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Groups > comp.lang.python > #28693

Re: Defining features in a list

Date 2012-09-07 17:47 +0200
From Jean-Michel Pichavant <jeanmichel@sequans.com>
Subject Re: Defining features in a list
References <e7c07576-677f-4230-9abc-34693e68fa7b@googlegroups.com>
Newsgroups comp.lang.python
Message-ID <mailman.358.1347032919.27098.python-list@python.org> (permalink)

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M Whitman wrote:
> Good Morning,
>
> I have been recently trying to define all of the features in a list but have been running into errors.  I would like to define the features similar to the following print statement.  Any advice would be appreciated.  I'm trying to transition my output from a text file to excel and if I can loop through my lists and define them that transition will be cleaner.
>
> Many Thanks,
>
> -Matt
>
> #Author: MGW
> #2012 
> import os, datetime, sys, arcpy, xlrd
> from arcpy import env
> submission = "Rev.mdb"
> env.workspace = "C:/temp/"+submission+"/Water"
>
> #Get Submission totals
> fclist = sorted(arcpy.ListFeatureClasses("*"))
> for fc in fclist:
>     print fc+"="+str(arcpy.GetCount_management(fc).getOutput(0))
>
> print "Complete"
> raw_input("Press ENTER to close this window") 
>
> Output Generated
> WATER_Net_Junctions=312
> WS_Hyd=484
> WS_Mains=2752
> WS_Node=4722
> WS_Vlvs=1078
> WS_WatLats=3661
> WS_WatMtrs=3662
> WTRPLANTS_points=0
> WTRPUMPSTA_points=0
> WTRTANKS=0
> WTR_ARV=10
> WTR_MISC=0
> Complete
> Press ENTER to close this window
>
> #Get Submission totals
> fclist = sorted(arcpy.ListFeatureClasses("*"))
> for fc in fclist:
>     fc=str(arcpy.GetCount_management(fc).getOutput(0))
>     #TEST
>     print WS_Hyd
>    
>         
> print "Complete"
> raw_input("Press ENTER to close this window") 
>
> Output Generated
> Traceback (most recent call last):
>   File "C:\Documents and Settings\mattheww\Desktop\Copy of QAQCexce_2.py", line 14, in <module>
>     print WS_Hyd
> NameError: name 'WS_Hyd' is not defined
>   
I'm not sure I've understood everything, is this something you're 
searching for:

fcDict = dict([(str(fc), 
str(arcpy.GetCount_management(fc).getOutput(0))) ) for fc in 
sorted(arcpy.ListFeatureClasses("*")) ])

print fcDict
print fcDict['WS_Hyd']

This is difficult to read because of the online statement, but it does 
basically the following pseudo code:

fcDict = dict([(feature.name, feature.value) for feature in featureList ])

Cheers,

JM

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Thread

Defining features in a list M Whitman <mgwhitman@gmail.com> - 2012-09-07 06:42 -0700
  Re: Defining features in a list Dave Angel <d@davea.name> - 2012-09-07 10:35 -0400
  Re: Defining features in a list M Whitman <mgwhitman@gmail.com> - 2012-09-07 08:21 -0700
    Re: Defining features in a list Dave Angel <d@davea.name> - 2012-09-07 11:55 -0400
  Re: Defining features in a list Jean-Michel Pichavant <jeanmichel@sequans.com> - 2012-09-07 17:47 +0200
  Re: Defining features in a list Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-09-07 15:29 -0400

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