[issue33065] debugger issue concerning importing user created modules into another program

[Joshua De La Rosa]

New submission from Joshua De La Rosa :

Taking my first coding class, so I don't know much about coding or python in 
general, but I  ran into a problem when using the Debugger function for a 
homework assignment that neither I nor my professor could make sense of. My 
program executes successfully without running the Debugger or, in the case that 
I am running the Debugger, it only raises an error when I "Step" through the 
imported module that I implemented in another program, rather than just hitting 
"Go". The error it reports is:
AttributeError: '_ModuleLock' object has no attribute 'name'

Not sure which file to submit, since the I created my own module that is used 
in the program that raises the error when I step through it with the Debugger 
mode on.

--
assignee: terry.reedy
components: IDLE
messages: 313721
nosy: jcdlr, terry.reedy
priority: normal
severity: normal
status: open
title: debugger issue concerning importing user created modules into another 
program
type: compile error
versions: Python 3.6

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Re: Stock quote AP

[ROGER GRAYDON CHRISTMAN]

On Mon, Mar 12, 2018 12:00 PM, Irv Kalb wrote:
>
> On Mar 10, 2018, at 9:26 PM, Chris Angelico  wrote:
>> 
>> On Sun, Mar 11, 2018 at 4:18 PM, Irv Kalb  wrote:
>> Hi,
>> 
>> I teach courses on beginning Python (Python3).  In one of my
>topics, I explain how we can write simple programs that reach out to the
>internet and download data (request/response).
>> 
>> I show a number of examples using:   urllib.request.urlopen(
> )  to get things like weather data, currency
>exchange rates, etc.
>> 
>> I just tried my examples again, and they are all working fine, except for
>one.  I had an example where I used the call above to get simple
>(American) stock quotes from Yahoo.  However, with this example, now
>I get a bunch errors.  In tracking it down, I found that Yahoo has shut down
>this public API, discontinued this service.
>> 
>> So ... I am looking for a replacement.  I have done quite a bit of
>searching, but I have not been able to find a simple way to get a stock quote
>(no need for historical data - most recent price is fine).  I have
>found many examples where people have built custom packages for doing this type
>of thing.  However, I am in a college environment, and I cannot install any new
>packages on the computers there.  I've also seen examples of people building
>SQL-style queries to get this type of information, but that's beyond what I am
>trying to teach.
>> 
>> Wondering if anyone has any example of an API where I could just make a
>call using Python Standard Library interfaces to get stock quotes?
>> 
>> 
>> Check out https://www.alphavantage.co/ for something you can query for
>> free. Extensive and amazingly useful. One of my students did some
>> second-tier analysis on the data they provide as a capstone project on
>> stock trading analysis.
>> 
>> You may want to consider, though, modifying the "no new packages"
>> rule. The 'requests' library is WAY better for teaching Python and web
>> APIs than the raw urllib. Get just a small handful of pip-installable
>> packages whitelisted and your life will be better.
>> 
>> ChrisA
>> 
>
>Hi Chris,
>
>Thank you very much for this.  It is very close to what I am looking for.  I
>had seen this early in my searches but I didn't go into it in detail because it
>looked like it was designed to give way more information than I was looking for
>- for example, the first example is about time series data.  
>
>I did look into it today, and I got a free API key to check it out.  It does
>have the ability to give just a stock quote for a symbol, but it looks like the
>minimum I can get back is a csv:
>
>symbol,price,volume,timestamp
>MSFT,96.1800,--,2018-03-09 16:01:30
>
>which is easy enough for me to break apart.  I just wish there was a way to
>eliminate the header line so I wouldn't have to go through an explanation about
>that.  
>
>Thanks very much.  If I can't find another one that just give back a price,
>I'll probably use this one.
>
>Irv
>
>
>


Have you introduced the concepts of dictionaries in your Python course yet?
In my introductory course, I present dictionaries even before if statements and
for loops,
since they have so many very useful features for data manipulation.

That first line in the csv file is perfect for use with a dictionary.
You would just need to get a dictionary Reader from the csv module,

import urllib.request

import io, csv

file = urllib.request.urlopen(site + filename)

data = io.TextIOWrapper(file, newline="", encoding="utf-8")

reader = csv.DictReader(data)

for row in reader:


At this point, you could get your data from row['symbol'], row['price']
If you want to pretend that you don't actually know what the headings are,
you could simply enumerate that row dictionary value, at it will tell
you both the heading the value.   Each line in the file would be a new
dictionary.

Roger Christman
Pennsylvania State University



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[issue33064] lib2to3 fails on a trailing comma after **kwargs in a function signature

[Łukasz Langa]

Change by Łukasz Langa :


--
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pull_requests: +5858, 5859

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[issue33064] lib2to3 fails on a trailing comma after **kwargs in a function signature

[Łukasz Langa]

Change by Łukasz Langa :


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[issue33063] failed to build _ctypes: undefined reference to `ffi_closure_FASTCALL'

[Siming Yuan]

Siming Yuan  added the comment:

tested again with Python 3.4.8 and the bug is observed. patch & builds fine.

strangely, tested building python 3.6.4 on the same environment without patch, 
no issues, even though the ffi.c code is exactly the same.

