code: def check(self, mode, c=None):
      if not c:
          c = self.color(mode)
  
      # check putpixel
      im = Image.new(mode, (1, 1), None)
      im.putpixel((0, 0), c)
      assert (
          im.getpixel((0, 0)) == c
      ), f"put/getpixel roundtrip failed for mode {mode}, color {c}"
  
      # check putpixel negative index
      im.putpixel((-1, -1), c)
      assert (
          im.getpixel((-1, -1)) == c
      ), f"put/getpixel roundtrip negative index failed for mode {mode}, color {c}"
  
      # Check 0
      im = Image.new(mode, (0, 0), None)
      with pytest.raises(IndexError):
          im.putpixel((0, 0), c)
      with pytest.raises(IndexError):
          im.getpixel((0, 0))
      # Check 0 negative index
      with pytest.raises(IndexError):
          im.putpixel((-1, -1), c)
      with pytest.raises(IndexError):
          im.getpixel((-1, -1))
  
      # check initial color
      im = Image.new(mode, (1, 1), c)
      assert (
          im.getpixel((0, 0)) == c
      ), f"initial color failed for mode {mode}, color {c} "
      # check initial color negative index
      assert (
          im.getpixel((-1, -1)) == c
      ), f"initial color failed with negative index for mode {mode}, color {c} "
  
      # Check 0
      im = Image.new(mode, (0, 0), c)
      with pytest.raises(IndexError):
          im.getpixel((0, 0))
      # Check 0 negative index
      with pytest.raises(IndexError):
          im.getpixel((-1, -1))
  
imports: import ctypes
  import os
  import subprocess
  import sys
  import sysconfig
  import pytest
  from setuptools.command.build_ext import new_compiler
  from PIL import Image
  from .helper import assert_image_equal, hopper, is_win32, on_ci
label_desc: Use image node_id 2 for calling the TestImageGetPixel obj's underlying member method code with example usage: obj.check(mode, c) without return types