code: def from_input(cls, input, workdir=None, manager=None):
          
          return cls(input, workdir=workdir, manager=manager)
docs: Create an instance of `AbinitTask` from an ABINIT input.
  
          Args:
              ainput: `AbinitInput` object.
              workdir: Path to the working directory.
              manager: :class:`TaskManager` object.