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Issue #18192: Introduce importlib.util.MAGIC_NUMBER and document the

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deprecation of imp.get_magic().
This commit is contained in:
Brett Cannon 2013-06-14 19:02:34 -04:00
parent 4d7056258b
commit 05a647deed
8 changed files with 37 additions and 8 deletions
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8
Lib/importlib/_bootstrap.py
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@ -383,8 +383,8 @@ def _call_with_frames_removed(f, *args, **kwds):
# longer be understood by older implementations of the eval loop (usually
# due to the addition of new opcodes).
_MAGIC_BYTES = (3280).to_bytes(2, 'little') + b'\r\n'
_RAW_MAGIC_NUMBER = int.from_bytes(_MAGIC_BYTES, 'little') # For import.c
MAGIC_NUMBER = (3280).to_bytes(2, 'little') + b'\r\n'
_RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little') # For import.c
_PYCACHE = '__pycache__'
@ -663,7 +663,7 @@ def _validate_bytecode_header(data, source_stats=None, name=None, path=None):
magic = data[:4]
raw_timestamp = data[4:8]
raw_size = data[8:12]
if magic != _MAGIC_BYTES:
if magic != MAGIC_NUMBER:
message = 'bad magic number in {!r}: {!r}'.format(name, magic)
_verbose_message(message)
raise ImportError(message, **exc_details)
@ -711,7 +711,7 @@ def _compile_bytecode(data, name=None, bytecode_path=None, source_path=None):
def _code_to_bytecode(code, mtime=0, source_size=0):
"""Compile a code object into bytecode for writing out to a byte-compiled
file."""
data = bytearray(_MAGIC_BYTES)
data = bytearray(MAGIC_NUMBER)
data.extend(_w_long(mtime))
data.extend(_w_long(source_size))
data.extend(marshal.dumps(code))