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Raymond Hettinger 9e456bc70e bpo-36018: Add properties for mean and stdev (GH-12022) 
Responding to suggestions on the tracker and some off-line suggestions.

Davin suggested that english named accessors instead of greek letters would result in more intelligible user code. Steven suggested that the parameters still need to be *mu* and *theta* which are used elsewhere (and I noted those parameter names are used in linked-to resources). 

Michael suggested proving-out the API by seeing whether it generalized to *Lognormal*.  I did so and found that Lognormal distribution parameters *mu* and *sigma*  do not represent the mean and standard deviation of the lognormal distribution (instead, they are for the underlying regular normal distribution).

Putting these ideas together, we have NormalDist parameterized by *mu* and *sigma* but offering English named properties for accessors.  That gives lets us match other API that access mu and sigma, it matches the external resources on the topic, gives us clear english names in user code. The API extends nicely to LogNormal where the parameters and the summary statistic accessors are not the same.


https://bugs.python.org/issue36018
2019-02-24 11:44:55 -08:00
..
asyncio asyncio: use dict instead of OrderedDict (GH-11710) 2019-02-05 17:04:40 +09:00
collections bpo-36057 Update docs and tests for ordering in collections.Counter [no behavior change] (#11962) 2019-02-21 09:19:00 -08:00
concurrent bpo-35133: Fix mistakes when concatenate string literals on different lines. (GH-10284) 2018-11-05 16:20:25 +02:00
ctypes bpo-27643 - skip test_ctypes test case with XLC compiler. (GH-5164) 2018-12-26 13:54:22 +10:00
curses Issue #13051: Fixed recursion errors in large or resized curses.textpad.Textbox. 2016-12-28 10:16:06 +02:00
dbm bpo-33106: change dbm key deletion error for readonly file from KeyError to dbm.error (#6295) 2018-12-12 20:46:55 +08:00
distutils bpo-35299: Fixed sysconfig and distutils during PGO profiling (GH-11744) 2019-02-04 17:15:13 -08:00
email email: use dict instead of OrderedDict (GH-11709) 2019-02-05 17:05:43 +09:00
encodings Remove obsolete comment about latin-1 in normalize_encoding (GH-8739) 2018-09-10 17:54:37 -07:00
ensurepip Upgrade pip to 18.1 and setuptools to 40.6.2 (#10598) 2018-11-19 07:41:52 -05:00
html bpo-30629: Remove second call of str.lower() in html.parser.parse_endtag. (#2099) 2017-06-16 21:15:25 -04:00
http bpo-24209: In http.server script, rely on getaddrinfo to bind to preferred address based on the bind parameter. (#11767) 2019-02-07 08:22:45 -05:00
idlelib bpo-24310: Document IDLE settings dialog font tab sample (GH-12007) 2019-02-23 23:04:53 -05:00
importlib bpo-35887: Add make regen-importlib step to importlib._bootstrap docstring (GH-11777) 2019-02-13 15:21:17 -08:00
json bpo-31553: add --json-lines option to json.tool (#10051) 2018-11-07 12:09:32 +02:00
lib2to3 bpo-35312: Make lib2to3.pgen2.parse.ParseError round-trip pickle-able. (GH-10710) 2018-11-27 20:39:49 +02:00
logging bpo-35726: Prevented QueueHandler formatting from affecting other handlers (GH-11537) 2019-01-23 07:08:38 +00:00
msilib bpo-34251: Restore msilib.Win64 to preserve compatibility (GH-8510) 2018-07-28 16:02:56 -05:00
