import arcpy # 获取参数 input_features = arcpy.GetParameterAsText(0) join_field = arcpy.GetParameterAsText(1) target_feature = arcpy.GetParameterAsText(2) target_field = arcpy.GetParameterAsText(3) area_threshold = arcpy.GetParameterAsText(4) # 创建空间连接 join_result = arcpy.SpatialJoin_analysis(input_features, target_feature, "in_memory/spatial_join", "JOIN_ONE_TO_ONE", "KEEP_ALL", "", "INTERSECT") # 使用MakeFeatureLayer创建要素图层，并使用AddFieldDelimiters处理字段名称 join_layer = arcpy.management.MakeFeatureLayer(join_result, "join_layer").getOutput(0) join_field_name = arcpy.AddFieldDelimiters(join_layer, join_field) # 使用SelectLayerByAttribute选择重叠面积大于阈值的要素 arcpy.management.SelectLayerByAttribute(join_layer, "NEW_SELECTION", "Shape_Area > " + str(area_threshold)) # 使用SummaryStatistics工具进行面积求和 summary_table = arcpy.Statistics_analysis(join_layer, "in_memory/summary_table", [["Shape_Area", "SUM"]], join_field_name) # 使用TableToNumPyArray将结果转换为字典 sum_dict = {} with arcpy.da.TableToNumPyArray(summary_table, [join_field, "SUM_Shape_Area"]) as arr: for row in arr: sum_dict[row[0]] = row[1] # 使用UpdateCursor更新目标要素类的目标字段 with arcpy.da.UpdateCursor(target_feature, [target_field, join_field], sql_clause=(None, "ORDER BY OBJECTID")) as cursor: for row in cursor: join_value = row[1] if join_value in sum_dict: area_sum = sum_dict[join_value] row[0] = area_sum cursor.updateRow(row) # 导出结果 output_feature = arcpy.GetParameterAsText(5) arcpy.CopyFeatures_management(target_feature, output_feature) # 删除游标对象和要素图层对象 del cursor, join_layer运行错误： Traceback (most recent call last): File "D:\实验2\空间连接.py", line 25, in <module> AttributeError: __exit__ 执行(ccc)失败。

这个错误可能是由于在使用`with`语句时，游标对象或要素图层对象没有正确创建导致的。请检查代码是否正确创建了这些对象。此外，你可以尝试在`with`语句前面添加一个`try-except`块来捕获更详细的错误信息。例如：

try:
    with arcpy.da.UpdateCursor(target_feature, [target_field, join_field], sql_clause=(None, "ORDER BY OBJECTID")) as cursor:
        for row in cursor:
            # 更新代码
except Exception as e:
    arcpy.AddError(str(e))

这样可以捕获更多的错误信息，帮助你更快地解决问题。

相关问题

input_features = arcpy.GetParameterAsText(0) join_field = arcpy.GetParameterAsText(1) target_feature = arcpy.GetParameterAsText(2) target_field = arcpy.GetParameterAsText(3) area_threshold = arcpy.GetParameterAsText(4)arcpy.CopyFeatures_management(target_feature, arcpy.GetParameterAsText(5))分别是什么意思

这段代码是用来获取工具参数并对数据进行复制的。具体解释如下：

- `input_features`：一个要素类或要素图层，作为加入操作的输入要素。
- `join_field`：用来将输入要素与目标要素类/图层连接的字段。
- `target_feature`：要连接到输入要素的要素类或要素图层。
- `target_field`：用来将目标要素与输入要素连接的字段。
- `area_threshold`：指定连接的最小面积阈值（可选参数）。
- `arcpy.CopyFeatures_management(target_feature, arcpy.GetParameterAsText(5))`：将目标要素类或图层复制到输出要素类或图层中。`arcpy.GetParameterAsText(5)`是用来获取输出要素类的参数。

