Python – Use TKinter to Provide Variables Dynamically in Python

dynamicpythontkinter

I've been looking for a way to enter a unique field name into an attribute table for up to 40 feature classes. I need the field names to be meaningful, not just 'field1', 'field2' etc. For example, if the feature class represents wetlands I would like a field called 'Wetland'.

I thought the easiest way of doing this would be to use TKinter. I can print the feature class name and then dynamically enter a field name with the TKinter data entry msgbox. Then keep looping through the feature classes until they all have a field with a unique name.

I've found some examples but am unsure about how to use data entry text as a variable in Python. If anyone out there had an example script or can make suggestions on this script I'd appreciate it:

import arcpy
from arcpy import env
from Tkinter import *

# Environment Workspace
env.workspace = r'G:\TEST\Python_Test\Test.gdb'

def receive():
    text = E1.get()
    print (text)
top = Tk()
L1 = Label(top, text="User Name")
L1.pack( side = LEFT)
E1 = Entry(top, bd =5)
E1.pack(side = RIGHT)
b = Button(top, text="OK", width=10, command=receive)
b.pack()
top.mainloop()

Best Answer

I managed to figure this out... My code now iterates through feature classes, requests a field name, calculates fields, deletes unwanted fields. And then joins the left over fields to each other with a spatial join. I was stuck on adding the interactive tkinter dialog box in the first loop, and the delete field text at the end of the first loop. I still have some to do on this, but thought I'd post the answers to my original question. Thought I'd put my code up for others:

import Tkinter
import tkSimpleDialog
import arcpy
from arcpy import env

env.workspace = r'G:\TEST\Python_Test\Test.gdb\env'

fcList = arcpy.ListFeatureClasses()

for fc in fcList:
    print fc
    root = Tkinter.Tk()
    var = tkSimpleDialog.askstring("Field Name", "Enter Field Name")
    print var

    arcpy.AddField_management(fc, var, "TEXT", "", "", "50", "", "NULLABLE", "REQUIRED", "")
    print "Adding field name " + var + " to " + fc
    arcpy.CalculateField_management(fc, var, "\"Y\"", "PYTHON", "")
    print "Calculating field " + var + " to " + fc

    keep = ['OBJECTID', 'Shape', 'Tower', var, 'Shape_Area', 'Shape_Length']

    discard = []
    for field in [f.name for f in arcpy.ListFields(fc)if f.type <> 'OBJECTID']:
        if field not in keep:
            discard.append(field)
    arcpy.DeleteField_management(fc, discard)
    print "Deleted all fields except those specified"

# Input variables for spatial join
Buffer1 = r'G:\Test\Python_Test\Test.gdb\Buffer1'
Buffer2 = r'G:\Test\Python_Test\Test.gdb\Buffer2'

sjList = arcpy.ListFeatureClasses()

# For loop for spatial join process

for sj in sjList:

    # Spatial join between buffered points and feature
    arcpy.SpatialJoin_analysis(Buffer1, sj, Buffer2, "JOIN_ONE_TO_ONE", "KEEP_ALL")
    print "Completed spatial join " + sj

    # Delete Buffer1 containing no joined features
    arcpy.Delete_management(Buffer1, "FeatureClass")
    print "deleted Buffer1 " + sj

    # Copies Buffer2 containing joined features and outputs as Buffer1
    arcpy.Copy_management(Buffer2, Buffer1, "")
    print "Copied Buffer2 to Buffer1 "  + sj

    # Deletes Buffer2 to allow script to create Buffer2 in next iteration
    arcpy.Delete_management(Buffer2, "FeatureClass")
    print "Deleted Buffer2 "  + sj
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