support custom delimeter for load_csv_file

Author: HydrogenSulfate

docs/zh/install_setup.md

@@ -28,10 +28,10 @@
 
     ???+ Info "安装注意事项"
 
-        如需使用外部导入STL文件来构建几何，以及使用加密采样等功能，还需额外安装三个依赖库
-        - [pymesh](https://pymesh.readthedocs.io/en/latest/installation.html#download-the-source)（推荐编译安装）
-        - [open3d](https://github.com/isl-org/Open3D/tree/master#python-quick-start)（推荐pip安装）
-        - [pysdf](https://github.com/sxyu/sdf) （推荐pip安装）
+        如需使用外部导入STL文件来构建几何，以及使用加密采样等功能，还需额外安装三个依赖库：
+        [pymesh](https://pymesh.readthedocs.io/en/latest/installation.html#download-the-source)（推荐编译安装）,
+        [open3d](https://github.com/isl-org/Open3D/tree/master#python-quick-start)（推荐pip安装）,
+        [pysdf](https://github.com/sxyu/sdf)（推荐pip安装）
 
 #### 1.2.2 pip 安装
 

ppsci/utils/reader.py

@@ -39,6 +39,7 @@ def load_csv_file(
     file_path: str,
     keys: Tuple[str, ...],
     alias_dict: Optional[Dict[str, str]] = None,
+    delimeter: str = ",",
     encoding: str = "utf-8",
 ) -> Dict[str, np.ndarray]:
     """Load *.csv file and fetch data as given keys.
@@ -59,7 +60,7 @@ def load_csv_file(
     try:
         # read all data from csv file
         with open(file_path, "r", encoding=encoding) as csv_file:
-            reader = csv.DictReader(csv_file)
+            reader = csv.DictReader(csv_file, delimiter=delimeter)
             raw_data = collections.defaultdict(list)
             for _, line_dict in enumerate(reader):
                 for key, value in line_dict.items():
@@ -121,7 +122,7 @@ def load_mat_file(
 
 def load_vtk_file(
     filename_without_timeid: str,
-    time_step: Union[float, int],
+    time_step: float,
     time_index: Tuple[int, ...],
     input_keys: Tuple[str, ...],
     label_keys: Optional[Tuple[str, ...]],
@@ -130,7 +131,7 @@ def load_vtk_file(
 
     Args:
         filename_without_timeid (str): File name without time id.
-        time_step (Union[float, Dict]): Physical time step.
+        time_step (float): Physical time step.
         time_index (Tuple[int, ...]): Physical time indexes.
         input_keys (Tuple[str, ...]): Input coordinates name keys.
         label_keys (Optional[Tuple[str, ...]]): Input label name keys.