Update to flake8 v7, add a dev-requirements.txt file

Author: eemeli

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: 3.9
-      - run: python -m pip install flake8==6 mypy==1 types-babel types-pytz
+      - run: python -m pip install -r dev-requirements.txt
       - run: python -m pip install ./fluent.syntax ./fluent.runtime
       - run: python -m flake8
       - run: python -m mypy fluent.syntax/fluent fluent.runtime/fluent

dev-requirements.txt

@@ -0,0 +1,4 @@
+flake8 ~= 7.0
+mypy ~= 1.0
+types-babel
+types-pytz

fluent.syntax/fluent/syntax/ast.py

@@ -36,7 +36,7 @@ def from_json(value: Any) -> Any:
 def scalars_equal(node1: Any, node2: Any, ignored_fields: List[str]) -> bool:
     """Compare two nodes which are not lists."""
 
-    if type(node1) != type(node2):
+    if type(node1) is not type(node2):
         return False
 
     if isinstance(node1, BaseNode):

fluent.syntax/tests/syntax/test_visitor.py

@@ -98,7 +98,7 @@ def __init__(self, before, after):
 
     def __call__(self, node):
         """Perform find and replace on text values only"""
-        if type(node) == ast.TextElement:
+        if type(node) is ast.TextElement:
             node.value = node.value.replace(self.before, self.after)
         return node