multiprocessing bpo-35813: Tests and docs for shared_memory (#11816) 2019-02-23 22:08:16 -06:00
pydoc_data [pydoc] Regenerate topics for v3.8.0a1 2019-02-03 14:04:12 +01:00
site-packages Issue #29283: Delete accidentally added Lib/site-packages/README 2017-01-30 13:55:49 +03:00
sqlite3 bpo-35504: Fix segfaults and SystemErrors when deleting certain attrs. (GH-11175) 2018-12-17 16:52:45 +02:00
test bpo-36018: Add properties for mean and stdev (GH-12022) 2019-02-24 11:44:55 -08:00
tkinter bpo-27313: Avoid test_ttk_guionly ComboboxTest fail with macOS Cocoa Tk (GH-12011) 2019-02-24 02:28:24 -05:00
turtledemo turtledemo/penrose.py: remove unused clock() calls (GH-10033) 2018-10-25 00:43:39 +02:00
unittest bpo-35512: Resolve string target to patch.dict decorator during function call GH#12000 2019-02-24 18:54:49 +00:00
urllib closes bpo-35309: cpath should be capath (GH-10699) 2018-11-25 12:32:50 -06:00
venv bpo-35872 and bpo-35873: Clears __PYVENV_LAUNCHER__ variable (GH-11745) 2019-02-03 23:19:38 -08:00
wsgiref bpo-35565: Add detail to assertion failure message in wsgiref (GH-11293) 2018-12-25 15:19:11 -08:00
xml bpo-35052: Fix handler on xml.dom.minidom.cloneNode() (GH-11061) 2018-12-10 11:12:53 +01:00
xmlrpc bpo-35153: Add headers parameter to xmlrpc.client.ServerProxy (GH-10308) 2019-02-19 17:18:50 +01:00
__future__.py bpo-35526: make __future__.barry_as_FLUFL mandatory for Python 4.0 (#11218) 2018-12-19 08:19:39 -08:00
__phello__.foo.py
_bootlocale.py bpo-29240: PEP 540: Add a new UTF-8 Mode (#855) 2017-12-13 12:29:09 +01:00
_collections_abc.py bpo-34427: Fix infinite loop when calling MutableSequence.extend() on self (GH-8813) 2018-08-30 09:56:14 -07:00
_compat_pickle.py bpo-35224: PEP 572 Implementation (#10497) 2019-01-24 16:49:56 -07:00
_compression.py
_dummy_thread.py Restore dummy_threading and _dummy_thread, but deprecate them (bpo-31370) (#3648) 2017-09-18 22:04:20 +02:00
_markupbase.py
_osx_support.py bpo-35257: Avoid leaking LTO linker flags into distutils (GH-10900) 2018-12-19 18:19:01 +01:00
_py_abc.py bpo-33018: Improve issubclass() error checking and message. (GH-5944) 2018-03-22 11:26:06 +00:00
_pydecimal.py bpo-35133: Fix mistakes when concatenate string literals on different lines. (GH-10284) 2018-11-05 16:20:25 +02:00
_pyio.py bpo-33138: Change standard error message for non-pickleable and non-copyable types. (GH-6239) 2018-10-31 02:28:07 +02:00
_sitebuiltins.py
_strptime.py bpo-33541: Remove unused __pad function (GH-4377) 2018-05-20 13:42:30 -04:00
_threading_local.py Delete a broken threading.local example (#5870) 2018-02-25 10:03:40 -05:00
_weakrefset.py bpo-30296 Remove unnecessary tuples, lists, sets, and dicts (#1489) 2017-05-18 07:35:54 -07:00
abc.py bpo-35609: Remove examples for deprecated decorators in the abc module. (GH-11355) 2018-12-31 09:56:21 +02:00
aifc.py bpo-32056: Improve exceptions in aifc, wave and sunau. (GH-5951) 2018-03-18 09:55:53 +02:00
antigravity.py Change the xkcd link in comment over https. (GH-5452) 2018-09-13 22:45:00 -07:00
argparse.py Remove superseded line from argparse.HelpFormatter() (GH-8839) 2018-08-22 23:14:14 +03:00
ast.py bpo-35766: Merge typed_ast back into CPython (GH-11645) 2019-01-31 12:40:27 +01:00
asynchat.py Issue #25002: Back out asyncore/asynchat deprecation. 2016-10-25 18:42:51 -07:00
