fix key search

@@ -23,6 +23,7 @@ print(res)
 # {'words_result': 
 #      {'姓名': {'words': 'xx', 'score': 1, 'location': {'left': 105, 'top': 277, 'width': 60, 'height': 28}}, 
 #       '个人身份证件号码': {'words': 'xx', 'score': 1, 'location': {'left': 320, 'top': 278, 'widtght': 24}}, 
+#       '经销商名称': {'words': 'xx', 'score': 1, 'location': {'left': 320, 'top': 278, 'widtght': 24}}, 
 #       '签字': {'words': '有', 'score': 1, 'location': {'left': 540, 'top': 1293, 'width': 143, 'height': 91}}}
 # }
 

@@ -31,11 +31,15 @@ class Retriever:
         coordinates_list.sort(key=lambda x: x[1])
         return coordinates_list[0]
 
-    @staticmethod
-    def key_right(coordinates_list, key_coordinates, top_padding, bottom_padding, scope):
+    def key_right(self, coordinates_list, key_coordinates, top_padding, bottom_padding, scope):
         # 关键词查找方向：右侧
         if len(coordinates_list) == 1:
             return coordinates_list[0]
+
+        # 没有上一层关键词的坐标时，返回最上面的坐标
+        if key_coordinates is None:
+            return self.key_top1(coordinates_list, key_coordinates)
+
         height = key_coordinates[-1] - key_coordinates[1]
         y_min = key_coordinates[1] - (top_padding * height)
         y_max = key_coordinates[-1] + (bottom_padding * height)
@@ -45,15 +49,19 @@ class Retriever:
         x_max = key_coordinates[2] + (width * scope)
 
         x_min_find = None
-        key_coordinates = None
+        find_key_coordinates = None
         for x0, y0, x1, y1 in coordinates_list:
             cent_x = x0 + ((x1 - x0) / 2)
             cent_y = y0 + ((y1 - y0) / 2)
             if x_min < cent_x < x_max and y_min < cent_y < y_max:
                 if x_min_find is None or x0 < x_min_find:
                     x_min_find = x0
-                    key_coordinates = (x0, y0, x1, y1)
-        return key_coordinates
+                    find_key_coordinates = (x0, y0, x1, y1)
+
+        if find_key_coordinates is None:
+            return self.key_top1(coordinates_list, key_coordinates)
+        else:
+            return find_key_coordinates
 
     def value_right(self, go_res, key_coordinates, top_padding, bottom_padding, scope, value_type=None):
         # 字段值查找方向：右侧
@@ -147,19 +155,17 @@ class Retriever:
         # 搜索关键词
         key_coordinates_info = dict()
         for field, key_text_list in self.target_fields[self.keys_str].items():
-            pre_key_coordinates = None
+            last_key_coordinates = None
             for key_text, _, direction, kwargs in key_text_list:
                 if key_text not in key_text_info:
-                    break
-                key_coordinates = getattr(self, 'key_{0}'.format(direction))(
+                    last_key_coordinates = None
+                    continue
+                last_key_coordinates = getattr(self, 'key_{0}'.format(direction))(
                     key_text_info[key_text],
-                    pre_key_coordinates,
+                    last_key_coordinates,
                     **kwargs)
-                if not isinstance(key_coordinates, tuple):
-                    break
-                pre_key_coordinates = key_coordinates
-            else:
-                key_coordinates_info[field] = pre_key_coordinates
+
+            key_coordinates_info[field] = last_key_coordinates
 
         # 搜索字段值
         value_res = dict()