topic Cursors in Geoprocessing Questions

Cursors

TedCronin — Thu, 29 Oct 2009 20:45:32 GMT

Is the support for FOR loops new at 9.4, it seems like I could never get them to work with anything but a while loop. :confused:

Cursors

DavidWynne — Thu, 29 Oct 2009 20:50:31 GMT

Hi Ted,
Right, this is an enhancement at 9.4. Less code, easier to understand.

At 9.3, you would have to use a while loop like so...

rows = gp.SearchCursor(myTable)
row = rows.next()
while row:
    print row.getValue("Rank")
    row = rows.next()

At 9.4, you can you use a for loop (you can also use the while loop approach if you desire)...

for row in arcpy.SearchCursor(myTable)
    print row.getValue("Rank")

-Dave

Sweeet

TedCronin — Thu, 29 Oct 2009 21:04:04 GMT

Hi Ted,
Right, this is an enhancement at 9.4. Less code, easier to understand.

At 9.3, you would have to use a while loop like so...

rows = gp.SearchCursor(myTable)
row = rows.next()
while row:
    print row.getValue("Rank")
    row = rows.next()

At 9.4, you can you use a for loop (you can also use the while loop approach if you desire)...

for row in arcpy.SearchCursor(myTable)
    print row.getValue("Rank")

-Dave

Absofrickenlutely, much more pythonic then while loops. This is HUGE.