例外クラス作成

Pipfile

@@ -9,7 +9,7 @@ flake8 = "*"
 isort = "*"
 
 [packages]
-numpy = "==1.20.1"
+numpy = ">=1.20.1"
 
 [requires]
 python_version = "3.9"

README.md

@@ -33,7 +33,7 @@ Run the tool with downloaded "xml" or "directory containing .xml" or ".zip conta
 ```python
 from pathlib import Path
 
-from convert_fgd_dem import Dem
+from src.convert_fgd_dem import Dem
 
 
 def main():

src/convert_fgd_dem/converter.py

@@ -171,7 +171,7 @@ def dem_to_geotiff(self):
         geotiff = Geotiff(*data_for_geotiff)
 
         if self.rgbify:
-            root, ext = os.path.splitext(self.file_name)
+            os.path.splitext(self.file_name)
             geotiff.create(
                 3,
                 gdal.GDT_Byte,

src/convert_fgd_dem/dem.py

@@ -6,6 +6,8 @@
 
 import numpy as np
 
+from .helpers import DemInputXmlException
+
 
 class Dem:
     """Retrieve metadata from DEM xml"""
@@ -77,7 +79,7 @@ def _get_xml_paths(self):
             xml_paths = [
                 xml_path for xml_path in self.import_path.glob("*.xml")]
             if xml_paths is None:
-                raise Exception("指定ディレクトリに.xmlが存在しません")
+                raise DemInputXmlException("指定ディレクトリに.xmlが存在しません")
 
         elif self.import_path.suffix == ".xml":
             xml_paths = [self.import_path]
@@ -88,9 +90,9 @@ def _get_xml_paths(self):
             xml_paths = [
                 xml_path for xml_path in extract_dir.glob("*.xml")]
             if not xml_paths:
-                raise Exception("指定のパスにxmlファイルが存在しません")
+                raise DemInputXmlException("指定のパスにxmlファイルが存在しません")
         else:
-            raise Exception(
+            raise DemInputXmlException(
                 "指定できる形式は「xml」「.xmlが格納されたディレクトリ」「.xmlが格納された.zip」のみです")
         return xml_paths
 
@@ -149,20 +151,24 @@ def get_xml_content(self, xml_path):
             dict: A dictionary containing mesh code, metadata, and elevation values
         """
         if not xml_path.suffix == ".xml":
-            raise Exception("指定できる形式は.xmlのみです")
+            raise DemInputXmlException("指定できる形式は.xmlのみです")
 
         name_space = {
             "dataset": "http://fgd.gsi.go.jp/spec/2008/FGD_GMLSchema",
             "gml": "http://www.opengis.net/gml/3.2",
         }
 
-        tree = et.parse(xml_path)
-        root = tree.getroot()
-
-        mesh_code = int(
-            root.find(
-                "dataset:DEM//dataset:mesh",
-                name_space).text)
+        try:
+            tree = et.parse(xml_path)
+            root = tree.getroot()
+            mesh_code = int(
+                root.find(
+                    "dataset:DEM//dataset:mesh",
+                    name_space
+                ).text
+            )
+        except et.ParseError:
+            raise DemInputXmlException("不正なxmlです")
 
         raw_metadata = {
             "mesh_code": mesh_code,
@@ -225,11 +231,10 @@ def _check_mesh_codes(self):
             elif len(str_mesh) == 8:
                 third_mesh_codes.append(mesh_code)
             else:
-                raise Exception(f"メッシュコードが不正です。mesh_code={mesh_code}")
+                raise DemInputXmlException(f"メッシュコードが不正です。mesh_code={mesh_code}")
 
-        # どちらもTrue、つまり要素が存在しているときにraise
         if all((third_mesh_codes, second_mesh_codes)):
-            raise Exception("2次メッシュと3次メッシュが混合しています。")
+            raise DemInputXmlException("2次メッシュと3次メッシュが混合しています。")
 
     def _get_xml_content_list(self):
         """Create a list of metadata and elevation values"""

src/convert_fgd_dem/geotiff.py

@@ -4,6 +4,7 @@
 import numpy as np
 
 from .helpers import (
+    DemOutputTiffException,
     convert_height_to_R,
     convert_height_to_G,
     convert_height_to_B,
@@ -98,14 +99,17 @@ def create(
         created_tiff_path = self.output_path / file_name
 
         driver = gdal.GetDriverByName("GTiff")
-        dst_ds = driver.Create(
-            str(created_tiff_path.resolve()),
-            self.x_length,
-            self.y_length,
-            band_count,
-            dtype
-        )
-        dst_ds.SetGeoTransform(self.geo_transform)
+        try:
+            dst_ds = driver.Create(
+                str(created_tiff_path.resolve()),
+                self.x_length,
+                self.y_length,
+                band_count,
+                dtype
+            )
+            dst_ds.SetGeoTransform(self.geo_transform)
+        except AttributeError:
+            raise DemOutputTiffException("出力先パスに問題がある可能性があります")
 
         self.write_raster_bands(
             rgbify,

src/convert_fgd_dem/helpers.py

@@ -5,6 +5,16 @@
 from osgeo import gdal
 
 
+class DemInputXmlException(Exception):
+    """Exception class about input DEM xml"""
+    pass
+
+
+class DemOutputTiffException(Exception):
+    """Exception class about input DEM xml"""
+    pass
+
+
 def warp(
     file_name,
     source_path=None,