GH-83162: Update _compiler and _constants to new exception name.

Author: achhina

Lib/re/_compiler.py

@@ -102,7 +102,7 @@ def _compile(code, pattern, flags):
                 emit(ANY)
         elif op in REPEATING_CODES:
             if flags & SRE_FLAG_TEMPLATE:
-                raise error("internal: unsupported template operator %r" % (op,))
+                raise ReCompileError(f"internal: unsupported template operator {op!r}")
             if _simple(av[2]):
                 emit(REPEATING_CODES[op][2])
                 skip = _len(code); emit(0)
@@ -150,7 +150,7 @@ def _compile(code, pattern, flags):
             else:
                 lo, hi = av[1].getwidth()
                 if lo != hi:
-                    raise error("look-behind requires fixed-width pattern")
+                    raise ReCompileError("look-behind requires fixed-width pattern")
                 emit(lo) # look behind
             _compile(code, av[1], flags)
             emit(SUCCESS)
@@ -209,7 +209,7 @@ def _compile(code, pattern, flags):
             else:
                 code[skipyes] = _len(code) - skipyes + 1
         else:
-            raise error("internal: unsupported operand type %r" % (op,))
+            raise ReCompileError(f"internal: unsupported operand type {op!r}")
 
 def _compile_charset(charset, flags, code):
     # compile charset subprogram
@@ -235,7 +235,7 @@ def _compile_charset(charset, flags, code):
             else:
                 emit(av)
         else:
-            raise error("internal: unsupported set operator %r" % (op,))
+            raise ReCompileError(f"internal: unsupported set operator {op!r}")
     emit(FAILURE)
 
 def _optimize_charset(charset, iscased=None, fixup=None, fixes=None):

Lib/re/_constants.py

@@ -17,10 +17,10 @@
 
 from _sre import MAXREPEAT, MAXGROUPS
 
-# SRE standard exception (access as sre.error)
+# SRE standard exception (access as sre.ReCompileError)
 # should this really be here?
 
-class error(Exception):
+class ReCompileError(Exception):
     """Exception raised for invalid regular expressions.
 
     Attributes:
@@ -53,6 +53,9 @@ def __init__(self, msg, pattern=None, pos=None):
         super().__init__(msg)
 
 
+# Backward compatibility after renaming in 3.12
+error = ReCompileError
+
 class _NamedIntConstant(int):
     def __new__(cls, value, name):
         self = super(_NamedIntConstant, cls).__new__(cls, value)