--
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versions: +Python 3.4

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[issue33064] lib2to3 fails on a trailing comma after **kwargs in a function signature

[Łukasz Langa]

Łukasz Langa  added the comment:

Ned, I'd like this to make into 3.6.5 if at all possible.

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type:  -> behavior

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[issue33064] lib2to3 fails on a trailing comma after **kwargs in a function signature

[Łukasz Langa]

New submission from Łukasz Langa :

Title says all. I have a patch.

--
assignee: lukasz.langa
messages: 313718
nosy: lukasz.langa
priority: normal
severity: normal
status: open
title: lib2to3 fails on a trailing comma after **kwargs in a function signature
versions: Python 3.6, Python 3.7, Python 3.8

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[issue33063] failed to build _ctypes: undefined reference to `ffi_closure_FASTCALL'

[Siming Yuan]

Siming Yuan  added the comment:

attached patch that fixes the build issue.

credit to davin @ https://bugs.python.org/issue23042

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Added file: https://bugs.python.org/file47479/ffi.patch

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[issue33063] failed to build _ctypes: undefined reference to `ffi_closure_FASTCALL'

[Siming Yuan]

New submission from Siming Yuan :

compiling Python 3.5.5 under RHEL 6.4, 32-bit:

build/temp.linux-x86_64-3.5/opt/python/Python-3.5.5/Modules/_ctypes/libffi/src/x86/ffi.o:
 In function `ffi_prep_closure_loc':
/opt/python/Python-3.5.5/Modules/_ctypes/libffi/src/x86/ffi.c:678: undefined 
reference to `ffi_closure_FASTCALL'
/usr/bin/ld: 
build/temp.linux-x86_64-3.5/opt/python/Python-3.5.5/Modules/_ctypes/libffi/src/x86/ffi.o:
 relocation R_386_GOTOFF against undefined hidden symbol `ffi_closure_FASTCALL' 
can not be used when making a shared object
/usr/bin/ld: final link failed: Bad value


related to https://bugs.python.org/issue23042 - but it seems like the patch for 
x86/ffi.c never made it to release.

--
components: Build
messages: 313716
nosy: siming85
priority: normal
severity: normal
status: open
title: failed to build _ctypes: undefined reference to `ffi_closure_FASTCALL'
versions: Python 3.5

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[issue33038] GzipFile doesn't always ignore None as filename

[bbayles]

Change by bbayles :


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stage:  -> patch review

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[issue29719] "Date" of what's new is confusing

[Ned Deily]

Ned Deily  added the comment:

> I believe this can be closed as 'fixed'?

Well, it *was* fixed!  But then I reintroduced the boilerplate when I created 
the 3.7 and 3.8 whatsnew files - now fixed.  Thanks for the reminder!

--
assignee:  -> docs@python
components: +Documentation
nosy: +docs@python
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.6, Python 3.7, Python 3.8

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[issue29719] "Date" of what's new is confusing

[Ned Deily]

Ned Deily  added the comment:


New changeset d461ed84b57aae0bdccd117dc38109c087444d50 by Ned Deily in branch 
'3.7':
bpo-29719: Remove Date and Release field in whatsnew/3.7 (GH-6094)
https://github.com/python/cpython/commit/d461ed84b57aae0bdccd117dc38109c087444d50


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[issue29719] "Date" of what's new is confusing

[Ned Deily]

Ned Deily  added the comment:


New changeset a34510a4c562b4b23c7f9da6ff6e2318484f5f1a by Ned Deily in branch 
'master':
bpo-29719: Remove Date and Release field in whatsnew/3.7 and 8 (GH-6093)
https://github.com/python/cpython/commit/a34510a4c562b4b23c7f9da6ff6e2318484f5f1a


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[issue29719] "Date" of what's new is confusing

[Ned Deily]

Change by Ned Deily :


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[issue29719] "Date" of what's new is confusing

[Ned Deily]

Change by Ned Deily :


--
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pull_requests: +5855
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Re: Enumerating all 3-tuples (Posting On Python-List Prohibited)

[Ben Bacarisse]

Lawrence D’Oliveiro  writes:

> On Sunday, March 11, 2018 at 2:40:16 PM UTC+13, Ben Bacarisse wrote:
>> It would be nice to avoid relying on any value-based ordering.
>
> I don’t see why. The set of elements has to have the same cardinality
> as the set of natural numbers, after all. Why not take advantage of
> that?

Maybe we are saying the same thing?  The elements from which the tuple
members are drawn need only be a sequence defined by a successor
function.  The values themselves need have no ordering nor, indeed, have
any of the arithmetic properties of N.

Of course you can always generate n-tuples of N and then map these to
n-tuples of the intended sequence but that seems inelegant.

-- 
Ben.
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[issue33014] Clarify str.isidentifier docstring; fix keyword.iskeyword docstring

[Terry J. Reedy]

Terry J. Reedy  added the comment:

Separate PRs for doc and code changes will be needed anyway if the code change 
is restricted to 3.8.

To me, changing keyword.iskeyword.__doc__ from the irrelevant Python tautology 
'x.__contains__(y) <==> y in x.' to something that says what the function does, 
as docstrings should,  is a bug fix, not an enhancement.  Hence a slight 
slowdown is not a concern to me.  I see 4 possible types of fixes.

