_dagcircuit.py 文件源码

python
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项目:qiskit-sdk-py 作者: QISKit 项目源码 文件源码
def __init__(self):
        """Create an empty circuit."""
        # Map from a wire's name (reg,idx) to a Bool that is True if the
        # wire is a classical bit and False if the wire is a qubit.
        self.wire_type = {}

        # Map from wire names (reg,idx) to input nodes of the graph
        self.input_map = {}

        # Map from wire names (reg,idx) to output nodes of the graph
        self.output_map = {}

        # Running count of the total number of nodes
        self.node_counter = 0

        # Map of named operations in this circuit and their signatures.
        # The signature is an integer tuple (nq,nc,np) specifying the
        # number of input qubits, input bits, and real parameters.
        # The definition is external to the circuit object.
        self.basis = {}

        # Directed multigraph whose nodes are inputs, outputs, or operations.
        # Operation nodes have equal in- and out-degrees and carry
        # additional data about the operation, including the argument order
        # and parameter values.
        # Input nodes have out-degree 1 and output nodes have in-degree 1.
        # Edges carry wire labels (reg,idx) and each operation has
        # corresponding in- and out-edges with the same wire labels.
        self.multi_graph = nx.MultiDiGraph()

        # Map of qregs to sizes
        self.qregs = {}

        # Map of cregs to sizes
        self.cregs = {}

        # Map of user defined gates to ast nodes defining them
        self.gates = {}

        # Output precision for printing floats
        self.prec = 10
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