code: def pystdlib():
      
      curver = '.'.join(str(x) for x in sys.version_info[:2])
      return (set(stdlib_list.stdlib_list(curver)) | {
          '_LWPCookieJar', '_MozillaCookieJar', '_abcoll', 'email._parseaddr',
          'email.base64mime', 'email.feedparser', 'email.quoprimime',
          'encodings', 'genericpath', 'ntpath', 'nturl2path', 'os2emxpath',
          'posixpath', 'sre_compile', 'sre_parse', 'unittest.case',
          'unittest.loader', 'unittest.main', 'unittest.result',
          'unittest.runner', 'unittest.signals', 'unittest.suite',
          'unittest.util', '_threading_local', 'sre_constants', 'strop',
          'repr', 'opcode', 'nt', 'encodings.aliases',
          '_bisect', '_codecs', '_collections', '_functools', '_hashlib',
          '_heapq', '_io', '_locale', '_LWPCookieJar', '_md5',
          '_MozillaCookieJar', '_random', '_sha', '_sha256', '_sha512',
          '_socket', '_sre', '_ssl', '_struct', '_subprocess',
          '_threading_local', '_warnings', '_weakref', '_weakrefset',
          '_winreg'
      }) - {'__main__'}
docs: Return a set of all module-names in the Python standard library.