renamed misc_util.cpp -> nodes.cpp and created _extensions.py file

Author: Kishan-Ved

pydatastructs/utils/__init__.py

@@ -2,6 +2,7 @@
 
 from . import misc_util
 from . import testing_util
+from . import _extensions
 from .misc_util import (
     TreeNode,
     MAryTreeNode,

pydatastructs/utils/_backend/cpp/misc_util.cpp renamed to pydatastructs/utils/_backend/cpp/nodes.cpp

@@ -0,0 +1,17 @@
+from setuptools import Extension
+
+project = 'pydatastructs'
+
+module = 'utils'
+
+backend = '_backend'
+
+cpp = 'cpp'
+
+nodes = '.'.join([project, module, backend, cpp, '_nodes'])
+nodes_sources = ['/'.join([project, module, backend, cpp,
+                            'nodes.cpp'])]
+
+extensions = [
+    Extension(nodes, sources=nodes_sources)
+]