Question

如果表中的要素列是渡口，那么我需要在已经添加到表中的Ferry列中添加Yes。如果特征栏没有说渡口，我需要在渡轮列上添加否。以下是我遇到问题的代码块。有什么建议？是的我是python的新手，任何建议或提示将不胜感激，因为它将帮助我学习。欢呼声。

#need to update FERRY column with yes or no values if ferry crossing is available in feature field
delimfield = arcpy.AddFieldDelimiters(fc, "FERRY")
cursor = arcpy.da.UpdateCursor(fc, ["FERRY"])
for row in cursor:
    if row[0] == "ferry crossing":
        cursor.updateRow("FERRY")
        print "YES"
    if row[0] is not "ferry crossing":
        cursor.updateRow("FERRY")
        print "NO"

del row
del cursor

#if feature is ferry crossing == YES in FERRY field
#if feature is not ferry crossing == NO in FERRY field

Answer 1

您需要获取光标中的两个字段：测试的feature字段和要更新的FERRY字段。然后，您的现有代码将正确测试，但您需要修改它以执行更新。使用字段的列表位置在行对象中访问它们。

with arcpy.da.UpdateCursor(fc, ["FEATURE", "FERRY"]) as cursor:
    for row in cursor:
        if row[0] == "ferry crossing": # test the FEATURE field
            row[1] = "FERRY" # set the FERRY field
            print "YES"
        else:
            print "NO"
        cursor.updateRow(row) # commit the changes

使用python将shp属性数据添加到列

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