我在python中使用装饰器完成了多个聚合函数。
这些if条件仅为不同值的一个条件生成输出。
我尝试过改变位置，但它们总是产生相同的输出。
我做错了什么？
如何根据条件
中的要求使值不同示例代码：
# This class allows function addition, multiplication, division
etc.
class operable:
def __init__(self, f):
self.f = f
def __call__(self, x):
return self.f(x)
def op_to_function_op(op):
def function_op(self, operand):
def f(x):
return op(self(x), operand(x))
return operable(f)
return function_op
for name, op in [(name, getattr(operator, name)) for name in
dir(operator) if "__" in name]:
try:
op(1,2)
except TypeError:
pass
else:
setattr(operable, name, op_to_function_op(op))
def allocate_service(ModelAdmin, request, queryset):
platinum_customers = []
silver_customers = []
gold_customers = []
non_customers = []
message = ''
for customer in queryset:
@operable
def getAge():
age = 0
if customer.Age == Customer.objects.get(Age = "60 +"):
age = 0
elif customer.Age == Customer.objects.get(Age = "36 - 59"):
age = 1
else:
age = 2
def getEducation():
education = 0
if customer.Education == Customer.objects.get(Education =
"Highschool and below"):
education = 0
else:
education = 1
def getEmployment():
employment = 0
if customer.Employment == Customer.objects.get(Employment =
"Student"):
employment = 0
elif customer.Employment == Customer.objects.get(Employment =
"Contract"):
employment = 1
else:
employment = 2
def getStability():
stability = 0
if customer.Employer_Stability ==
Customer.objects.get(Employer_Stability = "Unstable"):
stability = 0
else:
stability = 1
def getResidential():
residential = 0
if customer.Residential_Status ==
Customer.objects.get(Residential_Status = "Rented"):
residential = 0
else:
residential = 1
def getSalary():
salary = 0
if customer.Salary == Customer.objects.get(Salary <= 1000):
salary = 0
elif customer.Salary == Customer.objects.get(Salary <= 10001 and
Salary > 1000):
salary = 1
else:
salary = 2
def getLoyalty():
loyalty = 0
loy = Customer.objects.get(Customer_Loyalty <= 2)
if customer.Customer_Loyalty == loy.Customer_Loyalty:
loyalty = 0
else:
loyalty = 1
def getBalance():
balance = 0
if customer.Balance == Customer.objects.get(Balance <= 2500):
balance = 0
elif customer.Balance == Customer.objects.get(Balance <= 10001
and Balance > 2500):
balance = 1
else:
balance = 2
def feat_list():
total = getAge + getEducation + getEmployment + getStability +
getResidential + getSalary + getLoyalty + getBalance
return total
if feat_list() <= 11:
customer.Service_Level = Service.objects.get(service_name =
'Silver Package')
silver_customers.append(customer.Name)
elif 11 < feat_list() <= 15:
customer.Service_Level = Service.objects.get(service_name =
'Gold Package')
gold_customers.append(customer.Name)
elif feat_list() > 15:
customer.Service_Level = Service.objects.get(service_name =
"Platinum Package")
platinum_customers.append(customer.Name)
else:
customer.Service_Level = Service.objects.get(service_name = "No
Service Package")
non_customers.append(customer.name)
customer.save()
if platinum_customers:
message = 'The following customers are now Platinum Customers:
{}'.format(', '.join(platinum_customers))
if silver_customers:
message = 'The following customers are now Silver Customers:
{}'.format(', '.join(silver_customers))
if gold_customers:
message = 'The following customers are now Gold Customers:
{}'.format(', '.join(gold_customers))
if not platinum_customers and not silver_customers and not
gold_customers:
message = 'No customer changes made!'
