From c663acc4ed8e7d2a9e4389a3e8f790d60a070a0c Mon Sep 17 00:00:00 2001
From: Egor Tensin <egor@tensin.name>
Date: Thu, 18 Jun 2026 16:54:00 +0200
Subject: use format strings

---
 algorithms/algorithm.py    | 1 -
 algorithms/input_kind.py   | 2 +-
 algorithms/params.py       | 6 +++---
 algorithms/scripts/plot.py | 8 ++++----
 algorithms/scripts/test.py | 6 +++---
 5 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/algorithms/algorithm.py b/algorithms/algorithm.py
index 55d4929..ebbd559 100644
--- a/algorithms/algorithm.py
+++ b/algorithms/algorithm.py
@@ -14,7 +14,6 @@ class Algorithm:
 
     @staticmethod
     def gen_input(n, case=input_kind.InputKind.AVERAGE):
-        # raise NotImplementedError('input generation is not defined for a generic algorithm')
         return input_kind.gen_input_for_sorting(n, case)
 
 
diff --git a/algorithms/input_kind.py b/algorithms/input_kind.py
index b91d298..68a93d8 100644
--- a/algorithms/input_kind.py
+++ b/algorithms/input_kind.py
@@ -30,4 +30,4 @@ def gen_input_for_sorting(n, case=InputKind.AVERAGE):
         return _gen_input_from(sample(range(n), n))
     if case is InputKind.WORST:
         return _gen_input_from(range(n - 1, -1, -1))
-    raise NotImplementedError("invalid input kind: " + str(case))
+    raise NotImplementedError(f"invalid input kind: {case}")
diff --git a/algorithms/params.py b/algorithms/params.py
index 818ca47..fb5af6f 100644
--- a/algorithms/params.py
+++ b/algorithms/params.py
@@ -24,7 +24,7 @@ class TimeUnits(Enum):
             return 1000.0
         if self is TimeUnits.MICROSECONDS:
             return 1000000.0
-        raise NotImplementedError("invalid time units: " + str(self))
+        raise NotImplementedError(f"invalid time units: {self}")
 
     def __str__(self):
         return self.value
@@ -109,10 +109,10 @@ class AlgorithmParameters:
 
     @staticmethod
     def _format_plot_ylabel(units):
-        return "Running time ({})".format(units)
+        return f"Running time ({units})"
 
     def _format_plot_title(self):
-        return "{}, {} case".format(self.algorithm.display_name, self.input_kind)
+        return f"{self.algorithm.display_name}, {self.input_kind} case"
 
     def _format_plot_suptitle(self):
         return self.algorithm.display_name
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():
diff --git a/algorithms/scripts/test.py b/algorithms/scripts/test.py
index 52acc34..7fd7c68 100755
--- a/algorithms/scripts/test.py
+++ b/algorithms/scripts/test.py
@@ -30,7 +30,7 @@ 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
@@ -40,11 +40,11 @@ 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():
-- 
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