class_docstr: This class abstracts handling of version specifiers.
  
  .. tip::
  
      It is generally not required to instantiate this manually. You should instead
      prefer to work with :class:`SpecifierSet` instead, which can parse
      comma-separated version specifiers (which is what package metadata contains).
code: def _compare_not_equal(self, prospective: Version, spec: str) -> bool:
      return not self._compare_equal(prospective, spec)
  
imports: import abc
  import itertools
  import re
  from typing import Callable, Iterable, Iterator, List, Optional, Set, Tuple, TypeVar, Union
  from .utils import canonicalize_version
  from .version import Version
label_desc: Use image node_id 14 for calling the Specifier obj's underlying member method code with example usage: obj._compare_not_equal(prospective, spec) and returns: unknown