> ## Documentation Index > Fetch the complete documentation index at: https://site.aspect.build/llms.txt > Use this file to discover all available pages before exploring further. # Writable `function` **Writable.close**

        
          def Writable.close() -> None

Closes this output stream. This drops the underlying handle, and subsequent writes will fail with "stream is closed". `function` **Writable.flush**

        
          def Writable.flush() -> None

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination. `function` **Writable.write**

        
          def Writable.write(
          buf: typing.Any,
          /
          ) -> int

Writes a buffer into this writer, returning how many bytes were written. `property` **Writable.is\_tty**

        
          Writable.is\_tty: bool

Returns true if the underlying stream is connected to a terminal/tty.