asyncore.py bpo-29639: change test.support.HOST to "localhost" 2017-09-09 00:30:15 -07:00
base64.py bpo-34164: Fix handling of incorrect padding in base64.b32decode(). (GH-8351) 2018-07-24 12:52:51 +03:00
bdb.py bpo-34906: Doc: Fix typos (GH-9712) 2018-10-05 16:17:18 +02:00
binhex.py
bisect.py Issue #28792: Remove aliases from _bisect 2016-11-24 23:31:59 +01:00
bz2.py bpo-35128: Fix spacing issues in warning.warn() messages. (GH-10268) 2018-11-01 12:33:35 +02:00
calendar.py Closes bpo-28281: Remove year (1-9999) limits on the weekday() function. (#4109) 2017-10-26 15:34:11 -04:00
cgi.py bpo-35028: cgi: Fix max_num_fields off by one error (GH-9973) 2018-10-23 01:14:35 -07:00
cgitb.py bpo-33311: Do not display parameters displayed in parentheses for module call. (GH-6677) 2018-05-09 12:39:32 +03:00
chunk.py bpo-29762: More use "raise from None". (#569) 2017-04-05 09:37:24 +03:00
cmd.py
code.py bpo-30166: Import command-line parsing modules only when needed. (#1293) 2017-05-04 08:17:47 +03:00
codecs.py bpo-32236: open() emits RuntimeWarning if buffering=1 for binary mode (GH-4842) 2018-10-20 02:22:31 +02:00
codeop.py
colorsys.py
compileall.py bpo-29877: compileall: import ProcessPoolExecutor only when needed (GH-4856) 2018-11-23 09:06:55 -08:00
configparser.py bpo-27351: Fix ConfigParser.read() documentation and docstring (GH-8123) 2018-09-29 10:15:55 -06:00
contextlib.py bpo-33786: Fix asynchronous generators to handle GeneratorExit in athrow() (GH-7467) 2018-06-07 20:31:26 -04:00
contextvars.py bpo-32436: Implement PEP 567 (#5027) 2018-01-22 19:11:18 -05:00
copy.py bpo-11572: Make minor improvements to copy module (GH-8208) 2018-07-09 23:14:54 +03:00
copyreg.py bpo-33138: Change standard error message for non-pickleable and non-copyable types. (GH-6239) 2018-10-31 02:28:07 +02:00
cProfile.py bpo-23420: Verify the value of '-s' when execute the CLI of cProfile (GH-9925) 2018-10-17 12:03:40 +02:00
crypt.py bpo-31702: Allow to specify rounds for SHA-2 hashing in crypt.mksalt(). (#4110) 2017-11-16 13:22:51 +02:00
csv.py bpo-34003: Use dict instead of OrderedDict in csv.DictReader (GH-8014) 2019-01-31 00:47:53 -08:00
dataclasses.py bpo-35960: Fix dataclasses.field throwing away empty metadata. (GH-11815) 2019-02-12 06:50:49 -05:00
datetime.py bpo-32417: Make timedelta arithmetic respect subclasses (#10902) 2019-02-04 14:42:04 -05:00
decimal.py
difflib.py Revert "bpo-35603: Escape table header of make_table output that can cause potential XSS. (GH-11341)" (GH-11356) 2019-01-02 14:49:25 +02:00
dis.py bpo-32970: Improve disassembly of the MAKE_FUNCTION instruction. (GH-5937) 2018-03-11 11:07:06 +02:00
doctest.py bpo-24746: Avoid stripping trailing whitespace in doctest fancy diff (#10639) 2019-01-09 05:38:38 -08:00
dummy_threading.py Restore dummy_threading and _dummy_thread, but deprecate them (bpo-31370) (#3648) 2017-09-18 22:04:20 +02:00
enum.py bpo-35717: Fix KeyError exception raised when using enums and compile (GH-11523) 2019-01-24 11:43:13 -08:00
filecmp.py
fileinput.py bpo-9372: Deprecate several __getitem__ methods (GH-8609) 2018-08-11 09:05:04 +03:00
fnmatch.py bpo-32775: Fix regular expression warnings in fnmatch. (#5583) 2018-02-09 13:30:19 +02:00
formatter.py
fractions.py bpo-35588: Speed up mod, divmod and floordiv operations for Fraction type (#11322) 2019-01-02 14:22:06 +02:00
