version bump; decompose vag into vags and utils

Author: refraction-ray

examples/mcnoise_check.py

@@ -2,6 +2,9 @@
 
 os.environ["CUDA_VISIBLE_DEVICES"] = "-1"
 # cpu is fast for small scale circuit simulation
+import sys
+
+sys.path.insert(0, "../")
 
 from tqdm import tqdm
 import tensorcircuit as tc

tensorcircuit/__init__.py

@@ -1,4 +1,4 @@
-__version__ = "0.0.211109"
+__version__ = "0.0.211117"
 __author__ = "refraction-ray"
 
 from .cons import (

tensorcircuit/applications/layers.py

@@ -1,24 +1,28 @@
 """
 module for functions adding layers of circuits
 """
-
-import sys
 import itertools
+import logging
+import sys
 from typing import Sequence, Union, Any, Optional, Tuple, List
 
 import numpy as np
-import cirq
 import tensorflow as tf
 
 from ..circuit import Circuit
 from ..densitymatrix import DMCircuit
 from ..gates import num_to_tensor, array_to_tensor, _swap_matrix
 from ..channels import depolarizingchannel
 
+logger = logging.getLogger(__name__)
+
 try:
     import networkx as nx
+    import cirq
 except ImportError as e:
-    print(e)
+    logger.warning(e)
+    logger.warning("Therefore some functionality in %s may not work" % __name__)
+
 
 thismodule = sys.modules[__name__]