class_docstr: Based on LockFile / UnlockFile from win32 API
  https://msdn.microsoft.com/en-us/library/windows/desktop/aa365202(v=vs.85).aspx
class_docstr_tok: ["Based","on","LockFile","\/","UnlockFile","from","win32","API","https",":","\/\/msdn.microsoft.com\/en-us\/library\/windows\/desktop\/aa365202","(","v=vs.85",")",".aspx"]
code: def release(self):
      if self._lock:
          library.python.windows.unlock_file(
              self._lock, 0, self._LOCKED_BYTES_NUM, raises=False
          )
          self._lock.close()
          self._lock = None
  
imports: import errno
  import logging
  import os
  import sys
  import library.python.windows
label_desc: Use image node_id 3 for calling the _WinFileLock obj's underlying member method code with example usage: obj.release() without return types