ftplib.py bpo-35128: Fix spacing issues in warning.warn() messages. (GH-10268) 2018-11-01 12:33:35 +02:00
functools.py Consistently move the misses update to just before the user function call (GH-11715) 2019-01-31 15:03:38 -08:00
genericpath.py bpo-33721: Make some os.path functions and pathlib.Path methods be tolerant to invalid paths. (#7695) 2018-09-18 11:28:51 +03:00
getopt.py
getpass.py getpass: update docstrings (#49) 2017-02-12 23:10:48 +01:00
gettext.py bpo-2504: Add pgettext() and variants to gettext. (GH-7253) 2018-11-07 16:12:20 +02:00
glob.py
gzip.py bpo-34898: Add mtime parameter to gzip.compress(). (GH-9704) 2018-11-07 11:50:23 +02:00
hashlib.py bpo-33729: Fix issues with arguments parsing in hashlib. (GH-8346) 2018-07-31 09:50:16 +03:00
heapq.py bpo-34149: Behavior of the min/max with key=None (GH-8328) 2018-07-23 20:58:21 -07:00
hmac.py bpo-33604: Remove deprecated HMAC default value marked for removal in 3.8 (GH-7063) 2018-09-10 11:10:01 -07:00
imaplib.py bpo-35128: Fix spacing issues in warning.warn() messages. (GH-10268) 2018-11-01 12:33:35 +02:00
imghdr.py
imp.py closes bpo-34056: Always return bytes from _HackedGetData.get_data(). (GH-8130) 2018-07-06 20:41:06 -07:00
inspect.py bpo-34890: Make iscoroutinefunction, isgeneratorfunction and isasyncgenfunction work with functools.partial (GH-9903) 2018-10-26 12:19:14 +01:00
io.py
ipaddress.py bpo-27683: Fix a regression for host() of ipaddress network objects (GH-6016) 2018-03-21 08:25:13 +08:00
keyword.py bpo-30406: Make async and await proper keywords (#1669) 2017-10-05 23:24:46 -04:00
linecache.py
locale.py Remove mojibake in the locale aliases mapping. (GH-6716) 2018-05-06 10:52:38 +03:00
lzma.py
mailbox.py bpo-31522: mailbox.get_string: pass from_ parameter to get_bytes (#9857) 2018-10-18 20:21:47 -04:00
mailcap.py
mimetypes.py bpo-34926: Make mimetypes.guess_type accept os.PathLike objects (GH-9777) 2018-10-10 16:46:44 +02:00
modulefinder.py closes bpo-31650: PEP 552 (Deterministic pycs) implementation (#4575) 2017-12-09 10:26:52 -08:00
netrc.py bpo-28334: netrc() now uses expanduser() to find .netrc file (GH-4537) 2017-11-25 13:37:22 +03:00
nntplib.py bpo-29762: More use "raise from None". (#569) 2017-04-05 09:37:24 +03:00
ntpath.py bpo-31047: Fix ntpath.abspath to trim ending separator (GH-10082) 2018-10-25 11:26:37 -04:00
nturl2path.py bpo-29836: Remove nturl2path from test_sundry and amend the module docstring (GH-694) 2017-03-17 11:16:20 -07:00
numbers.py Fix miscellaneous typos (#4275) 2017-11-05 15:37:50 +02:00
opcode.py bpo-33041: Rework compiling an "async for" loop. (#6142) 2018-03-23 14:34:35 +02:00
operator.py
optparse.py bpo-34605: Avoid master/slave terms (GH-9101) 2018-09-07 17:30:33 +02:00
os.py Use generator instead of list in code examples (GH-11203) 2018-12-22 19:48:14 -08:00
pathlib.py bpo-22062: Updated docstring and documentation for pathlib (GH-8519) 2019-02-11 02:47:09 -08:00
pdb.py bpo-35931: Gracefully handle SyntaxError in pdb debug command (GH-11782) 2019-02-15 12:52:53 -08:00
pickle.py bpo-11572: Make minor improvements to copy module (GH-8208) 2018-07-09 23:14:54 +03:00
pickletools.py Fix pickletools doc for NEWFALSE. (GH-9432) 2018-09-22 18:13:53 +03:00
pipes.py
