change print, change no argument behavior

gpxcsv/__init__.py

@@ -153,7 +153,7 @@ def _list_to_csv(self, list_of_dicts, csv_file):
             for row in list_of_dicts:
                 mywriter.writerow(row)
         self._check_verbose_print(
-            f"CSV {csv_file} written with {len(list_of_dicts)} rows",
+            f"CSV {csv_file} written to {csv_file} with {len(list_of_dicts)} rows",
             force=True)
         if self.verbose:
             #leaving this in an if statement because of the column formatting for now

gpxcsv/__main__.py

@@ -1,11 +1,20 @@
 import glob
 import argparse
+import sys
+
 from . import GpxCSV
 
 
+class MyParser(argparse.ArgumentParser):
+    def error(self, message):
+        sys.stderr.write('error: %s\n' % message)
+        self.print_help()
+        sys.exit(2)
+
+
 def main():
     """Main function for command line utility"""
-    parser = argparse.ArgumentParser()
+    parser = MyParser()
     parser.add_argument(
         'input_file',
         nargs='+',