1 of 22 Tough love Grandma. 2 of 22 Extraordinary People Iceman Blind painter Human calculator Human camera Human compass Spiderman Roofballers.

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Tough love Grandma

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Extraordinary People

Iceman

Blind painter

Human calculator

Human camera

Human compassSpiderman Roofballers

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Overview

gp.Describe(object) Describe object

gp.List* Python list of objects

ArcGIS 9.3

ArcGIS 10arcpy.Describe(object)arcpy.List*

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9.2 9.3

Evolution Describe Object Properties

An example of how Python is evolvingwith ArcGIS

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Describing data

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Describe Example (feature class)

… if you plan to do multiples in same workspace

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Describe a Feature Class

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Describe a Geodatabase

some are case sensitive, others notarcpy.env.workspace is

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Fields in a Feature Class via Describe

ArcGIS 8.x, 9.x

ArcGIS 10

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Describe a Raster

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Overview

gp.Describe(object) Describe object

arcpy.List* Python list of objects

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Lists of Objects in Geoprocessing OMD

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Listing Data

List*: Python List (i.e. returns a Python List)

Know number of * in a Python list

Use a for loop

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ListFields(pInputValue, [wild card], [FieldType])

Same Field object as each Field object in list thatis returned by Fields propertyof the Describe Object

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ListFields examples

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ListFeatureClasses([wildCard], [FeatureType])

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ListFeatureClasses examples

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os.walk(top, topdown, onerror)

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os.walk() simple example

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os.walk() not-so-simple example

Find all Flash videos (SWF) in the entire tree under a given root folderIf the SWF file has the “slide”, and not “group”, as part of its name convert the first frame of the video to a JPG with the name of the SWF

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os.walk() not-so-simple example

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There’s an app for that