ArcGIS Pro scripting tool (5) - delete duplicates after sorting

Requirements describe

Each city has multiple high-speed entrances and exits , The distance between each expressway entrance and the municipal government of the city has been included in the attribute table , How to keep each city closest to the municipal government , That is to say NEAR_DIST What about the highway entrance with the lowest value ？

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Solutions

ArcGIS Bring it with you Delete the same item Tools , But only stay OID The top one , And this one is often not what we want to keep . In order to meet the needs , Through the first SearchCursor Build a with duplicate elements sql expression , Reuse Updatecursor Sort each set of duplicates according to requirements , Keep the top item , All items after deletion . Use scripts to build geo processing tools , Parameter setting and interface are as follows .

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Python Script

# coding=utf-8

import arcpy
from collections import Counter


fc = arcpy.GetParameterAsText(0)
fieldVaule = arcpy.GetParameterAsText(1)

field_names = fieldVaule.split(";")
field_count = len(field_names)

field_types = []
i = 0
while i < field_count:
    field_type = arcpy.ListFields(fc, field_names[i])[0].type
    field_types.append(field_type)
    i = i+1


def quotes(type):
    if type == "String":
        return "'"
    else:
        return ""

value = []
with arcpy.da.SearchCursor(fc, field_names=field_names) as cursor:
    for row in cursor:
        i = 0
        clause = ""
        while i < field_count:
            quote = quotes(field_types[i])
            clause = clause+field_names[i]+" = " + \
                quote+str(row[i])+quote+" And "
            i = i+1
        clause = clause[:-5]
        value.append(clause)

del row
del cursor

counts = Counter(value)
dupValue = [id for id in value if counts[id] > 1]
uniValue = list(set(dupValue))

order = arcpy.GetParameter(2)
orderColumn = order.columnCount
orderRow = order.rowCount

switch = {" Keep the minimum ": "ASC",
          " Keep the maximum ": "DESC", }

i = 0
orderclause = ""
while i < orderRow:
    orderfid = order.getValue(i, 0)
    ordertype = order.getValue(i, 1)
    orderclause = orderclause+orderfid+" "+switch.get(ordertype)+";"
    i = i+1

for uni in uniValue:
    with arcpy.da.UpdateCursor(fc, field_names=field_names, where_clause=uni, sql_clause=(None, 'ORDER BY ' + orderclause)) as cursor:
        next(cursor)
        while True:
            try:
                next(cursor)
                cursor.deleteRow()
            except StopIteration:
                break
    arcpy.AddMessage(" deleted  "+uni+"  Same as ")

    del cursor

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Tool demonstration

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  Tool description

1. Apply to ArcGIS Pro and Python 3, If you want to ArcMap and Python 2 Use in , Need to deal with Chinese character encoding
2. And ArcGIS Self contained Delete the same item Same tool , This tool does not generate new datasets , Instead, delete the same items directly from the original data set , Please note before use The backup data
3. Tools Field and Sort field You can set multiple values and types as needed
4.   Sorting method Medium Keep the minimum The corresponding order is ascending , Keep the maximum The corresponding order is descending , The tool keeps the first item after the same item in each group