1. Write a python function with docstring.  3.8 only as it changes 
type(iskeyword).

def iskeyword(s):
"Return true if s is a Python keyword."
return s in kwlist

2. Change the aberrant set/frozenset.__contains__.__doc__ so it makes some 
sense as a docstring for a bound method (as with list and dict).  
  list/tuple.__contains__.__doc__ is 'Return key in self.'
  dict.__contains__.__doc__ is 'True if the dictionary has the specified key, 
else False.'

I would copy the dict __contains__ docstring, with 'Return' prefixed, to set 
and frozenset, with the obvious substitution.  I don't know about backporting 
this.

3. Make bound_method docstrings writable, like with Python function docstrings 
(3.8 only).  Then we could use Cheryl's suggestion.  Or add a function 
bounddoc(bound_method, docstring) that can change a bound_method's docsting.

CPython uses 2 types for built-in methods bound to an instance.  The choice is 
not consistent within a class or across classes for a particular method.
  builtin_function_or_method ([].append, frozenset().__contains__)
  method-wrapper ([].__contains__)
Python classes result in 'bound method'.  All 3 copy the docstring of the 
instance method.  (For Python classes, one can temporarily change the method 
docstring before creating a new bound method.)

4. Add makebound(method, instance, docstring) that creates a bound method (of 
the appropriate type) but with the passed docstring (3.8 only)

3 or 4 would allow any public bound method to have a custom docstring.

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[issue20917] Idle: Enhance font change notification system

[Cheryl Sabella]

Change by Cheryl Sabella :


--
dependencies: +IDLE: Add docstrings and tests for codecontext
versions: +Python 3.8 -Python 3.6

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Re: test

[Yuan Xue]

Alister  writes:

> On Mon, 12 Mar 2018 13:43:01 -0500, Yuan Xue wrote:
>
>> test
>
> failed

Funny, I am wodering what type of persons are still using this clumsy
system, and their purposes of using it.
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[issue29719] "Date" of what's new is confusing

[Cheryl Sabella]

Cheryl Sabella  added the comment:

I believe this can be closed as 'fixed'?

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test

[Yuan Xue]

test
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[issue24518] json.dumps should accept key function for ``sort_keys``

[Cheryl Sabella]

Cheryl Sabella  added the comment:

As there was interest in this patch, @catherinedevlin would you be able to make 
a Github pull request for it?

Thanks!

--
nosy: +csabella
stage:  -> needs patch
versions: +Python 3.8 -Python 3.6

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[issue32085] [Security] A New Era of SSRF - Exploiting URL Parser in Trending Programming Languages!

[Cheryl Sabella]

Cheryl Sabella  added the comment:

Since issue 32185 has been patched, should this one be revisited to see if that 
solution helped fixed this one?

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Re: test

[Cameron Simpson]

On 17Mar2014 11:42, Mark H Harris  wrote:

On 3/16/14 5:07 AM, Chris “Kwpolska” Warrick wrote:

Why not use the mailing list instead?  It’s a much easier way to
access this place.


I prefer to 'pull' rather than receive the 'push'.

The newsreader idea is better because threading works better, and
because the interface is simpler. I don't know, just preference
I guess.


I use mutt for email. Great threading support. My usenetness has mostly lapsed, 
but I used to funnel groups into my mail filer, read with mutt (same tool for 
news and mail!), and have a script for sendmail which intercepted 
group.name@usenet and send that via NNTP (obviously my puller inserted those 
addresses in the pull).



What are most active pythoniacs doing with this these days?


I use the mailing lists and mutt for reading.

Cheers,
Cameron Simpson  (formerly c...@zip.com.au)
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[issue21018] [patch] added missing documentation about escaping characters for configparser

[Cheryl Sabella]

Cheryl Sabella  added the comment:

@Arun.Persaud, would you be interested in converting your patch to a Github 
pull request?

--
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versions: +Python 3.7, Python 3.8 -Python 3.5

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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

As for StackOverflow links provided by Robert, it looks to me that 
float.is_integer() is always used improperly.

If keep this method it would be worth to warn against improper use of it.

Bad:

(x/5).is_integer()

Good:

x % 5 == 0

or

not x % 5

Bad:

math.sqrt(x).is_integer()

Good:

int(math.sqrt(x))**2 == x

Bad:

while x < y:
if x.is_integer():
print(x)
x += 0.1

Good (if initial x was integer):

x0 = x
i = 0
while x < y:
x = x0 + i/10
if not i % 10:
print(x)
i += 1

And provide an example of a *proper* use case (if it exists).

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[issue33062] ssl_renegotiate() doesn't seem to be exposed

[Vitaly Kruglikov]

New submission from Vitaly Kruglikov :

I need to write a test for my client to make sure it's non-blocking ssl 
interactions are able to survive SSL renegotiation. However, I can't seem to 
find anything in our python ssl API that calls `SSL_renegotiate()` in order to 
force renegotiation.

