Pathon 批量删除 Feature

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//数据集未注册

import acpy

arcpy.env.workspace='...\\temp.gdb'

fcs=arcpy.ListFeatureClass('','','Navy')  //Navy 数据集名称

for f in fcs

  arcpy.TruncateTable_managerment(f)

  print f

//数据集已注册

import  arcpy

arcpy.evn.workspace='Database Connections\\xxx.sde'

fcs=arcpy.ListFeatureClass('','','Navy')

delFts=0

for f in fcs

    urows=arcpy.UpdateCursor(f,'')

    for row in urows

    delFts+=1

    urows.deleterow(row)

print delFts