use format strings

1 files changed, 4 insertions, 4 deletions

diff --git a/algorithms/scripts/plot.py b/algorithms/scripts/plot.py
index 25a87f7..61eeab1 100755
--- a/algorithms/scripts/plot.py
+++ b/algorithms/scripts/plot.py
@@ -40,7 +40,7 @@ def _parse_non_negative_integer(s):
     try:
         n = int(s)
     except ValueError:
-        raise argparse.ArgumentTypeError("must be a non-negative integer: " + str(s))
+        raise argparse.ArgumentTypeError(f"must be a non-negative integer: {s}")
     if n < 0:
         raise argparse.ArgumentTypeError("must be a non-negative integer")
     return n
@@ -50,7 +50,7 @@ def _parse_positive_integer(s):
     try:
         n = int(s)
     except ValueError:
-        raise argparse.ArgumentTypeError("must be a positive integer: " + str(s))
+        raise argparse.ArgumentTypeError(f"must be a positive integer: {s}")
     if n < 1:
         raise argparse.ArgumentTypeError("must be a positive integer")
     return n
@@ -60,11 +60,11 @@ def _parse_input_kind(s):
     try:
         return InputKind(s)
     except ValueError:
-        raise argparse.ArgumentTypeError("invalid input kind: " + str(s))
+        raise argparse.ArgumentTypeError(f"invalid input kind: {s}")
 
 
 def _format_algorithm(codename):
-    return "* {}: {}".format(codename, registry.get(codename).display_name)
+    return "* {codename}: {registry.get(codename).display_name}"
 
 
 def _format_available_algorithms():