Issue #13959: Re-implement imp.source_from_cache() in Lib/imp.py.
diff --git a/Lib/imp.py b/Lib/imp.py
index 99d8ff7..dbec8d3 100644
--- a/Lib/imp.py
+++ b/Lib/imp.py
@@ -13,7 +13,7 @@
# Could move out of _imp, but not worth the code
from _imp import get_magic
# Can (probably) move to importlib
-from _imp import (get_tag, get_suffixes, source_from_cache)
+from _imp import (get_tag, get_suffixes)
# Should be re-implemented here (and mostly deprecated)
from _imp import (find_module, NullImporter,
SEARCH_ERROR, PY_SOURCE, PY_COMPILED, C_EXTENSION,
@@ -27,6 +27,26 @@
import os
+def source_from_cache(path):
+ """Given the path to a .pyc./.pyo file, return the path to its .py file.
+
+ The .pyc/.pyo file does not need to exist; this simply returns the path to
+ the .py file calculated to correspond to the .pyc/.pyo file. If path does
+ not conform to PEP 3147 format, ValueError will be raised.
+
+ """
+ head, pycache_filename = os.path.split(path)
+ head, pycache = os.path.split(head)
+ if pycache != _bootstrap.PYCACHE:
+ raise ValueError('{} not bottom-level directory in '
+ '{!r}'.format(_bootstrap.PYCACHE, path))
+ if pycache_filename.count('.') != 2:
+ raise ValueError('expected only 2 dots in '
+ '{!r}'.format(pycache_filename))
+ base_filename = pycache_filename.partition('.')[0]
+ return os.path.join(head, base_filename + _bootstrap.SOURCE_SUFFIXES[0])
+
+
class _HackedGetData:
"""Compatibiilty support for 'file' arguments of various load_*()
@@ -55,6 +75,7 @@
"""Compatibility support for implementing load_source()."""
+# XXX deprecate after better API exposed in importlib
def load_source(name, pathname, file=None):
return _LoadSourceCompatibility(name, pathname, file).load_module(name)
@@ -65,10 +86,12 @@
"""Compatibility support for implementing load_compiled()."""
+# XXX deprecate
def load_compiled(name, pathname, file=None):
return _LoadCompiledCompatibility(name, pathname, file).load_module(name)
+# XXX deprecate
def load_package(name, path):
if os.path.isdir(path):
extensions = _bootstrap._suffix_list(PY_SOURCE)
@@ -82,6 +105,7 @@
return _bootstrap._SourceFileLoader(name, path).load_module(name)
+# XXX deprecate
def load_module(name, file, filename, details):
"""Load a module, given information returned by find_module().