A few missed renamings to pycache_prefix.

Author: carljm

Doc/library/sys.rst

@@ -215,9 +215,9 @@ always available.
    files to (and read them from) a parallel directory tree rooted at this
    directory, rather than from ``__pycache__`` directories in the source code
    tree. Any ``__pycache__`` directories in the source code tree will be ignored
-   and new `.pyc` files written within the bytecode prefix. Thus if you use
+   and new `.pyc` files written within the pycache prefix. Thus if you use
    :mod:`compileall` as a pre-build step, you must ensure you run it with the
-   same bytecode prefix (if any) that you will use at runtime.
+   same pycache prefix (if any) that you will use at runtime.
 
    A relative path is interpreted relative to the current working directory.
 

Lib/importlib/_bootstrap_external.py

@@ -363,13 +363,13 @@ def source_from_cache(path):
         raise NotImplementedError('sys.implementation.cache_tag is None')
     path = _os.fspath(path)
     head, pycache_filename = _path_split(path)
-    found_in_bytecode_prefix = False
+    found_in_pycache_prefix = False
     if sys.pycache_prefix is not None:
         stripped_path = sys.pycache_prefix.rstrip(path_separators)
         if head.startswith(stripped_path + path_sep):
             head = head[len(stripped_path):]
-            found_in_bytecode_prefix = True
-    if not found_in_bytecode_prefix:
+            found_in_pycache_prefix = True
+    if not found_in_pycache_prefix:
         head, pycache = _path_split(head)
         if pycache != _PYCACHE:
             raise ValueError(f'{_PYCACHE} not bottom-level directory in '

Misc/NEWS.d/next/Core and Builtins/2018-05-15-10-48-47.bpo-33499.uBEc06.rst

@@ -1,3 +1,3 @@
-Add :envvar:`PYTHONBYTECODEPREFIX` environment variable and :option:`-X`
-``bytecode_prefix`` command-line option to set an alternate root directory for
+Add :envvar:`PYTHONPYCACHEPREFIX` environment variable and :option:`-X`
+``pycache_prefix`` command-line option to set an alternate root directory for
 writing module bytecode cache files.