Delete Field (Data Management)

Summary

Deletes one or more fields from a table, feature class, feature layer, or raster dataset.

Usage

• Fields cannot be deleted from nonnative, read-only data formats in ArcGIS, such as VPF and CAD datasets.

Syntax

arcpy.management.DeleteField(in_table, drop_field)

Parameter	Explanation	Data Type
in_table	The table containing the fields to be deleted. The existing input table will be modified.	Mosaic Layer; Raster Layer; Table View
drop_field [drop_field,...]	The fields to be dropped from the input table. Only nonrequired fields may be deleted.	Field

Derived Output

Name	Explanation	Data Type
out_table	The updated dataset.	Table View; Raster Layer; Mosaic Layer

Code sample

DeleteField example (Python window)

The following Python window script demonstrates how to use the DeleteField function in immediate mode:

import arcpy
arcpy.env.workspace = "C:/data"
arcpy.CopyFeatures_management("majorrds.shp", "C:/output/majorrds_copy.shp")
arcpy.DeleteField_management("C:/output/majorrds_copy.shp", 
                             ["STREET_NAM", "LABEL", "CLASS"])

DeleteField example 2 (stand-alone script)

The following stand-alone script demonstrates how to use the DeleteField function.

# Name: DeleteField_Example2.py
# Description: Delete several fields from a feature class
  
# Import system modules
import arcpy
 
# Set environment settings
arcpy.env.workspace = "C:/data"
 
# Set local variables
inFeatures = "accident.dbf"
outFeatureClass = "C:/output/new_accident.dbf"
dropFields = ["STREET_NAM", "LABEL", "CLASS"]
 
# Execute CopyFeatures to make a new copy of the feature class
#  Use CopyRows if you have a table
arcpy.CopyFeatures_management(inFeatures, outFeatureClass)
 
# Execute DeleteField
arcpy.DeleteField_management(outFeatureClass, dropFields)

DeleteField example 3 (stand-alone script)

Use the DeleteField function to delete all unnecessary fields from a feature class or table.

# Description: Delete unnecessary fields from a feature class or table.
 
# Import system modules
import arcpy
 
# Get user-supplied input and output arguments
inTable = arcpy.GetParameterAsText(0)
updatedTable = arcpy.GetParameterAsText(1)

# Describe the input (need to test the dataset and data types)
desc = arcpy.Describe(inTable)

# Make a copy of the input (so we can mantain the original as is)
if desc.datasetType == "FeatureClass":
    arcpy.CopyFeatures_management(inTable, updatedTable)
else:
    arcpy.CopyRows_management(inTable, updatedTable)

# Use ListFields to get a list of field objects
fieldObjList = arcpy.ListFields(updatedTable)

# Create an empty list that will be populated with field names        
fieldNameList = []

# For each field in the object list, add the field name to the
#  name list.  If the field is required, exclude it, to prevent errors
for field in fieldObjList:
    if not field.required:
        fieldNameList.append(field.name)

# dBASE tables require a field other than an OID and Shape.  If this is
#  the case, retain an extra field (the first one in the original list)
if desc.dataType in ["ShapeFile", "DbaseTable"]:
    fieldNameList = fieldNameList[1:]

# Execute DeleteField to delete all fields in the field list. 
arcpy.DeleteField_management(updatedTable, fieldNameList)

Environments

Current Workspace

Licensing information

• Basic: Yes
• Standard: Yes
• Advanced: Yes