python · markshannon · Nov 12, 2020 · Nov 12, 2020
diff --git a/Lib/importlib/_bootstrap_external.py b/Lib/importlib/_bootstrap_external.py
@@ -278,6 +278,7 @@ def _write_atomic(path, data, mode=0o666):
 #     Python 3.9a2  3424 (simplify bytecodes for *value unpacking)
 #     Python 3.9a2  3425 (simplify bytecodes for **value unpacking)
 #     Python 3.10a1 3430 (Make 'annotations' future by default)
+#     Python 3.10a1 3431 (New line number table format -- PEP 626)

 #
 # MAGIC must change whenever the bytecode emitted by the compiler may no
@@ -287,7 +288,7 @@ def _write_atomic(path, data, mode=0o666):
 # Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
 # in PC/launcher.c must also be updated.

-MAGIC_NUMBER = (3430).to_bytes(2, 'little') + b'\r\n'
+MAGIC_NUMBER = (3431).to_bytes(2, 'little') + b'\r\n'
 _RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little')  # For import.c

 _PYCACHE = '__pycache__'

diff --git a/PC/launcher.c b/PC/launcher.c
@@ -1248,6 +1248,7 @@ static PYC_MAGIC magic_values[] = {
    { 3390, 3399, L"3.7" },
    { 3400, 3419, L"3.8" },
    { 3420, 3429, L"3.9" },
+    { 3430, 3439, L"3.10" },
    { 0 }
 };