小编out*_*ile的帖子

使用arcpy,我的目的是在列表中存储要素类以供进一步处理.每行都是一个{'field name': value}包含几何图形的字典.

实现此任务的最pythonic方法应该是使用list comprehension:

fc = '/path/to/fc'
fields = [f.name for f in arcpy.ListFields(fc)]   # get field list
features = [[row.getValue(f) for f in fields] for row in arcpy.SearchCursor(fc)]

此方法适用于数据,但列表中的几何图形都相同(在fc中检索的最后几何图形).SearchCursor的这种行为已经在StackOverflow上发表了评论.

我尝试了另一种方法:

fc = '/path/to/fc'
shape_field = arcpy.Describe(fc).shapeFieldName

# load geometry in a list
geom = arcpy.Geometry()
feat = [{shape_field: f} for f in arcpy.CopyFeatures_management(fc, geom)] # slow

# load data in a list
fields = [f.name for f in arcpy.ListFields(fc)]
data = [dict([(f, …