[Pythonmac-SIG] Re: I stand corrected on BBEdit Python Filters

[Mark Day]

On Wednesday, December 18, 2002, at 05:50  PM, Daniel Lord wrote:

> So naturally, I used the same construct for Python filter for BBEdit,
>
> 		while 1:                              # use standard streams
> 			line = sys.stdin.readline() 					if not line:
> 				break
>
> in order read standard input since the Perl filters use the Perlish 
> construct for stdin,
>
> 	while(<>) {
>
> But the Python one doesn't work at all--not a character comes through. 
> So I figured it was broken or unsupported.
> But...I was mistaken. I had somehow 'lost' (overlooked is a more harsh 
> but more true description) the Python filter example which uses:
>
> 	for my_line in fileinput.input():
>
> to access the selected text. While I am not sure why one works but the 
> other doesn't--they both should IMHO, I am just glad someone pointed 
> out my error before I berated someone at BBEdit and then had to eat 
> crow. I'd rather have a more palatable bird for Christmas dinner.

BBEdit runs your filter with the input in a temporary file passed as an 
argument (not standard input).  To see it in action, try the following 
trivial Python filter:
	import sys
	print sys.argv

I think the Perl <> construct reads from the filenames given as 
arguments, or standard input if there were no arguments.

-Mark