class_docstr: Perform approximate comparisons where the expected value is a mapping with
  numeric values (the keys can be anything).
class_docstr_tok: ["Perform","approximate","comparisons","where","the","expected","value","is","a","mapping","with","numeric","values","(","the","keys","can","be","anything",")","."]
code: def _check_type(self):
      __tracebackhide__ = True
      for key, value in self.expected.items():
          if isinstance(value, type(self.expected)):
              msg = "pytest.approx() does not support nested dictionaries: key={!r} value={!r}\n  full mapping={}"
              raise TypeError(
                  msg.format(key, value, pprint.pformat(self.expected))
              )
          elif not isinstance(value, Number):
              raise _non_numeric_type_error(
                  self.expected, at="key={!r}".format(key)
              )
  
imports: from __future__ import absolute_import
  import math
  import pprint
  import sys
  import warnings
  from decimal import Decimal
  from numbers import Number
  from more_itertools.more import always_iterable
  from six.moves import filterfalse
  from six.moves import zip
  import _pytest._code
  from _pytest import deprecated
  from _pytest.compat import isclass
  from _pytest.compat import Iterable
  from _pytest.compat import Mapping
  from _pytest.compat import Sized
  from _pytest.compat import STRING_TYPES
  from _pytest.outcomes import fail
label_desc: Use image node_id 4 for calling the ApproxMapping obj's underlying member method code with example usage: obj._check_type() without return types