class_docstr: Test getting and setting global print options.
class_docstr_tok: ["Test","getting","and","setting","global","print","options","."]
code: def test_formatter(self):
      x = np.arange(3)
      np.set_printoptions(formatter={"all": lambda x: str(x - 1)})
      assert_equal(repr(x), "array([-1, 0, 1])")
  
imports: import sys
  import gc
  from hypothesis import given
  from hypothesis.extra import numpy
  import pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_raises, assert_warns, HAS_REFCOUNT, assert_raises_regex
  from numpy.core.arrayprint import _typelessdata
  import textwrap
label_desc: Use image node_id 5 for calling the TestPrintOptions obj's underlying member method code with example usage: obj.test_formatter() without return types