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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def read(filename, attrs=None):
 """This will read any VTK file! It will figure out what reader to use then wrap the VTK object for use in ``vtki``. Parameters attrs : dict, optional A dictionary of attributes to call on the reader. Keys of dictionary are the attribute/method names and values are the arguments passed to those calls. If you do not have any attributes to call, pass ``None`` as the value. """

    filename = os.path.abspath(os.path.expanduser(filename))
    ext = get_ext(filename)

    # From the extension, decide which reader to use
    if attrs is not None:
        reader = get_reader(filename)
        return standard_reader_routine(reader, filename, attrs=attrs)
    elif ext in '.vti': # ImageData
        return vtki.UniformGrid(filename)
    elif ext in '.vtr': # RectilinearGrid
        return vtki.RectilinearGrid(filename)
    elif ext in '.vtu': # UnstructuredGrid
        return vtki.UnstructuredGrid(filename)
    elif ext in ['.ply', '.obj', '.stl']: # PolyData
        return vtki.PolyData(filename)
    elif ext in '.vts': # StructuredGrid
        return vtki.StructuredGrid(filename)
    elif ext in ['.vtm', '.vtmb']:
        return vtki.MultiBlock(filename)
    elif ext in ['.e', '.exo']:
        return read_exodus(filename)
    elif ext in ['.vtk']:
        # Attempt to use the legacy reader...
        return read_legacy(filename)
    else:
        # Attempt find a reader in the readers mapping
        try:
            reader = get_reader(filename)
            return standard_reader_routine(reader, filename)
        except KeyError:
            pass
    raise IOError("This file was not able to be automatically read by vtki.")