start_point = row[0].getPart(0)
时间: 2023-06-16 13:04:30 浏览: 44
这个代码片段看起来像是 Python 中使用了自定义对象的方法调用。具体来说,`row` 应该是一个列表或元组,其中的每个元素都是一个对象,该对象具有 `getPart()` 方法。这个方法可能是自定义的,因为 Python 内置的数据类型中并没有这个方法。
`row[0]` 选择了列表或元组中的第一个元素,然后调用了这个元素的 `getPart(0)` 方法。这个方法可能返回该对象的第一个部分,可能是一个字符串、数字或其他数据类型。`start_point` 变量将返回的值保存下来,以便在后续代码中使用。
相关问题
# coding=UTF-8 # This Python file uses the following encoding: utf-8 import arcpy # 设置工作空间和环境设置 arcpy.env.workspace = "D:/数据备份" # 设置工作空间路径 arcpy.env.overwriteOutput = True # 允许覆盖输出 # 定义线图层和点图层的名称 line_layer = r"D:\数据备份\线1.shp" # 替换为线图层的名称 point_layer = r"D:\数据备份\点.shp" # 替换为点图层的名称 # 创建一个用于存储要删除的节点的列表 nodes_to_delete = [] # 遍历线图层中的每个要素 with arcpy.da.UpdateCursor(line_layer, ["SHAPE@"]) as cursor: for row in cursor: line_geometry = row[0] # 获取线几何对象 # 检查线的起点和终点是否与点图层中的点重叠 start_point = line_geometry.firstPoint end_point = line_geometry.lastPoint start_point_overlaps = False end_point_overlaps = False with arcpy.da.SearchCursor(point_layer, ["SHAPE@"]) as point_cursor: for point_row in point_cursor: point_geometry = point_row[0] # 获取点几何对象 # 检查起点是否与点重叠 if start_point.within(point_geometry): start_point_overlaps = True break # 检查终点是否与点重叠 if end_point.within(point_geometry): end_point_overlaps = True break # 如果起点和终点都没有与点重叠,则将该要素的所有节点添加到要删除的列表中 if not start_point_overlaps and not end_point_overlaps: for i in range(1, line_geometry.pointCount - 1): nodes_to_delete.append(i) # 删除要删除的节点 with arcpy.da.UpdateCursor(line_layer, ["SHAPE@"]) as cursor: for row in cursor: line_geometry = row[0] # 获取线几何对象 # 创建一个新的 Polyline 对象 new_line_geometry = arcpy.Polyline() # 复制需要保留的节点到新的 Polyline 对象中 for i in range(line_geometry.pointCount): if i not in nodes_to_delete: new_line_geometry.addPoint(line_geometry.getPart(0).getObject(i)) # 更新要素 cursor.updateRow([new_line_geometry]) print("节点删除完成!")
这段代码看起来很好!它会遍历线图层中的每个要素,并检查起点和终点是否与点图层中的点重叠。然后,根据不重叠的条件,它将要删除的节点添加到列表中。最后,它使用新的 Polyline 对象来复制需要保留的节点,并更新线图层的要素。
请确保将工作空间路径和图层名称替换为实际的路径和名称,并确保路径使用正斜杠 (`/`) 或转义斜杠 (`\\`)。此外,还请确保 ArcGIS 环境已正确设置。
如果你有任何其他问题,或需要进一步的帮助,请随时告诉我。我很乐意帮助你!
request.getPart
request.getPart() is a method in the Servlet API that is used to retrieve a specific part of a multipart request. A multipart request is a type of HTTP request that can contain multiple parts, such as files or form data.
The getPart() method takes a String parameter that represents the name of the part to retrieve. It returns an instance of the Part interface, which represents a single part of the multipart request.
Here is an example usage of the getPart() method:
```
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Part filePart = request.getPart("file");
// do something with the filePart
}
```
In this example, the getPart() method is used to retrieve the part of the request with the name "file". The returned Part object can then be used to access the content of the file that was uploaded as part of the request.
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