fix deprecation warnings

montydb/base.py

@@ -18,11 +18,12 @@
 # Assembling crucial classes and functions form pymongo module,
 # some of them may modified by needs.
 
+try:
+    from collections.abc import MutableMapping
+except ImportError:
+    from collections import MutableMapping
 
-from collections import (
-    OrderedDict,
-    MutableMapping,
-)
+from collections import OrderedDict
 from .types import (
     abc,
     iteritems,

montydb/client.py

@@ -128,9 +128,9 @@ def get_database(self, name):
         """
         # verify database name
         if platform.system() == "Windows":
-            is_invaild = set('/\. "$*<>:|?').intersection(set(name))
+            is_invaild = set(r'/\. "$*<>:|?').intersection(set(name))
         else:
-            is_invaild = set('/\. "$').intersection(set(name))
+            is_invaild = set(r'/\. "$').intersection(set(name))
 
         if is_invaild or not name:
             raise errors.OperationFailure("Invaild database name.")

montydb/engine/queries.py

@@ -2,7 +2,10 @@
 import re
 from copy import deepcopy
 from datetime import datetime
-from collections import Mapping
+try:
+    from collections.abc import MutableMapping
+except ImportError:
+    from collections import MutableMapping
 
 from ..errors import OperationFailure
 

montydb/engine/weighted.py

@@ -1,6 +1,9 @@
 
 from datetime import datetime
-from collections import Mapping
+try:
+    from collections.abc import Mapping
+except ImportError:
+    from collections import Mapping
 
 from ..types import (
     integer_types,

montydb/utils/io.py

@@ -210,7 +210,7 @@ class MongoQueryRecorder(object):
 
     def __init__(self, mongodb, namespace=None, user=None):
         self._mongodb = mongodb
-        self._namespace = namespace or {"$regex": mongodb.name + "\..*"}
+        self._namespace = namespace or {"$regex": mongodb.name + r"\..*"}
         self._user = user
 
         self._epoch = datetime(1970, 1, 1)