Distinguish reverse.py, reversed.py.

reverse.py

@@ -1,7 +1,22 @@
+'''
+Reverse a string.
+'''
+import argparse
 import sys
 
 from voussoirkit import clipext
 
-arg = clipext.resolve(sys.argv[1])
-arg = ''.join(reversed(arg))
-print(arg)
+def reverse_argparse(args):
+    print(''.join(reversed(args.string)))
+
+def main(argv):
+    parser = argparse.ArgumentParser(description=__doc__)
+
+    parser.add_argument('string')
+    parser.set_defaults(func=reverse_argparse)
+
+    args = parser.parse_args(argv)
+    return args.func(args)
+
+if __name__ == '__main__':
+    raise SystemExit(main(sys.argv[1:]))

reversed.py

@@ -0,0 +1,25 @@
+'''
+Print input lines in reverse order.
+'''
+import argparse
+import sys
+
+from voussoirkit import clipext
+
+def reverse_argparse(args):
+    lines = clipext.resolve(args.lines)
+    lines = lines.splitlines()
+    lines = reversed(lines)
+    print('\n'.join(lines))
+
+def main(argv):
+    parser = argparse.ArgumentParser(description=__doc__)
+
+    parser.add_argument('lines')
+    parser.set_defaults(func=reverse_argparse)
+
+    args = parser.parse_args(argv)
+    return args.func(args)
+
+if __name__ == '__main__':
+    raise SystemExit(main(sys.argv[1:]))