Python batch script to delete Attributes

Question

I currently have a script that will select and delete all the values less than 0.1 in a column. The script below works, however it specifies a specific .shp, I want to batch this so it runs through all the shapefiles in a geodatabase

import arcpy
arcpy.SelectLayerByAttribute_management("Sr90_contour","NEW_SELECTION",'"Contour" < 0.1')
arcpy.DeleteFeatures_management("Sr90_contour")

Answer 1

You can specify the GDB as your workspace and then use the arcpy.ListFeatureClasses() function to get all the names of the features in that GDB:

import arcpy

arcpy.env.worskapce = r'C:\path\to\my.gdb'

for fc in arcpy.ListFeatureClasses():
    arcpy.MakeFeatureLayer_management(fc, "lyr")
    arcpy.SelectLayerByAttribute_management("lyr", "NEW_SELECTION", '"Contour" < 0.1')
    arcpy.DeleteFeatures_management("lyr")

Note that this will only work if all your feature classes have the Contour field.