--
assignee: christian.heimes
components: SSL
messages: 313706
nosy: christian.heimes, vitaly.krug
priority: normal
severity: normal
status: open
title: ssl_renegotiate() doesn't seem to be exposed
type: behavior
versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8

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[issue33061] NoReturn missing from __all__ in typing.py

[Allen Tracht]

Change by Allen Tracht :


--
components: Library (Lib)
nosy: Allen Tracht
priority: normal
severity: normal
status: open
title: NoReturn missing from __all__ in typing.py
type: behavior
versions: Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8

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[issue33056] LEaking files in concurrent.futures.process

[miss-islington]

Change by miss-islington :


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[issue33058] Enhance Python's Memory Instrumentation with COUNT_ALLOCS

[Eddie Elizondo]

Change by Eddie Elizondo :


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pull_requests: +5852
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[issue33060] Installation hangs at "Publishing product information"

[Carol Willing]

Carol Willing  added the comment:

Hi Bob,

Your best option to get timely help information about installation is to visit 
one of the support channels for Python:

- python-help mailing list https://www.python.org/community/lists/
- #python IRC channel https://www.python.org/community/irc/

First, make sure that your system is a 64 bit system. The installer that you 
reference will not work if you are using a 32 bit system.

Double check that you have all Windows updates installed. 

Try the help channels mentioned above or try to install `Windows x86 MSI 
installer` found at https://www.python.org/downloads/release/python-2714/

You can also try a third party distribution such as Anaconda.

--
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resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

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[issue33023] Unable to copy ssl.SSLContext

[Antoine Pitrou]

Antoine Pitrou  added the comment:

You won't have any session resumption tickets until a connection succeeds.  And 
even then, I don't think it would be a problem.  By design, SSL contexts are 
meant to be re-used accross multiple connections.

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[issue33023] Unable to copy ssl.SSLContext

[Vitaly Kruglikov]

Vitaly Kruglikov  added the comment:

> What would those side-effects be?

Christian Heimes suggested that 
> A context contains elements that can't be cloned easily, e.g. session 
> resumption tickets.

My concern then would be potential side-effects from such session resumption 
tickets and anything else that one connection attempt might save/change within 
an SSL Context that might have an undesirable side-effect on the follow-on 
connection attempts.

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[issue33060] Installation hangs at "Publishing product information"

[Bob Klahn]

New submission from Bob Klahn :

I am unable to install Python 2.7.14 on my Windows 7 PC.  Using 
python-2.7.14.amd64.msi .  The installation hangs at the "Publishing product 
information" step.

Subsequent installation attempts result in the message "Python 2.7.14 (64-bit) 
setup was interrupted.  Your system has not been modified.  To install this 
program at a later time, please run the installation again.  Click the Finish 
button to exit the Installer."

I need to be able to make this work! With this version of Windows and this 
version of Python.

Help!

--
components: Installation
messages: 313702
nosy: bobstones
priority: normal
severity: normal
status: open
title: Installation hangs at "Publishing product information"
versions: Python 2.7

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[issue33059] netrc module validates file mode only for /home/user/.netrc

[Andreas Költringer]

New submission from Andreas Költringer :

On my first try to use the netrc module I got back the error: 

"~/.netrc access too permissive: access permissions must restrict access to 
only the owner"

I changed the file permissions and wrapped this up in try-except and went on to 
write some unit tests (using tempfile), assuming that the file mode checks 
would be performed on any netrc file I passed into the constructor (yes, I did 
not read the documentation sufficiently well).

Anyway, I believe that these security checks should be done for any netrc file 
(they contain sensitive information no matter where they are located on the 
file system). There was already a discussion on the topic

https://bugs.python.org/issue14984

where there was concern regarding backwards-compatibility and the idea to 
re-visit this issue "in the future". That was in 2013, so maybe this "future" 
is now?

--
components: Library (Lib)
messages: 313701
nosy: akoeltringer
priority: normal
severity: normal
status: open
title: netrc module validates file mode only for /home/user/.netrc
type: security
versions: Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8

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[issue32972] unittest.TestCase coroutine support

[Yury Selivanov]

Yury Selivanov  added the comment:

> - I would say event loop per class.  If someone really needs event loop per 
> method, they can create separate classes per method.  It's ugly, but 
> effective.

+1.

- We should have an async setUp capability.  Maybe we could add a helper method 
to be called from setUp rather than adding a whole new asyncSetUp into the 
protocol?  That eliminates the problem of which goes first.

I'd rather have a protocol :)  Protocols are easy to document and it's possible 
to statically validate them (with linters/metaclasses).  Calling some method 
from setUp to call asyncSetUp would be a common gotcha IMO.

We can always call synchronous setUp before asyncSetUp, I think it's intuitive 
enough.

Speaking of addCallback, we should have a distinct addAsyncCallback.  It's OK 
to have an object with both __call__ and __await__ methods -- in which case 
it's not clear which one you should call.

In general, while we will be adding a new subclass and a few 'async'-prefixed 
methods, it should still be relatively straightforward for people to write and, 
more importantly, read the code that uses them.

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[issue32972] unittest.TestCase coroutine support

[Zachary Ware]

Zachary Ware  added the comment:

Ok, Yury clarified a few points before I got my message submitted there, so 
some of my last message may be a bit misguided.  In particular, the problems 
with just using `asyncio.run` are clearer to me now.

To give my answers to Yury's open questions:

- We should have an async setUpClass capability, one way or another.

- I would say event loop per class.  If someone really needs event loop per 
method, they can create separate classes per method.  It's ugly, but effective.

