Improve performance by skipping unnecessary normalisation (#3751)

[etc/vim.git] / src / blib2to3 / pgen2 / conv.py

diff --git a/src/blib2to3/pgen2/conv.py b/src/blib2to3/pgen2/conv.py
index 78165217a1b0ebb777c522a56a480c51278aa53f..04eccfa1d4b6ac10b3d264b8fff0b494b8849549 100644 (file)
--- a/src/blib2to3/pgen2/conv.py
+++ b/src/blib2to3/pgen2/conv.py
@@ -29,7 +29,7 @@ without having to invoke the Python pgen C program.
 """
 
 # Python imports
-import regex as re
+import re
 
 # Local imports
 from pgen2 import grammar, token
@@ -63,7 +63,7 @@ class Converter(grammar.Grammar):
         try:
             f = open(filename)
         except OSError as err:
-            print("Can't open %s: %s" % (filename, err))
+            print(f"Can't open {filename}: {err}")
             return False
         self.symbol2number = {}
         self.number2symbol = {}
@@ -72,7 +72,7 @@ class Converter(grammar.Grammar):
             lineno += 1
             mo = re.match(r"^#define\s+(\w+)\s+(\d+)$", line)
             if not mo and line.strip():
-                print("%s(%s): can't parse %s" % (filename, lineno, line.strip()))
+                print(f"{filename}({lineno}): can't parse {line.strip()}")
             else:
                 symbol, number = mo.groups()
                 number = int(number)
@@ -113,7 +113,7 @@ class Converter(grammar.Grammar):
         try:
             f = open(filename)
         except OSError as err:
-            print("Can't open %s: %s" % (filename, err))
+            print(f"Can't open {filename}: {err}")
             return False
         # The code below essentially uses f's iterator-ness!
         lineno = 0