AttributeError: 'TimedeltaProperties' object has no attribute 'years' in Pandas
This workaround gets you closer.
round((df["Accident Date"] - df["Iw Date Of Birth"]).dt.days / 365, 1)
In Pandas, why does a TimedeltaProperties object have no attribute 'years'?
After all, the datetime object has this property.  
It seems like a very natural thing for an object that is concerned with time to have. Especially if it already has an hours, seconds, etc attribute.
Is there a workaround so that my column, which is full of values like
10060 days,
can be converted to years?  Or better yet, just converted to an integer representation for years?