform
  import warnings
  from rasterio._vsiopener import _opener_registration
  from rasterio._show_versions import show_versions
  from rasterio._version import gdal_version, get_geos_version, get_proj_version
  from rasterio.crs import CRS
  from rasterio.drivers import driver_from_extension, is_blacklisted
  from rasterio.dtypes import bool_, ubyte, sbyte, uint8, int8, uint16, int16, uint32, int32, int64, uint64, float32, float64, complex_, check_dtype, complex_int16
  from rasterio.env import ensure_env_with_credentials, Env
  from rasterio.errors import RasterioIOError, DriverCapabilityError, RasterioDeprecationWarning
  from rasterio.io import DatasetReader, get_writer_for_path, get_writer_for_driver, MemoryFile
  from rasterio.profiles import default_gtiff_profile
  from rasterio.transform import Affine, guard_transform
  from rasterio._path import _parse_path, _UnparsedPath
  import rasterio._err
  import rasterio.coords
  import rasterio.enums
  import rasterio._path
label_desc: Use image node_id 4 for calling a global function with example usage: pad(array, transform, pad_width, mode) and returns: padded_array,  Affine