简而言之，这段代码是用来将两个要素类或图层连接起来，并将结果复制到输出要素类或图层中。

import arcpy # 获取参数 input_features = arcpy.GetParameterAsText(0) join_field = arcpy.GetParameterAsText(1) target_feature = arcpy.GetParameterAsText(2) target_field = arcpy.GetParameterAsText(3) area_threshold = arcpy.GetParameterAsText(4) # 创建空间连接 join_result = arcpy.SpatialJoin_analysis(input_features, target_feature, "in_memory/spatial_join", "JOIN_ONE_TO_ONE", "KEEP_ALL", "", "INTERSECT") # 使用MakeFeatureLayer创建要素图层，并使用AddFieldDelimiters处理字段名称 join_layer = arcpy.management.MakeFeatureLayer(join_result, "join_layer").getOutput(0) join_field_name = arcpy.AddFieldDelimiters(join_layer, join_field) # 使用SelectLayerByAttribute选择重叠面积大于阈值的要素 arcpy.management.SelectLayerByAttribute(join_layer, "NEW_SELECTION", "Shape_Area > " + str(area_threshold)) # 使用SummaryStatistics工具进行面积求和 summary_table = arcpy.Statistics_analysis(join_layer, "in_memory/summary_table", [["Shape_Area", "SUM"]], join_field_name) # 使用TableToNumPyArray将结果转换为字典 sum_dict = {} with arcpy.da.TableToNumPyArray(summary_table, [join_field, "SUM_Shape_Area"]) as arr: for row in arr: sum_dict[row[0]] = row[1] # 使用UpdateCursor更新目标要素类的目标字段 with arcpy.da.UpdateCursor(target_feature, [target_field, join_field], sql_clause=(None, "ORDER BY OBJECTID"),) as cursor: for row in cursor: join_value = row[1] if join_value in sum_dict: area_sum = sum_dict[join_value] row[0] = area_sum cursor.updateRow(row) # 导出结果 output_feature = arcpy.GetParameterAsText(5) arcpy.CopyFeatures_management(target_feature, output_feature)运行错误：Traceback (most recent call last): File "D:\实验2\空间连接.py", line 25, in <module> AttributeError: __exit__ 执行(ccc)失败。请改正代码

这个错误可能是因为你在使用with语句时出错了。请尝试在 with 语句中指定 as 子句的变量类型，例如：

with arcpy.da.UpdateCursor(target_feature, [target_field, join_field], sql_clause=(None, "ORDER BY OBJECTID")) as cursor:

同时，建议在 with 语句结束后手动删除游标对象，例如：

del cursor

完整代码如下：

import arcpy

# 获取参数
input_features = arcpy.GetParameterAsText(0)
join_field = arcpy.GetParameterAsText(1)
target_feature = arcpy.GetParameterAsText(2)
target_field = arcpy.GetParameterAsText(3)
area_threshold = arcpy.GetParameterAsText(4)

# 创建空间连接
join_result = arcpy.SpatialJoin_analysis(input_features, target_feature, "in_memory/spatial_join", "JOIN_ONE_TO_ONE", "KEEP_ALL", "", "INTERSECT")

# 使用MakeFeatureLayer创建要素图层，并使用AddFieldDelimiters处理字段名称
join_layer = arcpy.management.MakeFeatureLayer(join_result, "join_layer").getOutput(0)
join_field_name = arcpy.AddFieldDelimiters(join_layer, join_field)

# 使用SelectLayerByAttribute选择重叠面积大于阈值的要素
arcpy.management.SelectLayerByAttribute(join_layer, "NEW_SELECTION", "Shape_Area > " + str(area_threshold))

# 使用SummaryStatistics工具进行面积求和
summary_table = arcpy.Statistics_analysis(join_layer, "in_memory/summary_table", [["Shape_Area", "SUM"]], join_field_name)

# 使用TableToNumPyArray将结果转换为字典
sum_dict = {}
with arcpy.da.TableToNumPyArray(summary_table, [join_field, "SUM_Shape_Area"]) as arr:
    for row in arr:
        sum_dict[row[0]] = row[1]

# 使用UpdateCursor更新目标要素类的目标字段
with arcpy.da.UpdateCursor(target_feature, [target_field, join_field], sql_clause=(None, "ORDER BY OBJECTID")) as cursor:
    for row in cursor:
        join_value = row[1]
        if join_value in sum_dict:
            area_sum = sum_dict[join_value]
            row[0] = area_sum
        cursor.updateRow(row)

# 导出结果
output_feature = arcpy.GetParameterAsText(5)
arcpy.CopyFeatures_management(target_feature, output_feature)

# 删除游标对象
del cursor