DROP(PY) All PY3.6 libs & limitations

Author: ankostis

CHANGES.rst

@@ -1160,7 +1160,7 @@ v2.2.0 (20 Nov 2019, @ankostis): enhance OPERATIONS & restruct their modules
 
 v2.1.1 (12 Nov 2019, @ankostis): global configs
 ===============================================
-+ BREAK: drop Python-3.6 compatibility.
++ BREAK: drop Python < 3.6 compatibility.
 + FEAT: Use (possibly multiple) global configurations for all networks,
   stored in a :class:`contextvars.ContextVar`.
 + ENH/BREAK: Use a (possibly) single `execution_pool` in global-configs.

graphtik/autograph.py

@@ -17,6 +17,7 @@
 from collections import ChainMap
 from inspect import Parameter
 from pathlib import Path
+from re import Pattern as RegexPattern
 from types import ModuleType
 from typing import (
     Any,
@@ -40,13 +41,6 @@
 from .fnop import FnOp, reparse_operation_data
 from .modifier import is_sfx, keyword, optional, sfxed, token
 
-try:
-    from re import Pattern as RegexPattern
-except ImportError:
-    # PY3.6
-    from typing import Pattern as RegexPattern
-
-
 log = logging.getLogger(__name__)
 
 _my_project_dir = Path(__file__).parent

graphtik/sphinxext/__init__.py

@@ -4,6 +4,7 @@
 Extends Sphinx with :rst:dir:`graphtik` directive for :term:`plotting <plotter>` from doctest code.
 """
 import collections.abc as cabc
+import importlib.resources as pkg_resources
 import itertools as itt
 import os
 import re
@@ -35,12 +36,6 @@
 
 from .. import __version__
 
-try:
-    import importlib.resources as pkg_resources
-except ImportError:
-    # Use backported to PY<3.7 `importlib_resources` lib.
-    import importlib_resources as pkg_resources  # noqa
-
 obj_name = "graphtik diagram"
 role_name = "graphtik"
 log = logging.getLogger(__name__)

setup.py

@@ -50,7 +50,6 @@ def _ask_git_version() -> Optional[str]:
     "jinja2>=3",
     # Direct use now due to jinja2-3+.
     "MarkupSafe",
-    "importlib_resources; python_version<'3.7'",
 ]
 matplot_deps = plot_deps + ["matplotlib"]
 sphinx_deps = plot_deps + ["sphinx[setuptools] >=2", "sphinxext-opengraph"]
@@ -94,12 +93,9 @@ def _ask_git_version() -> Optional[str]:
         "graphtik": ["py.typed"],
         "graphtik.sphinxext": ["*.css"],
     },
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     install_requires=[
-        "contextvars; python_version < '3.7'",
-        "dataclasses; python_version < '3.7'",
-        "networkx; python_version >= '3.5'",
-        "networkx == 2.2; python_version < '3.5'",
+        "networkx",
         "boltons",  # for IndexSet
     ],
     extras_require={
@@ -139,7 +135,6 @@ def _ask_git_version() -> Optional[str]:
         "Operating System :: POSIX",
         "Operating System :: Unix",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",

test/test_plot.py

@@ -547,9 +547,6 @@ def dot_str_pipeline():
     )
 
 
-@pytest.mark.skipif(
-    sys.version_info < (3, 7), reason="PY3.6- have different docstrings for builtins."
-)
 def test_node_dot_str0(dot_str_pipeline):
     dot_str = str(dot_str_pipeline.plot())
     print(dot_str)
@@ -605,9 +602,6 @@ def test_node_dot_str0(dot_str_pipeline):
     assert _striplines(dot_str) == _striplines(exp)
 
 
-@pytest.mark.skipif(
-    sys.version_info < (3, 7), reason="PY3.6 - has different docstrings for builtins."
-)
 def test_node_dot_str1(dot_str_pipeline, monkeypatch):
     ## Test node-hidding & Graph-overlaying.
     #