In my work we have code in many places along the lines of: data = expensive_function(blah, blah_blah) if data: # many lines of processing

In my work we have code in many places along the lines of: data = expensive_function(blah, blah_blah) if data: # many lines of processing data = expensive_function(blah, blah_bah) And seen a lot of times where newcomers forget the assingment at the end that makes everything move. So yeah, the walrus version would be a lot simpler: while data := expensive_function(blah, blah_blah): # process data This is just one of the "edge cases" where the walrus makes sense.