我有下表。我需要代码来递归计算最小开始日期，并找到此日期和finishdate之间的Date范围。如果范围<= 60，则Cat应该增加1，否则应保持为-1。挑战在于，def函数中的三元运算符拒绝更新，因为我的方法未在第62行分配项。
OBJECTID_1 * Conc * ID start finish DateRange Cat
1 ASPELBJNMI LAPMT 6/27/2018 8/11/2018 100 -1
2 ASPELBJNMI KLKIY 8/22/2018 8/31/2018 100 -1
3 ASPELBJNMI HDOKK 8/12/2018 9/30/2018 100 -1
4 ASPELBJNMI XMCZW 8/22/2018 10/20/2018 100 -1
5 BKRKAVQTZC FCBES 7/1/2018 8/15/2018 100 -1
6 BKRKAVQTZC NHQGW 8/24/2018 9/4/2018 100 -1
7 BKRKAVQTZC LVUSS 8/9/2018 10/4/2018 100 -1
8 BKRKAVQTZC RQVNN 8/18/2018 10/24/2018 100 -1
9 FKKTHEJGCY IHORM 7/2/2018 8/20/2018 100 -1
10 FKKTHEJGCY AZFEV 8/28/2018 9/8/2018 100 -1
11 FKKTHEJGCY YAVOY 8/4/2018 9/29/2018 100 -1
12 FKKTHEJGCY AMWAX 8/16/2018 10/22/2018 100 -1
13 JUNRNEXCRG QCOWV 6/30/2018 8/25/2018 100 -1
14 JUNRNEXCRG AOYNL 8/25/2018 9/9/2018 100 -1
15 JUNRNEXCRG CGCHK 8/4/2018 10/3/2018 100 -1
16 JUNRNEXCRG IQYGJ 8/12/2018 10/26/2018 100 -1
我尝试了各种方法来更新行。
我尝试使用dict理解并调用dict值。 我还尝试让def函数以递归方式合并生成器，列表和元组以及调用值。结果是一样的。
https://community.esri.com/message/861460-update-cursor-not-honoring-selection-in-a-for-loop
我的代码
import arcpy
from datetime import datetime
from datetime import datetime as dt
from datetime import timedelta
import time
from datetime import date
#Variables Start
arcpy.env.workspace = r'C:datap\New File Geodatabase.gdb'
fc= 'Classifyjoin212'
field =['Conc','ID']
fields = ['start', 'finish', 'DateRange', 'Cat']
Classifyjoin = "Classifyjoin"
Classifyjoin__2_ = Classifyjoin
#Def function
def min_cat(b=datetime.now() , m=datetime.now(), x = 2, y=-1):
"""This function calculates the date range between earliest start in a category to the exact finish date of an individual member"""""
#return(b-m).days
lg =[2]
e = (b-m).days
f = {True: x, False: y} [e <= 60]#(y, x) [e <=60 ] # [ x if e<=60 else -1]
return [ e, f]
#print min_cat(b=dt.strptime('2019-06-26', '%Y-%m-%d').date(), m=dt.strptime('2018-11-29', '%Y-%m-%d').date(), x= 9, y=-1)
temp_lyr= arcpy.MakeTableView_management(fc, "temp_lyr")
ud = {}
with arcpy.da.SearchCursor(fc, field) as rows:
for row in rows:
if row[0] not in ud:
ud[row[0]] = row[1]
for k in ud:
where_clause="Conc IN( '%s')" % k #+ "AND ID IN( '%s')" %v
#print(where_clause)
Sele = arcpy.SelectLayerByAttribute_management(temp_lyr, 'NEW_SELECTION', where_clause)#Carry out the selection
cnt = arcpy.GetCount_management(temp_lyr) # Counting the selected and copied features
print("The number of selected records is: " + str(cnt))
listdates = []
listCat =[]
bv =[]
#k = [row[3] for row in arcpy.da.SearchCursor(fc, ["start", "finish", "DateRange", "Cat"]) if row [2]<60]
with arcpy.da.UpdateCursor(fc, fields) as cursor:
for row in cursor:
listCat.append(row[3])
jp =max(listCat)
kp = int('{}'.format(jp))
kp +=1
#while row[3]==0:
if row[3]==-1:
listdates.append(row[0])
pg =min(listdates)#.date()
jup = '{}'.format(pg)
jop = dt.strptime(jup, '%Y-%m-%d %H:%M:%S').date()
bg = '{}'.format(row[1])
job = dt.strptime(bg, '%Y-%m-%d %H:%M:%S').date()
a =min_cat(b= job, m=jop, x= kp, y=-1)
row[2] = a[0]
cursor.updateRow(row)
rows[3] = a[1]
cursor.updateRow(rows)
del cursor, row
所需结果：
OBJECTID_1 * Conc * ID start finish DateRange Cat
1 ASPELBJNMI LAPMT 6/27/2018 8/11/2018 45 0
3 ASPELBJNMI HDOKK 8/12/2018 9/30/2018 49 1
2 ASPELBJNMI KLKIY 8/22/2018 8/31/2018 19 1
4 ASPELBJNMI XMCZW 8/22/2018 10/20/2018 59 2
5 BKRKAVQTZC FCBES 7/1/2018 8/15/2018 45 0
7 BKRKAVQTZC LVUSS 8/9/2018 10/4/2018 56 1
8 BKRKAVQTZC RQVNN 8/18/2018 10/24/2018 67 -1
6 BKRKAVQTZC NHQGW 8/24/2018 9/4/2018 26 1
9 FKKTHEJGCY IHORM 7/2/2018 8/20/2018 49 0
11 FKKTHEJGCY YAVOY 8/4/2018 9/29/2018 56 1
12 FKKTHEJGCY AMWAX 8/16/2018 10/22/2018 67 -1
10 FKKTHEJGCY AZFEV 8/28/2018 9/8/2018 35 1
13 JUNRNEXCRG QCOWV 6/30/2018 8/25/2018 56 0
15 JUNRNEXCRG CGCHK 8/4/2018 10/3/2018 60 1
16 JUNRNEXCRG IQYGJ 8/12/2018 10/26/2018 75 -1
14 JUNRNEXCRG AOYNL 8/25/2018 9/9/2018 36 1