Access Python enum value from class method

Question

I have an Enum as follows:

class RequestMethodVerbMapping(Enum):
    POST = 'Create'
    PUT = 'Update'
    DELETE = 'Delete'

Now, in order to access the string associated with a certain HTTP verb, I do the following:

In [19]: RequestMethodVerbMapping.POST.value                                                                                                                                                                                                                             
Out[19]: 'Create'

Works as expected.However, now the HTTP verb is a class attribute and I want to access the enum in a class method. I did the following:

import RequestMethodVerbMapping

class BaseWorkFlow:
    def __init__(self, request_method):
        self.request_method = request_method

def print_enum(self):
    print (RequestMethodVerbMapping.self.request_method.value)

However, this does not work and gives me an error:

AttributeError: self

What am i doing wrong ?

alecxe · Accepted Answer · 2018-12-18 05:37:56Z

1

getattr() to get the Enum value by the attribute name should do the job:

def print_enum(self):
    print(getattr(RequestMethodVerbMapping, self.request_method).value)

edited Dec 18, 2018 at 5:37

answered Dec 18, 2018 at 5:33

alecxe

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2 Comments

Amistad Over a year ago

No..request_method is not an enum..request_method is actually Django's request method which returns POST,PUT etc. I then use that to find the appropriate string using my Enum..

alecxe Over a year ago

@Amistad gotcha, how about this version?

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