def cmodule_key_(self, fgraph, no_recycling, compile_args=None,
                     libraries=None, header_dirs=None, insert_config_md5=True,
                     c_compiler=None):
        """
        Do the actual computation of cmodule_key in a static method
        to allow it to be reused in scalar.Composite.__eq__.

        """
        if compile_args is None:
            compile_args = []
        if libraries is None:
            libraries = []
        if header_dirs is None:
            header_dirs = []
        order = self.schedule(fgraph)
        # set of variables that have been computed by nodes we have
        # seen 'so far' in the loop below
        fgraph_computed_set = set()
        fgraph_inputs_dict = dict((i, (-1, pos)) for pos, i in
                                  enumerate(fgraph.inputs))
        constant_ids = dict()
        op_pos = {}  # Apply -> topological position

        # First we put the header, compile_args, library names and config md5
        # into the signature.
        sig = ['CLinker.cmodule_key']  # will be cast to tuple on return
        if compile_args is not None:
            # We must sort it as the order from a set is not guaranteed.
            # In  particular, 2 sets with the same content can give different
            # order depending on the order you put data in it.
            # Sets are used to remove duplicate elements.
            args = sorted(compile_args)
            args = tuple(args)
            sig.append(args)
        if libraries is not None:
            # see comments for compile_args
            args = sorted(libraries)
            args = tuple(args)
            sig.append(args)

        if header_dirs is not None:
            args = sorted(header_dirs)
            args = tuple(args)
            sig.append(args)

        # We must always add the numpy ABI version here as
        # DynamicModule always add the include <numpy/arrayobject.h>
        sig.append('NPY_ABI_VERSION=0x%X' %
                   numpy.core.multiarray._get_ndarray_c_version())
        if c_compiler:
            sig.append('c_compiler_str=' + c_compiler.version_str())

        # IMPORTANT: The 'md5' prefix is used to isolate the compilation
        # parameters from the rest of the key. If you want to add more key
        # elements, they should be before this md5 hash if and only if they
        # can lead to a different compiled file with the same source code.
        if insert_config_md5:
            sig.append('md5:' + theano.configparser.get_config_md5())
        else:
            sig.append('md5: <omitted>')

        error_on_play = [False]

        def in_sig(i, topological_pos, i_idx):
            # assert that every input to every node is one of'
            # - an fgraph input
            # - an output from a node in the FunctionGraph
            # - a Constant

            # It is important that a variable (i)
            # yield a 'position' that reflects its role in code_gen()
            if isinstance(i, graph.Constant):  # orphans
                if id(i) not in constant_ids:
                    isig = (i.signature(), topological_pos, i_idx)
                    # If the Theano constant provides a strong hash
                    # (no collision for transpose, 2, 1, 0, -1, -2,
                    # 2 element swapped...) we put this hash in the signature
                    # instead of the value. This makes the key file much
                    # smaller for big constant arrays. Before this, we saw key
                    # files up to 80M.
                    if hasattr(isig[0], "theano_hash"):
                        isig = (isig[0].theano_hash(), topological_pos, i_idx)
                    try:
                        hash(isig)
                    except Exception:
                        # generic constants don't have a hashable signature
                        error_on_play[0] = True
                        return None
                    constant_ids[id(i)] = isig
                else:
                    isig = constant_ids[id(i)]
                # print 'SIGNATURE', i.signature()
                # return i.signature()
            elif i in fgraph_inputs_dict:  # inputs
                isig = fgraph_inputs_dict[i]
            else:
                if i.owner is None:
                    assert all(all(out is not None for out in o.outputs)
                               for o in order)
                    assert all(input.owner is None for input in fgraph.inputs)
                    raise Exception('what is this?', (i, type(i), i.clients,
                                                      fgraph))

                if i in fgraph.outputs:
                    isig = (op_pos[i.owner],  # outputs
                            i.owner.outputs.index(i),
                            fgraph.outputs.index(i))
                else:
                    isig = (op_pos[i.owner], i.owner.outputs.index(i))  # temps
            return (isig, i in no_recycling)

        version = []
        for node_pos, node in enumerate(order):
            try:
                # Pure Ops do not have a c_code_cache_version_apply ...
                version.append(node.op.c_code_cache_version_apply(node))
            except __HOLE__:
                pass
            for i in node.inputs:
                version.append(i.type.c_code_cache_version())
            for o in node.outputs:
                version.append(o.type.c_code_cache_version())

            # add the signature for this node
            sig.append((
                node.op,
                tuple((i.type, in_sig(i, node_pos, ipos))
                      for ipos, i in enumerate(node.inputs)),
                (1,  # Increment if cmodule change its handling of outputs
                    tuple(o in no_recycling for o in node.outputs))))

            if error_on_play[0]:
                # if one of the signatures is not hashable
                # then bypass the cache mechanism and
                # compile fresh every time
                return None

            op_pos[node] = node_pos
            fgraph_computed_set.update(node.outputs)

        # Add not used input in the key
        # If inputs don't define a 'clients' attribute (as is the case if
        # fgraph is not a real FunctionGraph but a FakeFunctionGraph, a
        # lightweight class designed to imitate FunctionGraph), pretend they
        # have none. This if fine because the goal is only to have all of the
        # graph's information used to compute the key. If we mistakenly
        # pretend that inputs with clients don't have any, were are only using
        # those inputs more than once to compute the key.
        for ipos, var in [(i, var) for i, var in enumerate(fgraph.inputs)
                          if not len(getattr(var, 'clients', []))]:
            sig.append((var.type, in_sig(var, -1, ipos)))

        # crystalize the signature and version
        sig = tuple(sig)
        version = tuple(version)
        for v in version:
            if not v:
                # one of the ops or types here is unversioned,
                # so this fgraph is entirely unversioned
                return ((), sig)
        return version, sig
dataset/ETHPy150Open rizar/attention-lvcsr/libs/Theano/theano/gof/cc.py/CLinker.cmodule_key_