Assignment and comparison in one statement

[Johannes Bauer]

Carl Banks schrieb:

> p = myfunction()
> if p:
>     print p
> 
> (I recommend doing it this way in C, too.)

This is okay for if-clauses, but sucks for while-loops:

while (fgets(buf, sizeof(buf), f)) {
	printf("%s\n", buf);
}

is much shorter than

char *tmp;
tmp = fgets(buf, sizeof(buf), f);
while (tmp) {
	printf("%s\n", buf);
	tmp = fgets(buf, sizeof(buf), f);
}

> For the case where you want to do this in an elif-clause, look for the
> recent thread "C-like assignment expression?" which list some
> workarounds.  Or just Google this newsgroup for "assignment
> expression".  It's one of few minor irritating things in Python
> syntax.

Alright, I will. Thanks.

Regards,
Johannes

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reicht zu wissen, daß andere es besser können und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>