Revise for Mathics 2.2.0 release

Author: rocky

pymathics/graph/generators.py

@@ -5,7 +5,7 @@
 networkx does all the heavy lifting.
 """
 
-from mathics.builtin.randomnumbers import RandomEnv
+from mathics.builtin.numbers.randomnumbers import RandomEnv
 from mathics.core.expression import String
 
 from pymathics.graph.__main__ import (

setup.py

@@ -3,7 +3,6 @@
 
 import sys
 import platform
-import os
 import os.path as osp
 from setuptools import setup, find_namespace_packages
 
@@ -31,7 +30,7 @@ def read(*rnames):
     name="pymathics-graph",
     version=__version__,
     packages=find_namespace_packages(include=["pymathics.*"]),
-    install_requires=["Mathics3>=1.1.1", "networkx", "pydot", "matplotlib"],
+    install_requires=["Mathics3>=2.2.0", "networkx", "pydot", "matplotlib"],
     # don't pack Mathics in egg because of media files, etc.
     zip_safe=False,
     maintainer="Mathics Group",