InsertCursor (arcpy.da)

Zusammenfassung

InsertCursor establishes a write cursor on a feature class or table. InsertCursor can be used to add new rows.

Diskussion

When using InsertCursor on a point feature class, creating a PointGeometry and setting it to the SHAPE@ token is a comparatively expensive operation. Instead, define the point feature using tokens such as SHAPE@XY, SHAPE@Z, and SHAPE@M for faster, more efficient access.

Hinweis:

Opening simultaneous insert and/or update operations on the same workspace using different cursors requires the start of an edit session.

Hinweis:

arcpy.da.InsertCursor should not to be confused with arcpy.InsertCursor.

Syntax

InsertCursor (in_table, field_names)

Parameter	Erläuterung	Datentyp
in_table	The feature class, layer, table, or table view.	String
field_names [field_names,...]	A list (or tuple) of field names. For a single field, you can use a string instead of a list of strings. Use an asterisk (*) instead of a list of fields if you want to access all fields from the input table (raster and BLOB fields are excluded). However, for faster performance and reliable field order, it is recommended that the list of fields be narrowed to only those that are actually needed. Raster fields are not supported. Additional information can be accessed using tokens (such as OID@) in place of field names: SHAPE@XY —A tuple of the feature's centroid x,y coordinates. SHAPE@TRUECENTROID —A tuple of the feature's true centroid x,y coordinates. SHAPE@X —A double of the feature's x-coordinate. SHAPE@Y —A double of the feature's y-coordinate. SHAPE@Z —A double of the feature's z-coordinate. SHAPE@M —A double of the feature's m-value. SHAPE@JSON — The esri JSON string representing the geometry. SHAPE@WKB —The well-known binary (WKB) representation for OGC geometry. It provides a portable representation of a geometry value as a contiguous stream of bytes. SHAPE@WKT —The well-known text (WKT) representation for OGC geometry. It provides a portable representation of a geometry value as a text string. SHAPE@ —A geometry object for the feature. Polygon, polyline, or multipoint features can only be created using the SHAPE@ token. Hinweis: SHAPE@JSON, SHAPE@WKB, and SHAPE@WKT tokens were made available at ArcGIS 10.1 Service Pack 1.	String

Eigenschaften

Eigenschaft	Erläuterung	Datentyp
fields (Schreibgeschützt)	A tuple of field names used by the cursor. The tuple will include all fields (and tokens) specified by the field_names argument. If the field_names argument is set to "*", the fields property will include all fields used by the cursor. When using "*", geometry values will be returned in a tuple of the x,y-coordinates (equivalent to the SHAPE@XY token).	tuple

Methodenübersicht

Methode	Erläuterung
insertRow (row)	Inserts a row into a table.

Methoden

insertRow (row)

Parameter	Erläuterung	Datentyp
row [row,...]	A list or tuple of values. The order of values must be in the same order as specified when creating the cursor. When updating fields, if the incoming values match the type of field, the values will be cast as necessary. For example, a value of 1.0 to a string field will be added as "1.0", and a value of "25" added to a float field will be added as 25.0.	tuple

Codebeispiel

Using InsertCursor to insert new rows into a table.

import arcpy
import time 

# Create an insert cursor for a table specifying the fields that will
#   have values provided
# 
c = arcpy.da.InsertCursor("D:/data/base.gdb/roads_maint",
                          ("rowid", "distance", "CFCC", "DateInsp")) 

# Create 25 new rows. Set default values on distance and CFCC code 
# 
for x in range(0, 25):
    c.insertRow((x, 100, "A10", time.ctime())) 

# Delete cursor object
#
del c

Use InsertCursor with the SHAPE@XY token to add point features to a point feature class.

import arcpy

# A list of values that will be used to construct new rows
#
rowValues = [('Anderson', (1409934.4442000017, 1076766.8192000017)),
             ('Andrews', (752000.2489000037, 1128929.8114))]

# Open an InsertCursor
#
c = arcpy.da.InsertCursor("C:/data/texas.gdb/counties", 
                          ("NAME", "SHAPE@XY"))

# Insert new rows that include the county name and a x,y coordinate 
#  pair that represents the county center
#
for row in rowValues:
    c.insertRow(row) 

# Delete cursor object
#
del c

Use InsertCursor with the SHAPE@ token to add a new feature using a geometry object.

import arcpy

# Create a polyline geometry
#
array = arcpy.Array([arcpy.Point(459111.6681, 5010433.1285),
                     arcpy.Point(472516.3818, 5001431.0808),
                     arcpy.Point(477710.8185, 4986587.1063)])
polyline = arcpy.Polyline(array)

# Open an InsertCursor and insert the new geometry
#
c = arcpy.da.InsertCursor("C:/data/texas.gdb/counties", ["SHAPE@"])
c.insertRow([polyline])

# Delete cursor object
#
del c