Как получить различные вариант сумм от n числа

# -*- coding: utf8 -*-
from openpyxl import load_workbook
 
total = 277158.37
 
wb = load_workbook('test1.xls')
sheet_ranges = wb['Sheet1']
 
dictA = {}
 
for row in sheet_ranges.iter_rows():
 
    if row[0].value != None and row[1].value != None:
        column_A = str(row[0].value)
        column_B = row[1].value
        dictA[column_A] = column_B
        for doc_id, summa in dictA.items():
            if sum(summa) == total:
                print(doc_id,summa)

# -*- coding: utf8 -*-
# from openpyxl import load_workbook
import itertools
 
# total = 277158.37
 
# wb = load_workbook('test1.xls')
# sheet_ranges = wb['Sheet1']
 
# dictA = {}
 
# for row in sheet_ranges.iter_rows():
# 
#     if row[0].value != None and row[1].value != None:
#         column_A = str(row[0].value)
#         column_B = row[1].value
#         dictA[column_A] = column_B
#         for doc_id, summa in dictA.items():
#             if sum(summa) == total:
#                 print(doc_id,summa)
 
total = 1455.05
 
dictA = {
    '12345': 678,
    '23232': 777.05,
    '323232': 234.908
}
 
for r in range(1, len(dictA) + 1):
    for keys_combination in itertools.combinations(dictA, r):
        if sum([dictA[key] for key in keys_combination]) == total:
            print({key: dictA[key] for key in keys_combination})

total = 1455.05
 
dictA = {
    '12345': 678,
    '23232': 777.05,
    '323232': 234.908
}
 
for r in range(1, len(dictA) + 1):
    for keys_combination in itertools.combinations(dictA, r):
        if sum([dictA[key] for key in keys_combination]) == total:
            result = {key: dictA[key] for key in keys_combination}
            for key, value in result.items():
                print("'{}': {}".format(key, value))

# -*- coding: utf8 -*-
from openpyxl import load_workbook
import itertools, datetime
 
total = 144.84
now = datetime.datetime.now()
cur_time = now.strftime("%d.%m.%Y %H:%M")
print()
print(f'\tСкрипт запущен: {last_time}')
print()
print(f'\tЖелаемая сумма: {total}')
print()
wb = load_workbook('test.xlsm')
sheet_ranges = wb['Sheet1']
 
dictA = {}
 
for row in sheet_ranges.iter_rows():
 
    if row[0].value != None and row[1].value != None:
        column_A = str(row[0].value)
        column_B = row[1].value
        if column_B <= total:
            dictA[column_A] = column_B
print('\tКол-во записей для подсчёта: ' + str(len(dictA)))
print()
for r in range(1, len(dictA) + 1):
    for keys_combination in itertools.combinations(dictA, r):
        if sum([dictA[key] for key in keys_combination]) == total:
            print({key: dictA[key] for key in keys_combination})
print()
 
print(f'\tСкрипт закончил работать')

total = 1455.05
 
dictA = {
    '12345': 678,
    '23232': 777.05,
    '323232': 234.908
}
 
check_restart = False
check_comlete = False
items_in_combination = 1
 
dictA = {key: value for key, value in dictA.items() if value <= total}
 
while not check_comlete:
    for r in range(items_in_combination, len(dictA) + 1):
        if check_restart:
            break
        for keys_combination in itertools.combinations(dictA, r):
            if sum([dictA[key] for key in keys_combination]) == total:
                for key in keys_combination:
                    print("'{}': {}".format(key, dictA.pop(key)))
                check_restart = True
                items_in_combination = r
                break
    check_complete = True