Don't crash with generics that have dotted names.

Author: domdfcoding

doc-source/changelog.rst

@@ -10,6 +10,7 @@ Bugs Fixed
 
 * :func:`formate.reformat_file` -- Only write to the file if there have been any changes.
   This avoids unnecessary changes to the mtime.
+* :mod:`formate.reformat_generics` -- Don't crash if a generic's name contains a ``.``.
 
 
 0.4.7

formate.toml

@@ -32,6 +32,7 @@ use_parentheses = true
 remove_redundant_aliases = true
 default_section = "THIRDPARTY"
 known_third_party = [
+    "astatine",
     "asttokens",
     "attr_utils",
     "attrs",

formate/reformat_generics.py

@@ -48,6 +48,7 @@
 from io import StringIO
 
 # 3rd party
+import astatine
 import asttokens  # type: ignore
 from domdf_python_tools.stringlist import DelimitedList, StringList
 from domdf_python_tools.words import TAB
@@ -204,7 +205,7 @@ def visit_Attribute(self, node: ast.Attribute) -> None:  # noqa: D102
 
 	def visit_Subscript(self, node: ast.Subscript) -> None:  # noqa: D102
 		union = Generic(
-				node.value.id,  # type: ignore
+				'.'.join(astatine.get_attribute_name(node.value)),
 				UnionVisitor().visit(get_slice_value(node.slice)),
 				)
 		self.structure.append(union)

requirements.txt

@@ -1,3 +1,4 @@
+astatine>=0.3.1
 asttokens>=2.0.4
 attr-utils>=0.5.5
 attrs>=20.3.0