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

[Daniel Lord]

Blake, Chris, Mark

I had been using the Pythonic construct to access stdin to try to write 
a working filter since that is what I had used to filter files from 
stdin to stdout in an abstract filter class I wrote,

# ------------------------------------------------------------------ #
#                           Abstract Class                           #
#               To use: subclass and override filterLine             #
# ------------------------------------------------------------------ #
class AbstractStreamFilter:
	def __init__(self):
		import sys                            # no explicit files
		while 1:                              # use standard streams
			line = sys.stdin.readline() 					if not line:
				break
			self.filterLine(line)

# ------------------------------------------------------------------ #
#      Overridden in class that implements this abstract class       #
# ------------------------------------------------------------------ #
	def filterLine(self, line):
		raise NotImplementedError, \
			"Abstract method filterLine(self, line) not overridden!"

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.

Daniel
--
daniellordATtelocityDOTcom
GPG Fingerprint: C59E 59F5 1C63 5CFB 6161 067E FF00 A4E8 684A 16BB

               "My  dancing, drinking, and singing weave me the mat
                upon which my soul will sleep in the world of spirits"
                                     [Old Man of Halmahera, Indonesia]