default list of files from () to None, and explicitly test for None
before defaulting to sys.argv[1:]. This means that if you pass in an
explicit empty list, it will read stdin instead of defaulting to
sys.argv[1:]. This fixes a buglet in the test script (when called
with options but without files, it chokes when it tries to interpret
the options as files).
Lawrence adds: "I suspect that this is a safe change, because I can't
imagine someone actively passing in an empty list when they want
sys.argv used."
I agree.
the writing of filters.
Typical use is:
import fileinput
for line in fileinput.input():
process(line)
This iterates over the lines of all files listed in sys.argv[1:],
defaulting to sys.stdin if the list is empty or when a filename is
'-'.
There is also an option to use this to direct the output back to the
input files.
Jack Jansen
Skip Montanaro
Walter Dörwald
Tim Peters
Raymond Hettinger
Guido van Rossum
Neil Schemenauer