RegExp implementation as alternative solution

Signed-off-by: ABCbum <kimlong221002@gmail.com>

whipper/command/cd.py

@@ -22,6 +22,7 @@
 import cdio
 import importlib.util
 import os
+import re
 import glob
 import logging
 from whipper.command.basecommand import BaseCommand
@@ -335,17 +336,13 @@ def handle_arguments(self):
                 logger.critical(msg)
                 raise ValueError(msg)
 
-        try:
+        if re.fullmatch(r'^[0-9]+', self.options.max_tries):
             self.options.max_tries = int(self.options.max_tries)
-            if(self.options.maxtries < 0):
-                logger.warning("--max-tries is a negative number, whipper "
-                               "will change it to positive")
-                self.options.maxtries = 0 - self.options.max_tries
-            elif(self.options.max_tries == 0):
+            if self.options.max_tries == 0:
                 self.options.max_tries = float("inf")
-        except ValueError as e:
+        else:
             msg = ("Invalid number of max tries specified using the "
-                   "--max-tries argument: %s") % e
+                   "--max-tries argument: %s") % self.options.max_tries
             logger.critical(msg)
             raise ValueError(msg)