Revise for current API and style (#6)

Author: rocky

.pre-commit-config.yaml

@@ -16,8 +16,8 @@ repos:
     - id: black
       language_version: python3
       exclude: 'mathicsscript/version.py'
--   repo: https://github.com/pycqa/flake8
-    rev: 3.9.2
-    hooks:
-      - id: flake8
-        stages: [commit]
+# -   repo: https://github.com/pycqa/flake8
+#     rev: 3.9.2
+#     hooks:
+#       - id: flake8
+#         stages: [commit]

Makefile

@@ -61,7 +61,7 @@ clean-pyc:
 
 #: Run py.test tests. Use environment variable "o" for pytest options
 pytest:
-	py.test test $o
+	$(PYTHON) -m pytest test $o
 
 
 # #: Create data that is used to in Django docs and to build TeX PDF

pymathics/natlang/__init__.py

@@ -7,7 +7,7 @@
 """
 
 
-from pymathics.natlang.__main__ import *
+from pymathics.natlang.main import *
 from pymathics.natlang.version import __version__
 
 pymathics_version_data = {