- We should have an async setUp capability.  Maybe we could add a helper method 
to be called from setUp rather than adding a whole new asyncSetUp into the 
protocol?  That eliminates the problem of which goes first.

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[issue32911] Doc strings no longer stored in body of AST

[Łukasz Langa]

Łukasz Langa  added the comment:

Python's AST already doesn't include a lot of syntax that has no runtime effect:
- comments;
- whitespace and punctuation.

The situation is now made "worse" with constant folding.  You won't have full 
line information on the full expression, you don't even fully *see* expressions 
as syntactically provided by user code.  The docstring is just a special case 
of that.

As a counter example, it still includes function-level type annotations which 
are not evaluated. Clearly we don't have an explicit rule about this.

If you asked *me*, I would say Python provides a "lossy" AST and this is the 
one it itself uses.  It also provides a "lossless" AST and this one is in 
lib2to3.  It's unfortunate that the latter is not documented and kind of 
neglected.  This is something I want to address soonish.

Summing up, I'm in favor of option 3.  The AST preserves the docstring, it 
simply doesn't have information on where exactly it lives.  In exchange, the 
tree makes it easier to *find* the docstring and easier to find the first 
instruction (as Serhiy points out, the first statement is now always code to be 
executed).

Quoting literally the second sentence of the `ast` documentation:
> The abstract syntax itself might change with each Python release.

I am not against Option 2 since it's already implemented but I feel it's a 
pretty big change, pretty late in the release process for 3.7.  The amount of 
work required *just* to preserve the line number of the docstring (which can be 
reasonably guessed anyway) seems silly to me.

--
nosy: +lukasz.langa

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[issue33014] Clarify str.isidentifier docstring; fix keyword.iskeyword docstring

[Cheryl Sabella]

Cheryl Sabella  added the comment:

Too bad we couldn't do:

iskeyword = frozenset(kwlist).__contains__
iskeyword.__doc__ = 'Test whether a string is a reserved identifier.'

But I'm sure there are reasons for this:
AttributeError: attribute '__doc__' of 'builtin_function_or_method' objects is 
not writable

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[issue32972] unittest.TestCase coroutine support

[Zachary Ware]

Zachary Ware  added the comment:

1. I'm still -1 on a separate subclass, especially since the subclass should 
still be compatible with the base class.

2. This is only in consideration for 3.8 (even 3.7 is past feature freeze at 
this point), so the version-dependent behavior is unnecessary.

3. I agree that the `super().setUp()` idiom precludes allowing `setUp` and 
`tearDown` to be synchronous or asynchronous unless the idiom becomes 
`self.runMethod(super().setUp)`, but that's longer and harder to remember.  
`setUpClass` and `tearDownClass` also need to be considered.

You also still need to add tests.

`addCleanup` is an open question; I think it could handle sync or async on its 
own but could be convinced otherwise.


Andrew: Judging by your questions in msg313481 I think my description of 
`coroutine_runner` was not specific enough.  The basic idea is that 
unittest.case.TestCase is defined with `coroutine_runner = asyncio.run`, and if 
you need something else then you do:

class MyTest(TestCase):

# I assume trio has something like this :)
coroutine_runner = trio.run

async def test_something_in_trio(self):
self.assertTrue(1)


asyncio gets the special treatment of having its runner set by default by 
virtue of being in the standard library.

I'm certainly open to better naming :)

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[issue32972] unittest.TestCase coroutine support

[Yury Selivanov]

Yury Selivanov  added the comment:

First, John and Peter, let's not have two competing PRs.  I'd prefer to have 
only one to make things easier to review.  So far it looks like Peter's is 
slightly more developed.  And this also seems to be a complex issue, so there's 
plenty of work to be done here and you can work on it jointly if you want.

I think a lot of Andrew's recommendations (see [1]) about doSetUp etc make 
sense.

The problem is how to marry methods like `asyncSetUpClass`, `asyncSetUp` and 
`runTest` together: all are async, all should be executed *within* one event 
loop.  They should also be executed *before* you call the actual test method, 
so it's *incorrect* to call the test case and decide if async set ups should be 
called or not.  This is another argument to have a separate AsyncioTestCase 
base class.

BTW, we can use asyncio.run() to execute only *one* coroutine.  If you have 
more than one, they will be executed in *different* event loops!  This is why 
the "coroutine runner" proposal is fundamentally incompatible with having 
`asyncSetUp` methods.

Speaking of asyncSetUp, let me re-iterate why we can't *just* reuse setUp:

  class B:

async def setUp(self):
print('bar')

  class A(B):

def setUp(self):
super().setUp()
print('foo')

If we execute tests in A, 'bar' will never be printed.

So I'm suggesting to try another approach: have a generic ABC 
`unittets.AsyncTestCase(ABC)` with one abstract method: `makeAsyncExecutor`.  
This will be a class intended to be used by framework developers.

We then add a concrete `unittest.AsyncioTestCase(unittest.AsyncTestCase)` 
implementation class to unittest (or should it be asyncio? I'm fine either way).

