type: Fix type errors (#8629)

Author: hoxbro

panel/command/compile.py

@@ -48,7 +48,7 @@ def run_compile(
     file_loaders = file_loaders or []
     errors = 0
     for bundle, components in bundles.items():
-        component_names = '\n- '.join(c.name for c in components)
+        component_names = '\n- '.join([cn for c in components if (cn := c.name) is not None])
         print(f"Building {bundle} containing the following components:\n\n- {component_names}\n")  # noqa
         out = compile_components(
             components,

panel/io/admin.py

@@ -43,7 +43,7 @@
 
 PROCESSES: dict[int, Process] = {}
 
-log_sessions = []
+log_sessions: list = []
 
 class LogFilter(logging.Filter):
 

panel/io/handlers.py

@@ -41,7 +41,7 @@
 
 log = logging.getLogger('panel.io.handlers')
 
-CELL_DISPLAY = []
+CELL_DISPLAY: list = []
 
 
 @contextmanager

panel/io/mime_render.py

@@ -112,7 +112,7 @@ def _convert_expr(expr: ast.Expr) -> ast.Expression:
     expr.lineno, expr.col_offset = 0, 0
     return ast.Expression(expr.value)
 
-_OUT_BUFFER = []
+_OUT_BUFFER: list = []
 
 def _display(*objs, **kwargs):
     """

panel/io/pyodide.py

@@ -127,7 +127,7 @@ def _read_json(*args, **kwargs):
         return _read_json_original(*args, **kwargs)
     pandas.read_json = _read_json  # type: ignore
 
-_tasks = set()
+_tasks: set = set()
 
 def async_execute(func: t.Any):
     event_loop = asyncio.get_running_loop()
@@ -268,7 +268,7 @@ def _process_document_events(doc: Document, events: list[t.Any]):
 })
 """)
 
-_current_buffers = []
+_current_buffers: list = []
 _patching = False
 
 def _bytes_converter(value, converter, other):
@@ -323,7 +323,7 @@ def _convert_json_patch(json_patch):
     return serialized
 
 # Holds proxied functions so they are not GCed
-_proxies = []
+_proxies: list = []
 
 def _link_docs(pydoc: Document, jsdoc: t.Any) -> None:
     """

panel/io/server.py

@@ -207,7 +207,7 @@ def _path_template_to_tornado_route(route: str) -> str:
         return route
     return '/' + '/'.join(converted_segments)
 
-_tasks = set()
+_tasks: set = set()
 
 def async_execute(func: Callable[..., None]) -> None:
     """

panel/pane/image.py

@@ -24,7 +24,7 @@
 
     from bokeh.model import Model
 
-_tasks = set()
+_tasks: set = set()
 
 
 class FileBase(HTMLBasePane):

panel/pane/vtk/synchronizable_serializer.py

@@ -293,7 +293,7 @@ def buildDependencyCallList(self, idstr, newList, addMethod, removeMethod):
 # Global variables
 # -----------------------------------------------------------------------------
 
-SERIALIZERS = {}
+SERIALIZERS: dict = {}
 context = None
 
 # -----------------------------------------------------------------------------

pixi.toml

@@ -267,6 +267,7 @@ types-psutil = "*"
 types-requests = "*"
 types-tqdm = "*"
 typing-extensions = "*"
+param = ">=2.4.1rc1"
 
 [feature.type.tasks]
 test-type = 'mypy panel'

pyproject.toml

@@ -258,6 +258,7 @@ explicit_package_bases = true
 disable_error_code = "attr-defined"
 mypy_path = ""
 exclude = []
+plugins = ["param.mypy_plugin"]
 
 [[tool.mypy.overrides]]
 module = [