I don't know that it was. It does simplify some conditional statements by moving the assignment into the comparison expression.
ifvalue:=will_this_return():print(f"Do something with {value}")
Without the walrus operator, we'd have to add additional code and complexity for no immediate benefit:
value=will_this_return()ifvalue:print(f"Do something with {value}")
That's a simplistic example, of course, but it demonstrates a situation that more robust code sometimes encounters.
I've learned not to dismiss a tool or feature as "unnecessary" just because I can't think of a use case myself; doing so would be quite presumptive on my part!
I don't know that it was. It does simplify some conditional statements by moving the assignment into the comparison expression.
Without the walrus operator, we'd have to add additional code and complexity for no immediate benefit:
That's a simplistic example, of course, but it demonstrates a situation that more robust code sometimes encounters.
I've learned not to dismiss a tool or feature as "unnecessary" just because I can't think of a use case myself; doing so would be quite presumptive on my part!
PEP 572 includes some notes by Tim Peters on which situations are well-suited to the walrus operator, and which are not.