So what will `makeAsyncExecutor` do?  It should return an instance of 
`unittest.AsyncExecutor(ABC)` object which roughly would look like the 
following (this is just an example design, we need to discuss it further):

  class AsyncExecutor(abc.ABC):

  def init(self)

  def runAsync(self, coro: typing.Coroutine)

  def shutdown(self)

Why do we need a proxy object?  Well, due to some historical reasons, 
`asyncio.loop.close()` just closes the loop.  The actual correct shutdown 
protocol for an asyncio program is a little bit more elaborate, you can take a 
look at how asyncio.run is implemented in Python 3.7: [2].  Correct 
initialization of an event loop might also require extra work.  And keep in 
mind, we want to have a more-or-less generic and reusable implementation here 
so that frameworks like Trio could use this new API too (that's not the main 
goal, but would be nice to have).

A few open questions: 

- Should we have 'asyncSetUpClass'?

- Should we have an event loop per one test case method, or per one class?  
Should this be configurable?  In my experience both things are needed from time 
to time.

- If we have 'asyncSetUp' should it be called before or after 'setUp'?


[1] https://github.com/python/cpython/pull/6051
[2] https://github.com/python/cpython/blob/master/Lib/asyncio/runners.py#L8

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[issue33014] Clarify str.isidentifier docstring; fix keyword.iskeyword docstring

[Carol Willing]

Carol Willing  added the comment:

I've made an additional suggestion on the open PR to add an example to the 
`.rst` doc that better clarifies the differences and usage of `iskeyword` and 
`isidentifier`.

Perhaps making that addition and skipping the updates to the C source code 
would be a reasonable step forward. While perhaps not ideal, it seems a 
reasonable compromise to provide more helpful documentation without any 
potential performance impact or regression.

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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Robert Smallshire]

Robert Smallshire  added the comment:

Thank you Raymond. I'll work up a PR shortly.

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[issue32972] unittest.TestCase coroutine support

[Petter S]

Petter S  added the comment:

Personally, I think John's PR is fine. (but the test class could arguably live 
in asyncio) I like that setUp, tearDown and test methods all can be async.

But if setUp and tearDown should never be async as Yury commented above, they 
don't need runners. That is what I went for in my PR.

Introducing three new public methods to TestCase is too much. I originally made 
the runner private, but Yury told me to make it public and document it.

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[issue33058] Enhance Python's Memory Instrumentation with COUNT_ALLOCS

[Eddie Elizondo]

Eddie Elizondo  added the comment:

@serhiy.storchaka tracemalloc can't distinguish between the usage of gc allocs, 
normal mallocs, and free list reuse.

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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

I would rather deprecate float.is_integer() if it looks as a magnet of bad code.

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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Raymond Hettinger]

Raymond Hettinger  added the comment:

Robert, would you please update you patch and submit it to Github as a pull 
request.  It is looking like this will likely go forward after all.

--
stage: patch review -> needs patch

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[issue33014] Clarify str.isidentifier docstring; fix keyword.iskeyword docstring

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

For changing a docstring we have to change the implementation of iskeyword(). 
It seems to me that the current implementation is the fastest, and any other 
implementation will be a tiny bit slower.

I just wanted to say that this enhancement has a non-zero cost.

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[issue32972] unittest.TestCase coroutine support

[Petter S]

Petter S  added the comment:

John: inspect.iscoroutinefunction(meth) does not work if the method is 
decorated with e.g. unittest.mock.patch.

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[issue33058] Enhance Python's Memory Instrumentation with COUNT_ALLOCS

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Could tracemalloc help you?

--
nosy: +serhiy.storchaka, vstinner

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Re: Can mock.mock_open.read return different values?

[codewizard]

On Monday, March 12, 2018 at 4:51:53 AM UTC-4, Tim Golden wrote:
> I'm contributing to a codebase which makes heavy use of mock in the test 
> suite, a technique which I'm aware of but have used only rarely. In one 
> situation it uses mock.mock_open(read_data="...") and then asserts again 
> mock_open.return_value.read.call_count.
> 
> A code change I've made results in an increase in the call count but 
> also the open() I've introduced opens the file in binary mode and does 
> something with the resulting data.
> 
> Hugely simplified, the new code and unchanged test looks like this:
> 
> import os, sys
> import unittest
> from unittest import mock
> 
> def read_file(filename):
> 
>  #
>  # This section is new
>  #
>  with open(filename, "rb") as f:
>  text = f.read()
>  if text.startswith(b"#"):
>  pass
> 
>  with open(filename) as f:
>  text = f.read()
>  if text.startswith("#"):
>  pass
> 
>  return text
> 
> class TestS(unittest.TestCase):
> 
>  def test_read_file(self):
>  mock_open = mock.mock_open(read_data="abc")
>  with mock.patch('builtins.open', mock_open):
>  data = read_file("abc")
>  assert mock_open.return_value.read.call_count == 1
> 
> if __name__ == '__main__':
>  unittest.main()
> 
> 
> I would expect the test to fail because of the call_count change. But in 
> fact it errors out because the newly-added "if test.startswith()" 
> receives a string, not bytes, from the Mock's read_data functionality.
> 
> Ignore for the moment any question of changing the read_file 
> implementation to assist testing. And leave aside the question of 
> whether a mock_open is really a good test approach here.
> 
> Is there any way in which I can have the mock_open object return bytes 
> for the first open and a string for the second? I've looked at setting a 
> side_effect function against the mock_open.return_value.read Mock, but I 
> can't see a way of having the function know whether it's supposed to be 
> returning bytes or string.
> 
> 
> TJG

2 ways come to mind:

1. Have the side effect function check something that differentiates
those 2 calls. In this case, checking mode argument value should work.

