topic Field Calculator Python in Geoprocessing Questions

Real Cool Stuff on Python

TedCronin — Thu, 29 Oct 2009 17:39:31 GMT

So, far, the py window is pretty cool. I type a little bit more here than with arcgisscripting, but really now, I think I will use this window over the command line window anyday even with the extra space ;). Long Live the Python Window. Now it doesn't beat Wing, but still pretty cool.

Should have tested this more in holistic.

from arcpy import...

TedCronin — Thu, 29 Oct 2009 17:44:46 GMT

I like we can now effectively put from ... import ... to use.

Saving and loading settings

TedCronin — Thu, 29 Oct 2009 18:31:03 GMT

To facilitate the transfer of environment settings from one script to another and to save settings from one session to the next, settings can be saved to a file. ArcPy can then set its environments by loading a settings file. This is pretty cool. Awesome.

The only issue I have is why os.system, and not subprocess as part of the sample for calling the settings file. Cool Nevertheless.

Lists

TedCronin — Thu, 29 Oct 2009 19:02:16 GMT

This was new at 9.3, but they are really cool.

For Loops for Cursors

TedCronin — Thu, 29 Oct 2009 21:05:23 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   😛

ListFiles()

TedCronin — Mon, 02 Nov 2009 18:09:00 GMT

arcpy.ListFiles("*.zip")
[u'C:\\GIS\\94\\CopyHome.zip', u'C:\\GIS\\94\\dd.zip', u'C:\\GIS\\94\\ESRI_AGOL_StreetMap_Web_Kit.zip', u'C:\\GIS\\94\\Python25.zip', u'C:\\GIS\\94\\Screenshots.zip', u'C:\\GIS\\94\\Topology.zip']

Cool functionality, no more glob.

Set Password

TedCronin — Mon, 09 Nov 2009 16:28:51 GMT

Applicable to py and models. This is very, very handy, and very cool.

drag and drop a path

TedCronin — Wed, 18 Nov 2009 22:59:41 GMT

I get the raw string inserted when dragging a path from Catalog, thats pretty cool. Thank you GP Team.

ListVersions is awesome

TedCronin — Wed, 02 Dec 2009 19:32:09 GMT

import arcpy as ap

#ap.env.workspace = r'C:\94_testing'

versionList = ap.ListVersions(r'Database Connections\ACR_GIS@sdemapper - Test Server.sde')
#versionList.remove ('dbo.DEFAULT')
#versionList.remove ('ACR_FINAL.Master')

versionList.sort()

for version in versionList:
print version

So, this is pretty cool, and it is a real list. So, I am assuming we can just feed this into a delete and delete a bunch of versions at once. Very Cool, indeed. 😛

Real Cool Stuff on Python

StefanOffermann — Fri, 05 Feb 2010 10:15:46 GMT

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

Yeah, this is really really much more readable then in 9.3 Hooray! :cool:

Field Calculator Python

BartHound — Thu, 25 Feb 2010 18:40:59 GMT

So, this looks like it would fall under the Real Cool Stuff on Python. Thank You GP Team.

Re: GP 10: Real Cool Stuff on Python

TedCronin — Mon, 19 Jul 2010 23:56:38 GMT

Spatial Reference --This is much cooler.

Much better, much more readable.

prjfile = r"C:\Program Files (x86)\ArcGIS\Desktop10.0\Coordinate Systems\NAD 1983 StatePlane California VI FIPS 0406 (US Feet).prj"
spatialRef = arcpy.SpatialReference (prjfile)

VS.

sr = "PROJCS['NAD_1983_StatePlane_California_VI_FIPS_0406_Feet',GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983',SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]],PROJECTION['Lambert_Conformal_Conic'],PARAMETER['False_Easting',6561666.666666666],PARAMETER['False_Northing',1640416.666666667],PARAMETER['Central_Meridian',-116.25],PARAMETER['Standard_Parallel_1',32.78333333333333],PARAMETER['Standard_Parallel_2',33.88333333333333],PARAMETER['Latitude_Of_Origin',32.16666666666666],UNIT['Foot_US',0.3048006096012192]];IsHighPrecision"

MUCH clearer syntax.

Thank you GP Team

Re: Beta 10: Real Cool Stuff on Python

TedCronin — Thu, 12 Aug 2010 04:30:17 GMT

dot notation