pkgutil.py closes bpo-31650: PEP 552 (Deterministic pycs) implementation (#4575) 2017-12-09 10:26:52 -08:00
platform.py bpo-35516: platform.system_alias() don't replace Darwin (GH-11207) 2018-12-18 19:51:35 +01:00
plistlib.py bpo-33908: Remove two superfluous assignments (GH-7116) 2018-06-20 13:07:31 +08:00
poplib.py bpo-35128: Fix spacing issues in warning.warn() messages. (GH-10268) 2018-11-01 12:33:35 +02:00
posixpath.py bpo-35471: Remove the macpath module (GH-11129) 2018-12-14 13:37:26 +01:00
pprint.py bpo-35513, unittest: TextTestRunner uses time.perf_counter() (GH-11180) 2018-12-17 11:30:34 +01:00
profile.py bpo-32512: Add -m option to profile for profiling modules (#5132) 2018-11-05 22:03:46 +10:00
pstats.py Revert unneccessary changes made in bpo-30296 and apply other improvements. (GH-2624) 2018-02-26 16:50:11 +02:00
pty.py
py_compile.py bpo-34022: Stop forcing of hash-based invalidation with SOURCE_DATE_EPOCH (GH-9607) 2018-10-10 18:43:14 +02:00
pyclbr.py bpo-6691: Pyclbr now reports nested classes and functions. (#2503) 2017-07-03 21:31:25 -04:00
pydoc.py bpo-35619: Improve support of custom data descriptors in help() and pydoc. (GH-11366) 2019-01-15 10:53:18 +02:00
queue.py bpo-14976: Reentrant simple queue (#3346) 2018-01-16 00:27:16 +01:00
quopri.py
random.py Convert range to repeat for choices() (#11889) 2019-02-16 13:30:51 -08:00
re.py bpo-34681: Rename class Pattern in sre_parse to State. (GH-9310) 2018-09-18 09:16:26 +03:00
reprlib.py bpo-31370: Remove support for threads-less builds (#3385) 2017-09-07 18:56:24 +02:00
rlcompleter.py
runpy.py
sched.py bpo-31370: Remove support for threads-less builds (#3385) 2017-09-07 18:56:24 +02:00
secrets.py Issue #29061: secrets.randbelow() would hang with a negative input 2016-12-29 22:54:25 -07:00
selectors.py bpo-30624 remaining bare except (#2108) 2017-06-12 14:43:40 +02:00
shelve.py Fix misleading docsting of shelve.open(). (GH-6427) 2018-04-09 17:16:01 +03:00
shlex.py Fixed #29132: Updated shlex to work better with punctuation chars in POSIX mode. 2017-01-15 10:06:52 +00:00
shutil.py bpo-18283: Add support for bytes to shutil.which (GH-11818) 2019-02-13 12:25:10 +01:00
signal.py bpo-34282: Fix Enum._convert shadowing members named _convert (GH-8568) 2018-09-12 10:28:53 -07:00
site.py bpo-35872 and bpo-35873: Clears __PYVENV_LAUNCHER__ variable (GH-11745) 2019-02-03 23:19:38 -08:00
smtpd.py
smtplib.py bpo-35128: Fix spacing issues in warning.warn() messages. (GH-10268) 2018-11-01 12:33:35 +02:00
sndhdr.py bpo-31985: Deprecate openfp in aifc, sunau, and wave (#4344) 2017-11-10 11:38:25 -05:00
socket.py bpo-33138: Change standard error message for non-pickleable and non-copyable types. (GH-6239) 2018-10-31 02:28:07 +02:00
socketserver.py Fix typo in socketserver docstring (GH-11252) 2018-12-21 14:22:09 -08:00
sre_compile.py Simplify flags checks in sre_compile.py. (GH-9718) 2018-10-05 20:53:45 +03:00
sre_constants.py bpo-31690: Allow the inline flags "a", "L", and "u" to be used as group flags for RE. (#3885) 2017-10-24 23:31:42 +03:00
sre_parse.py bpo-34681: Rename class Pattern in sre_parse to State. (GH-9310) 2018-09-18 09:16:26 +03:00
ssl.py bpo-33023: Fix NotImplemented to NotImplementedError. (GH-10934) 2018-12-06 22:36:55 +02:00
stat.py closes bpo-34353: Add sockets to stat.filemode fallback python implementation. (GH-8703) 2018-08-09 22:12:08 -07:00
