What is the best way to print the usage string ?

[Leonel Gayard]

Hi all,

I had to write a small script, and I did it in python instead of
shell-script. My script takes some arguments from the command line,
like this.

import sys
args = sys.argv[1:]
if args == []:
	print """Concat: concatenates the arguments with a colon (:) between them
Usage: concat arg1 [arg2...]
Example: concat a b c prints \"a.jar:b.jar:c/\""""
	sys.exit(1)
print reduce(lambda x, y: x + ':' + y, sys.argv[1:])

Notice that the string messes the indentation in my script. The
indentation is correct, and if the script is invoked without
arguments, the usage string is printed correctly.

Now, how can I achieve the same result while keeping a clean
indentation ? How is this done in python world ? In C, I would do
this:

;; This buffer is for notes you don't want to save, and for Lisp evaluation.
;; If you want to create a file, visit that file with C-x C-f,
;; then enter the text in that file's own buffer.

if (argc < N) {
    printf("Usage: blah blah blah\n"
            "Some more lines in the usage text\n"
            "Some more lines here too\n");
    exit(1);
}

The whitespace at the beginning of the string helps me keep the
indentation clean, and the construct "a" "b" is syntactic sugar that
allows me to create a large string without concatenating them at
runtime.

How can I get this in Python ?

[]'s
Leonel