code: def execute(cls, executable, *arguments, **kwargs):
          
  
          echo = kwargs.pop('echo', False)
          return cls(ProcessChannel(executable, *arguments, **kwargs), echo=echo)
docs: execute(executable, argument..., redirect_stderr=False, echo=False):
  
          Set up a :class:`ProcessChannel` and create a :class:`Flow` instance
          for it.
  
          Args:
              executable(str): The executable to start.
              argument...(list of str): The arguments to pass to the executable.
              redirect_stderr(bool): Whether to also capture the output of stderr.
              echo(bool): Whether to echo read/written data to stdout by default.
  
          Returns:
              :class:`Flow`: A Flow instance initialised with the process
                  channel.