statistics.py bpo-36018: Add properties for mean and stdev (GH-12022) 2019-02-24 11:44:55 -08:00
string.py bpo-31672: Restore the former behavior when override flags in Template. (#5099) 2018-01-04 19:20:11 +02:00
stringprep.py
struct.py
subprocess.py subprocess: close pipes/fds by using ExitStack (GH-11686) 2019-01-29 13:14:24 -08:00
sunau.py bpo-32056: Improve exceptions in aifc, wave and sunau. (GH-5951) 2018-03-18 09:55:53 +02:00
symbol.py bpo-35766: Merge typed_ast back into CPython (GH-11645) 2019-01-31 12:40:27 +01:00
symtable.py bpo-34983: Expose symtable.Symbol.is_nonlocal() in the symtable module (GH-9872) 2018-10-20 01:46:00 +01:00
sysconfig.py bpo-35299: Fixed sysconfig and distutils during PGO profiling (GH-11744) 2019-02-04 17:15:13 -08:00
tabnanny.py bpo-30166: Import command-line parsing modules only when needed. (#1293) 2017-05-04 08:17:47 +03:00
tarfile.py bpo-34043: Optimize tarfile uncompress performance (GH-8089) 2018-07-06 14:06:00 +09:00
telnetlib.py bpo-30397: Add re.Pattern and re.Match. (#1646) 2017-10-04 20:09:49 +03:00
tempfile.py bpo-27300: Add the errors parameter to tempfile classes. (GH-6696) 2018-05-23 08:07:01 +03:00
textwrap.py bpo-30620: Remove dead lines from textwrap.dedent (GH-2064) 2017-06-15 19:19:43 -07:00
this.py
threading.py bpo-35283: Update the docstring of threading.Thread.join method (GH-11596) 2019-01-18 10:50:47 +01:00
timeit.py bpo-28240: timeit: Update repeat() doc (GH-7419) 2018-06-06 17:55:18 +02:00
token.py bpo-35766: Merge typed_ast back into CPython (GH-11645) 2019-01-31 12:40:27 +01:00
tokenize.py bpo-30455: Generate all token related code and docs from Grammar/Tokens. (GH-10370) 2018-12-22 11:18:40 +02:00
trace.py bpo-35202: Remove unused imports in Lib directory. (GH-10445) 2018-11-10 07:45:28 +02:00
traceback.py bpo-26502: Implement FrameSummary.__len__() (GH-8632) 2018-09-10 10:02:33 -07:00
tracemalloc.py bpo-32121: Add most_recent_first parameter to tracemalloc.Traceback.format (#4534) 2017-11-30 00:05:07 +01:00
tty.py
turtle.py bpo-35250: Correct argument name "num" -> "btn" in turtle docs. (GH-10565) 2018-11-16 15:28:51 +02:00
types.py bpo-35911: add cell constructor (GH-11771) 2019-02-07 19:36:48 +00:00
typing.py bpo-35341: Add generic version of OrderedDict to typing (GH-10850) 2018-12-02 15:53:14 +00:00
uu.py bpo-33687: Fix call to os.chmod() in uu.decode() (GH-7282) 2019-01-17 17:15:53 +03:00
uuid.py bpo-35701: Added __weakref__ slot to uuid.UUID (GH-11570) 2019-01-17 13:16:51 +01:00
warnings.py bpo-29564: warnings suggests to enable tracemalloc (GH-10486) 2018-11-13 02:41:00 +01:00
wave.py bpo-32056: Improve exceptions in aifc, wave and sunau. (GH-5951) 2018-03-18 09:55:53 +02:00
weakref.py bpo-35615: Fix crashes when copying a Weak{Key,Value}Dictionary. (GH-11384) 2019-02-07 19:51:59 +00:00
webbrowser.py bpo-35308: Fix regression where BROWSER env var is not respected. (GH-10693) 2018-11-26 23:29:45 +02:00
xdrlib.py
zipapp.py bpo-31638: Add compression support to zipapp (GH-3819) 2017-09-29 18:31:52 +01:00
zipfile.py bpo-32035: Fix words about strings and bytes in zipfile documentation. (GH-10592) 2018-11-25 09:51:14 +02:00
zipimport.py bpo-34726: Fix handling of hash-based pycs in zipimport. (GH-10327) 2018-11-07 20:34:59 +02:00