Fixup: stabilize black usage

pyproject.toml

@@ -51,7 +51,6 @@ dev = [
 ]
 tests = [
   'chardet',
-  'black',
   'tox',
   'parameterized',
   'unittest-parallel',

src/pydot/__init__.py

@@ -1,4 +1,5 @@
 """An interface to GraphViz."""
+
 import logging
 
 __author__ = "Ero Carrera"
@@ -11,5 +12,5 @@
 _logger.debug("pydot %s", __version__)
 
 
-from pydot.exceptions import *
-from pydot.core import *
+from pydot.exceptions import *  # noqa: E402, F403
+from pydot.core import *  # noqa: F403, E402

src/pydot/dot_parser.py

@@ -7,6 +7,7 @@
 Author: Michael Krause <[email protected]>
 Fixes by: Ero Carrera <[email protected]>
 """
+
 import logging
 
 from pyparsing import (
@@ -159,7 +160,9 @@ def update_parent_graph_hierarchy(g, parent_graph=None, level=0):
                             if vertex["parent_graph"] is g:
                                 pass
                             else:
-                                vertex["parent_graph"].set_parent_graph(parent_graph)
+                                vertex["parent_graph"].set_parent_graph(
+                                    parent_graph
+                                )
 
 
 def add_defaults(element, defaults):
@@ -169,7 +172,9 @@ def add_defaults(element, defaults):
             d[key] = value
 
 
-def add_elements(g, toks, defaults_graph=None, defaults_node=None, defaults_edge=None):
+def add_elements(
+    g, toks, defaults_graph=None, defaults_node=None, defaults_edge=None
+):
     if defaults_graph is None:
         defaults_graph = {}
     if defaults_node is None:
@@ -192,7 +197,9 @@ def add_elements(g, toks, defaults_graph=None, defaults_node=None, defaults_edge
 
         elif isinstance(element, ParseResults):
             for e in element:
-                add_elements(g, [e], defaults_graph, defaults_node, defaults_edge)
+                add_elements(
+                    g, [e], defaults_graph, defaults_node, defaults_edge
+                )
 
         elif isinstance(element, DefaultStatement):
             if element.default_type == "graph":
@@ -209,7 +216,9 @@ def add_elements(g, toks, defaults_graph=None, defaults_node=None, defaults_edge
                 defaults_edge.update(element.attrs)
 
             else:
-                raise ValueError(f"Unknown DefaultStatement: {element.default_type}")
+                raise ValueError(
+                    f"Unknown DefaultStatement: {element.default_type}"
+                )
 
         elif isinstance(element, P_AttrList):
             g.obj_dict["attributes"].update(element.attrs)
@@ -300,7 +309,9 @@ def push_edge_stmt(s, loc, toks):
             e.append(pydot.Edge(n_prev, n_next[0] + n_next_port, **attrs))
 
     elif isinstance(toks[2][0], pydot.Graph):
-        e.append(pydot.Edge(n_prev, pydot.frozendict(toks[2][0].obj_dict), **attrs))
+        e.append(
+            pydot.Edge(n_prev, pydot.frozendict(toks[2][0].obj_dict), **attrs)
+        )
 
     elif isinstance(toks[2][0], pydot.Node):
         node = toks[2][0]
@@ -315,7 +326,9 @@ def push_edge_stmt(s, loc, toks):
     # if the target of this edge is the name of a node
     elif isinstance(toks[2][0], str):
         for n_next in [n for n in tuple(toks)[2::2]]:
-            if isinstance(n_next, P_AttrList) or not isinstance(n_next[0], str):
+            if isinstance(n_next, P_AttrList) or not isinstance(
+                n_next[0], str
+            ):
                 continue
 
             n_next_port = do_node_ports(n_next)
@@ -390,9 +403,9 @@ def graph_definition():
 
         ID = (identifier | html_text | double_quoted_string).setName("ID")
 
-        float_number = Combine(Optional(minus) + OneOrMore(Word(nums + "."))).setName(
-            "float_number"
-        )
+        float_number = Combine(
+            Optional(minus) + OneOrMore(Word(nums + "."))
+        ).setName("float_number")
 
         righthand_id = (float_number | ID).setName("righthand_id")
 
@@ -417,7 +430,9 @@ def graph_definition():
             lbrack.suppress() + Optional(a_list) + rbrack.suppress()
         ).setName("attr_list")
 
-        attr_stmt = (Group(graph_ | node_ | edge_) + attr_list).setName("attr_stmt")
+        attr_stmt = (Group(graph_ | node_ | edge_) + attr_list).setName(
+            "attr_stmt"
+        )
 
         edgeop = (Literal("--") | Literal("->")).setName("edgeop")
 
@@ -434,17 +449,26 @@ def graph_definition():
         edgeRHS = OneOrMore(edgeop + edge_point)
         edge_stmt = edge_point + edgeRHS + Optional(attr_list)
 
-        subgraph = Group(subgraph_ + Optional(ID) + graph_stmt).setName("subgraph")
-
-        edge_point << Group(subgraph | graph_stmt | node_id).setName("edge_point")
+        subgraph = Group(subgraph_ + Optional(ID) + graph_stmt).setName(
+            "subgraph"
+        )
 
-        node_stmt = (node_id + Optional(attr_list) + Optional(semi.suppress())).setName(
-            "node_stmt"
+        edge_point << Group(subgraph | graph_stmt | node_id).setName(
+            "edge_point"
         )
 
+        node_stmt = (
+            node_id + Optional(attr_list) + Optional(semi.suppress())
+        ).setName("node_stmt")
+
         assignment = (ID + equals + righthand_id).setName("assignment")
         stmt = (
-            assignment | edge_stmt | attr_stmt | subgraph | graph_stmt | node_stmt
+            assignment
+            | edge_stmt
+            | attr_stmt
+            | subgraph
+            | graph_stmt
+            | node_stmt
         ).setName("stmt")
         stmt_list << OneOrMore(stmt + Optional(semi.suppress()))