How to check existence of an attribute in an object in python?

Question

I have to determine whether some object has an attribute or not. I am working on a jira application to perform some tasks and when I get the information of the worklog author name it gives below mentioned error in some cases.

worklog.author.displayName
type object 'PropertyHolder' has no attribute 'displayName'

How to check if the workplog.author has displayName property or not?

Answer 1

hasattr is a method used for checking the existence of an attribute in an object.

Example -

if hasattr(objRef, 'propName'):
    objRef.propName

You can simply use the code below to check the existence of attribute 'displayname' and if it doesn't exists then use value of name as there is always a name attribute with this field you have mentioned in the question.

display_name = worklog.author.displayName if hasattr(worklog.author, "displayName") else worklog.author.name