On Tue, 29 Mar 2022 at 09:53, Ethan Furman <et...@stoneleaf.us> wrote:
>
> In the following bit of code:
>
>
> while s := input.read(MAXBINSIZE):
> while len(s) < MAXBINSIZE and ns := input.read(MAXBINSIZE-len(s)):
> s += ns
> line = binascii.b2a_base64(s)
> output.write(line)
>
> I'm getting this error on the second line:
>
> cannot use assignment expressions with expression
>
> Can somebody explain why that isn't working?
>
I'm getting a good hint from the exception in 3.11:
>>> while len(s) < MAXBINSIZE and ns := input.read(MAXBINSIZE-len(s)):
File "<stdin>", line 1
while len(s) < MAXBINSIZE and ns := input.read(MAXBINSIZE-len(s)):
^^^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: cannot use assignment expressions with expression
Looks like it's counting "len(s) < MAXBINSIZE and ns" as the
assignment target. Parens around the second half would solve that.
ChrisA
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