ModelAdmin.message_user(request, message, level=SUCCESS)
allocate_service.short_description = 'Allocate Service'
我想运行代码的这一部分以确定Service Level的值：
if feat_list() <= 11:
customer.Service_Level = Service.objects.get(service_name = 'Silver Package')
silver_customers.append(customer.Name)
elif 11 < feat_list() <= 15:
customer.Service_Level = Service.objects.get(service_name = 'Gold Package')
gold_customers.append(customer.Name)
elif feat_list() > 15:
customer.Service_Level = Service.objects.get(service_name = "Platinum Package")
platinum_customers.append(customer.Name)
else:
customer.Service_Level = Service.objects.get(service_name = "No Service Package")
non_customers.append(customer.name)
customer.save()
问题在于它为每个查询集提供Service Level Silver Packages即使我已经自定义编辑了一些以获得Platinum or Gold Packages。我不确定这个块究竟出了什么问题。它正在运行但提供了一个不需要的输出
答案 0 :(得分：0)
我认为代码应该在每个函数上使用你的装饰器，否则你只是将get age评估为可操作的。
这就是为什么你得到一个低于11的分数，所以你最终得到了silver_customers。 打印总变量非常重要，因此很容易跟踪结果：
# This class allows function addition, multiplication, division
etc.
class operable:
def __init__(self, f):
self.f = f
def __call__(self, x):
return self.f(x)
def op_to_function_op(op):
def function_op(self, operand):
def f(x):
return op(self(x), operand(x))
return operable(f)
return function_op
for name, op in [(name, getattr(operator, name)) for name in
dir(operator) if "__" in name]:
try:
op(1,2)
except TypeError:
pass
else:
setattr(operable, name, op_to_function_op(op))
def allocate_service(ModelAdmin, request, queryset):
platinum_customers = []
silver_customers = []
gold_customers = []
non_customers = []
message = ''
for customer in queryset:
@operable
def getAge():
age = 0
if customer.Age == Customer.objects.get(Age = "60 +"):
age = 0
elif customer.Age == Customer.objects.get(Age = "36 - 59"):
age = 1
else:
age = 2
return age
@operable
def getEducation():
education = 0
if customer.Education == Customer.objects.get(Education =
"Highschool and below"):
education = 0
else:
education = 1
return education
@operable
def getEmployment():
employment = 0
if customer.Employment == Customer.objects.get(Employment =
"Student"):
employment = 0
elif customer.Employment == Customer.objects.get(Employment =
"Contract"):
employment = 1
else:
employment = 2
return employment
@operable
def getStability():
stability = 0
if customer.Employer_Stability ==
Customer.objects.get(Employer_Stability = "Unstable"):
stability = 0
else:
stability = 1
return stability
@operable
def getResidential():
residential = 0
if customer.Residential_Status ==
Customer.objects.get(Residential_Status = "Rented"):
residential = 0
else:
residential = 1
return residential
@operable
def getSalary():
salary = 0
if customer.Salary == Customer.objects.get(Salary <= 1000):
salary = 0
elif customer.Salary == Customer.objects.get(Salary <= 10001 and
Salary > 1000):
salary = 1
else:
salary = 2
return salary
@operable
def getLoyalty():
loyalty = 0
loy = Customer.objects.get(Customer_Loyalty <= 2)
if customer.Customer_Loyalty == loy.Customer_Loyalty:
loyalty = 0
else:
loyalty = 1
return loyalty
@operable
def getBalance():
balance = 0
if customer.Balance == Customer.objects.get(Balance <= 2500):
balance = 0
elif customer.Balance == Customer.objects.get(Balance <= 10001
and Balance > 2500):
balance = 1
else:
balance = 2
return balance
def feat_list():
total = getAge + getEducation + getEmployment + getStability +
getResidential + getSalary + getLoyalty + getBalance
print('total:' + total)
return total
if feat_list() <= 11:
customer.Service_Level = Service.objects.get(service_name =
'Silver Package')
silver_customers.append(customer.Name)
elif 11 < feat_list() <= 15:
customer.Service_Level = Service.objects.get(service_name =
'Gold Package')
gold_customers.append(customer.Name)
elif feat_list() > 15:
customer.Service_Level = Service.objects.get(service_name =
"Platinum Package")
platinum_customers.append(customer.Name)
else:
customer.Service_Level = Service.objects.get(service_name = "No
Service Package")
non_customers.append(customer.name)
customer.save()
if platinum_customers:
message = 'The following customers are now Platinum Customers:
{}'.format(', '.join(platinum_customers))
if silver_customers:
message = 'The following customers are now Silver Customers:
{}'.format(', '.join(silver_customers))
if gold_customers:
message = 'The following customers are now Gold Customers:
{}'.format(', '.join(gold_customers))
if not platinum_customers and not silver_customers and not
gold_customers:
message = 'No customer changes made!'
ModelAdmin.message_user(request, message, level=SUCCESS)
allocate_service.short_description = 'Allocate Service'