How to compare two fields from two different feature classes in arcpy

[SuryaNarayana]

Hi Users,

I have two feature classes, i.e FC1 with fields [C_PIN, IsSelected], and FC2 with field [PIN].  Now I want to update the field values of [IsSelected] for the rows in which [C_PIN] and [PIN] are same.

Please share any sample code for my requirement.

Thank you in advance. 

[JoeBorgione]

I've been using this approach lately; it works really well:  /blogs/richard_fairhurst/2014/11/08/turbo-charging-data-manipulation-with-python-cursors-and-diction... 

In these two threads I show examples:

RuntimeError: ERROR 999998: Unexpected Error in Set null function 

https://community.esri.com/thread/235543-arcpy-update-cursor-ifelse 

You don't specify what you are going to update; is it all fields where CPIN= PIN? or just a field or two? And what values ar going into that field or feilds?  If FC 2 has the field values you are looking for, this technique is the bomb....

[SuryaNarayana]

Thank you very much Joe, the articles helped me to complete my task.