fix_encoding.py 文件源码

def win_get_unicode_stream(stream, excepted_fileno, output_handle, encoding):
  """Returns a unicode-compatible stream.

  This function will return a direct-Console writing object only if:
  - the file number is the expected console file number
  - the handle the expected file handle
  - the 'real' handle is in fact a handle to a console.
  """
  old_fileno = getattr(stream, 'fileno', lambda: None)()
  if old_fileno == excepted_fileno:
    # These types are available on linux but not Mac.
    # pylint: disable=no-name-in-module,F0401
    from ctypes import windll, WINFUNCTYPE
    from ctypes.wintypes import DWORD, HANDLE

    # <http://msdn.microsoft.com/en-us/library/ms683231.aspx>
    GetStdHandle = WINFUNCTYPE(HANDLE, DWORD)(('GetStdHandle', windll.kernel32))

    real_output_handle = GetStdHandle(DWORD(output_handle))
    if win_handle_is_a_console(real_output_handle):
      # It's a console.
      return WinUnicodeConsoleOutput(
          real_output_handle, old_fileno, stream.name, encoding)

  # It's something else. Create an auto-encoding stream.
  return WinUnicodeOutput(stream, old_fileno, encoding)