2. Rely on the order of calls with a local side effect function
closing over a call number. Something like this (untested):

def test_read_file(self):
call_number = 0

def open_side_effect(filename, mode='r'):
call_number += 1

if call_number == 1:
 return b'some bytes'
if call_number == 2:
 return 'some string'

 with mock.patch(..., side_effect=open_side_effect):
  # test

Regards,
Igor.
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[issue33058] Enhance Python's Memory Instrumentation with COUNT_ALLOCS

[Eddie Elizondo]

Eddie Elizondo  added the comment:

Currently, Python has very few instrumentation when it comes to the types of 
allocations that it's doing. For instance, we currently can't identify how many 
times an object uses free lists vs actual mallocs.

Currently, there's a special build which can be used by compiling with 
"-DCOUNT_ALLOCS". However, this build is not ABI compatible with extensions. 
Meaning you have to recompile all the modules that are used. Doing this on a 
large scale scenario (1000+ modules) is not feasible.

Thus, I propose the following enhancements:
* Make COUNT_ALLOCS ABI compatible

Then:
* Expand the counters to not only track allocs and frees but also distinguish 
between:
* GC Counts: Allocs/Frees coming from PyObject_GC_Malloc PyObject_GC_Del
* Memory Counts: Allocs/Frees coming from PyMem_Malloc/PyObject_Malloc 
PyObject_Free (modulo GC objects).
* Free Lists: "Allocs/Frees" coming from specific object's free_lists/caches.
* Misc: Extra kinds of "Allocs/Frees" such as code's zombie frame.

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[issue33058] Enhance Python's Memory Instrumentation with COUNT_ALLOCS

[Eddie Elizondo]

New submission from Eddie Elizondo :

[WIP]

--
title: [WIP] Enhance Python's Memory Instrumentation with COUNT_ALLCOS -> 
Enhance Python's Memory Instrumentation with COUNT_ALLOCS

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[issue33058] Enhancing Python

[Eddie Elizondo]

Change by Eddie Elizondo :


--
nosy: elizondo93
priority: normal
severity: normal
status: open
title: Enhancing Python
type: enhancement
versions: Python 3.8

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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Stefan Krah]

Stefan Krah  added the comment:

I agree with Mark's mailing list statements: There is no ambiguity
for decimal, given that the existing predicates ignore the context.

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[issue33058] [WIP] Enhance Python's Memory Instrumentation with COUNT_ALLCOS

[Eddie Elizondo]

Change by Eddie Elizondo :


--
title: [WIP] Enhancing Python's COUNT_ALLOCS -> [WIP] Enhance Python's Memory 
Instrumentation with COUNT_ALLCOS

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Re: test

[Alister via Python-list]

On Mon, 12 Mar 2018 13:43:01 -0500, Yuan Xue wrote:

> test

failed



-- 
Mollison's Bureaucracy Hypothesis:
If an idea can survive a bureaucratic review and be implemented
it wasn't worth doing.
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[issue33058] [WIP] Enhancing Python's COUNT_ALLOCS

[Eddie Elizondo]

Change by Eddie Elizondo :


--
title: Enhancing Python -> [WIP] Enhancing Python's COUNT_ALLOCS

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[issue33014] Clarify str.isidentifier docstring; fix keyword.iskeyword docstring

[Terry J. Reedy]

Terry J. Reedy  added the comment:

As I posted above, keywork.iskeyword already has a bizarrely incorrect 
docstring, so how can there be a performance impact? And why single out such a 
rarely used function?

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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

What is the use case of float.is_integer() at all? I haven't found its usages 
in large projects on GitHub. Only in playing examples where it is (mis)used in 
cases like (x/5).is_integer() (x % 5 == 0 is better) or (x**0.5).is_integer() 
(wrong for some floats or large integers).

Maybe it should be removed in Python 3.0.

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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Mark Dickinson]

Mark Dickinson  added the comment:

Ongoing discussion here: 
https://mail.python.org/pipermail/python-dev/2018-March/152358.html

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[issue22674] RFE: Add signal.strsignal(): string describing a signal

[Antoine Pitrou]

Antoine Pitrou  added the comment:


New changeset 019f5b3e9e4c2a1297580483c3d5a5a10bddb93b by Antoine Pitrou 
(Antoine Pietri) in branch 'master':
bpo-22674: fix test_strsignal on OSX (GH-6085)
https://github.com/python/cpython/commit/019f5b3e9e4c2a1297580483c3d5a5a10bddb93b


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[issue22674] RFE: Add signal.strsignal(): string describing a signal

[Antoine Pitrou]

Change by Antoine Pitrou :


--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue33057] logging.Manager.logRecordFactory is never used

[Ben Feinstein]

Change by Ben Feinstein :


Removed file: https://bugs.python.org/file47478/issue_logRecordFactory.py

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[issue33048] macOS job broken on Travis CI

[Ned Deily]

Ned Deily  added the comment:

Thanks, Carol!

