[MO] Add check for Python version to NetworkX dependency (#9226)

* Add check for python version to networkx dependency

* Update condition, task CVS-72806

* Update check to not break old Python versions support

* Update POT NetworkX dependency

* Allign requirements list format with setuptools documentation

tools/mo/requirements.txt

@@ -1,7 +1,8 @@
 tensorflow~=2.5.0
 mxnet~=1.2.0; sys_platform == 'win32'
 mxnet~=1.7.0.post2; sys_platform != 'win32'
-networkx~=2.5
+networkx~=2.5; python_version <= "3.6"
+networkx~=2.6; python_version > "3.6"
 numpy>=1.16.6,<1.20
 protobuf>=3.15.6
 onnx>=1.8.1

tools/mo/requirements_caffe.txt

@@ -1,4 +1,5 @@
-networkx~=2.5
+networkx~=2.5; python_version <= "3.6"
+networkx~=2.6; python_version > "3.6"
 numpy>=1.16.6,<1.20
 protobuf>=3.15.6
 defusedxml>=0.7.1

tools/mo/requirements_kaldi.txt

@@ -1,4 +1,5 @@
-networkx~=2.5
+networkx~=2.5; python_version <= "3.6"
+networkx~=2.6; python_version > "3.6"
 numpy>=1.16.6,<1.20
 defusedxml>=0.7.1
 requests>=2.25.1

tools/mo/requirements_mxnet.txt

@@ -1,6 +1,7 @@
 mxnet~=1.2.0; sys_platform == 'win32'
 mxnet~=1.7.0.post2; sys_platform != 'win32'
-networkx~=2.5
+networkx~=2.5; python_version <= "3.6"
+networkx~=2.6; python_version > "3.6"
 numpy>=1.16.6,<1.20
 defusedxml>=0.7.1
 urllib3>=1.26.4

tools/mo/requirements_onnx.txt

@@ -1,5 +1,6 @@
 onnx>=1.8.1
-networkx~=2.5
+networkx~=2.5; python_version <= "3.6"
+networkx~=2.6; python_version > "3.6"
 numpy>=1.16.6,<1.20
 defusedxml>=0.7.1
 requests>=2.25.1

tools/mo/requirements_tf.txt

@@ -1,5 +1,6 @@
 tensorflow~=2.5.0
-networkx~=2.5
+networkx~=2.5; python_version <= "3.6"
+networkx~=2.6; python_version > "3.6"
 numpy>=1.16.6,<1.20
 defusedxml>=0.7.1
 requests>=2.25.1

tools/mo/requirements_tf2.txt

@@ -1,5 +1,6 @@
 tensorflow~=2.5.0
-networkx~=2.5
+networkx~=2.5; python_version <= "3.6"
+networkx~=2.6; python_version > "3.6"
 numpy>=1.16.6,<1.20
 defusedxml>=0.7.1
 requests>=2.25.1

tools/pot/setup.py

@@ -45,14 +45,15 @@ if '--install-dev-extras' in sys.argv:
     sys.argv.remove('--install-dev-extras')
 
 INSTALL_REQUIRES = [
-    'scipy~=1.5.4',
-    'jstyleson~=0.0.2',
-    'numpy>=1.16.6,<1.20',
-    'addict>=2.4.0',
-    'networkx~=2.5',
-    'tqdm>=4.54.1',
-    'texttable~=1.6.3',
-    'pandas~=1.1.5',
+    "scipy~=1.5.4",
+    "jstyleson~=0.0.2",
+    "numpy>=1.16.6,<1.20",
+    "addict>=2.4.0",
+    "networkx~=2.5;python_version<='3.6'",
+    "networkx~=2.6;python_version>'3.6'",
+    "tqdm>=4.54.1",
+    "texttable~=1.6.3",
+    "pandas~=1.1.5",
 ]
 
 ALGO_EXTRAS = [