[Fix] mypy报错

.github/workflows/pythonapp.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install ruff mypy uv
+        pip install ruff mypy uv types-tqdm
         uv pip install ta-lib==0.6.4 --index=https://pypi.vnpy.com --system
         uv pip install -e .[alpha,dev] --system
     - name: Lint with ruff

vnpy/alpha/dataset/processor.py

@@ -8,7 +8,7 @@ from .utility import to_datetime
 
 def process_drop_na(df: pl.DataFrame, names: list[str] | None = None) -> pl.DataFrame:
     """Remove rows with missing values"""
-    if not names:
+    if names is None:
         names = df.columns[2:-1]
 
     for name in names:

vnpy/alpha/dataset/ta_function.py

@@ -11,7 +11,8 @@ from .utility import DataProxy
 
 def to_pd_series(feature: DataProxy) -> pd.Series:
     """Convert to pandas.Series data structure"""
-    return feature.df.to_pandas().set_index(["datetime", "vt_symbol"])["data"]
+    series: pd.Series = feature.df.to_pandas().set_index(["datetime", "vt_symbol"])["data"]
+    return series
 
 
 def to_pl_dataframe(series: pd.Series) -> pl.DataFrame:

vnpy/trader/database.py

@@ -156,4 +156,4 @@ def get_database() -> BaseDatabase:
 
     # Create database object from module
     database = module.Database()
-    return database     # type: ignore
+    return database

vnpy/trader/datafeed.py

@@ -65,4 +65,4 @@ def get_datafeed() -> BaseDatafeed:
 
             print(_("无法加载数据服务模块，请运行 pip install {} 尝试安装").format(module_name))
 
-    return datafeed     # type: ignore
+    return datafeed