Minor refactoring of dict literal usage (python#16837)

Author: nautics889

mypy/dmypy_util.py

@@ -104,8 +104,7 @@ def truncate(self, size: int | None = 0) -> int:
         raise io.UnsupportedOperation
 
     def write(self, output: str) -> int:
-        resp: dict[str, Any] = {}
-        resp[self.output_key] = output
+        resp: dict[str, Any] = {self.output_key: output}
         send(self.server, resp)
         return len(output)
 

mypy/gclogger.py

@@ -38,10 +38,11 @@ def __exit__(self, *args: object) -> None:
 
     def get_stats(self) -> Mapping[str, float]:
         end_time = time.time()
-        result = {}
-        result["gc_time"] = self.gc_time
-        result["gc_calls"] = self.gc_calls
-        result["gc_collected"] = self.gc_collected
-        result["gc_uncollectable"] = self.gc_uncollectable
-        result["build_time"] = end_time - self.start_time
+        result = {
+            "gc_time": self.gc_time,
+            "gc_calls": self.gc_calls,
+            "gc_collected": self.gc_collected,
+            "gc_uncollectable": self.gc_uncollectable,
+            "build_time": end_time - self.start_time,
+        }
         return result

mypy/server/update.py

@@ -1059,8 +1059,7 @@ def find_symbol_tables_recursive(prefix: str, symbols: SymbolTable) -> dict[str,
 
     Returns a dictionary from full name to corresponding symbol table.
     """
-    result = {}
-    result[prefix] = symbols
+    result = {prefix: symbols}
     for name, node in symbols.items():
         if isinstance(node.node, TypeInfo) and node.node.fullname.startswith(prefix + "."):
             more = find_symbol_tables_recursive(prefix + "." + name, node.node.names)

mypy/types.py

@@ -1493,9 +1493,11 @@ def serialize(self) -> JsonDict | str:
         type_ref = self.type.fullname
         if not self.args and not self.last_known_value:
             return type_ref
-        data: JsonDict = {".class": "Instance"}
-        data["type_ref"] = type_ref
-        data["args"] = [arg.serialize() for arg in self.args]
+        data: JsonDict = {
+            ".class": "Instance",
+            "type_ref": type_ref,
+            "args": [arg.serialize() for arg in self.args],
+        }
         if self.last_known_value is not None:
             data["last_known_value"] = self.last_known_value.serialize()
         data["extra_attrs"] = self.extra_attrs.serialize() if self.extra_attrs else None

mypyc/codegen/emitclass.py

@@ -213,8 +213,7 @@ def generate_class(cl: ClassIR, module: str, emitter: Emitter) -> None:
     methods_name = f"{name_prefix}_methods"
     vtable_setup_name = f"{name_prefix}_trait_vtable_setup"
 
-    fields: dict[str, str] = {}
-    fields["tp_name"] = f'"{name}"'
+    fields: dict[str, str] = {"tp_name": f'"{name}"'}
 
     generate_full = not cl.is_trait and not cl.builtin_base
     needs_getseters = cl.needs_getseters or not cl.is_generated or cl.has_dict