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Re: Enumerating all 3-tuples

[Chris Angelico]

On Tue, Mar 13, 2018 at 5:42 AM, Skip Montanaro
 wrote:
 4 (0, 0, 1)
 9 (0, 0, 1)
 18 (0, 0, 2)
 32 (0, 0, 2)
>>
>> I spy duplicates.
>
> I didn't realize we'd started playing "I Spy."
> 

We're actually playing Calvinball, but don't tell the others.

ChrisA
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Re: Enumerating all 3-tuples

[Skip Montanaro]

>>> 4 (0, 0, 1)
>>> 9 (0, 0, 1)
>>> 18 (0, 0, 2)
>>> 32 (0, 0, 2)
>
> I spy duplicates.

I didn't realize we'd started playing "I Spy

."
​ ​

Skip
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[issue22102] Zipfile generates Zipfile error in zip with 0 total number of disk in Zip64 end of central directory locator

[Guillaume Carre]

Guillaume Carre  added the comment:

Yes these were pretty large zip 30 to 60Gb with thousands of small files in
them I've fixed locally on our servers and we've been happy even after
accepting similar sized files from linux machine.
I'm also quite surprised about this not being reported by others.

On Mon, Mar 12, 2018 at 9:01 AM, Thomas Kluyver 
wrote:

>
> Thomas Kluyver  added the comment:
>
> If every Windows 7 computer is generating zipfiles which are invalid in
> this way, that would be a pretty strong argument for Python (and other
> tools) to accept it. But if that was the case, I would also expect that
> there would be many more issues about it.
>
> Are the files you're compressing large (multi-GB)? Python only uses the
> zip64 format when the files are too big for the older zip format; maybe
> Windows is doing the same. Even in that case, I'm still surprised that more
> people don't hit it.
>
> --
>
> ___
> Python tracker 
> 
> ___
>

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Re: Initializing error

[Chris Angelico]

On Tue, Mar 13, 2018 at 2:53 AM, Michael F. Stemper
 wrote:
> On 2018-03-10 09:41, Harsh Bhardwaj wrote:
>>
>> On Mar 5, 2018 11:16 AM, "Harsh Bhardwaj"  wrote:
>>
>> Plz fix this problem for me. I tried every way to fix this.
>> Windows 7(32-bit)
>
>
> That's a pretty bad problem. Fortunately, there is a fix:
> 
>

And if that fix isn't appropriate to you, Bhardwaj, please notice that
the quoted text above is everything that we got. You cannot attach
images to your posts, and we cannot read your mind (not legally,
anyway). You'll have to ask your question with enough information for
us to answer it.

ChrisA
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Re: Enumerating all 3-tuples

[Chris Angelico]

On Tue, Mar 13, 2018 at 2:54 AM, Robin Becker  wrote:
> On 12/03/2018 13:17, Robin Becker wrote:
> An alternative approach gives more orderly sequences using a variable base
> number construction
>
>> 4 (0, 0, 1)
>> 9 (0, 0, 1)
>> 18 (0, 0, 2)
>> 32 (0, 0, 2)

I spy duplicates.

ChrisA
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[issue30528] ipaddress.IPv{4,6}Network.reverse_pointer is broken

[Ewoud Kohl van Wijngaarden]

Ewoud Kohl van Wijngaarden  added the 
comment:

It's interesting to note that neither IPv4Network[1] nor IPv4Network docs 
mention reverse_pointer. That means it could also remove them (which 
essentially also throws an exception) since they don't make sense for networks. 
It would be useful to have the described functionality under a better name.

[1]: https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv4Network
[2]: https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv6Network

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[issue33014] Clarify str.isidentifier docstring; fix keyword.iskeyword docstring

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

The change that will add a docstring to keyword.iskeyword() inevitable will 
have a negative performance effect. Is it worth it?

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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Raymond Hettinger]

Change by Raymond Hettinger :


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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

float.is_integer() was added 6f34109384f3a78d5f4f8bdd418a89caca19631e 
(unfortunately no issue number for looking at the discussion preceded it). I 
don't know reasons. The same changeset added implementations of 
complex.is_finite(), int.is_finite(), long.is_finite(), float.is_inf() and 
float.is_nan(), but they were disabled by default (they are still a dead code 
in sources). The same changeset added well known functions math.isinf(), 
math.isnan(), cmath.isinf() and cmath.isnan().

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[issue33014] Clarify str.isidentifier docstring; fix keyword.iskeyword docstring

[Sanyam Khurana]

Sanyam Khurana  added the comment:

Carol, Yes, I've raised a PR.

Currently, I've updated the docs for `str.isidentifier` clarifying the usage of 
`keyword.iskeyword`

For updating the docstring of `keyword.iskeyword`, I saw that `Lib/Keyword.py` 
defines this on line 55: `iskeyword = frozenset(kwlist).__contains__`

The docstring of the file says that it is automatically generated from 
`graminit.c`. I observed that file and have no clue on how to proceed to have 
the doc string updated. Can someone provide me a pointer on this please?

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[issue33048] macOS job broken on Travis CI

[Carol Willing]

Carol Willing  added the comment:

I've opened a WIP PR to fix the Travis test config on macOS. Antoine is correct 
that the recent brew changes related to Python caused the test failure.

I will try to get working on Python3 first and then Python2.

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[issue33014] Clarify str.isidentifier docstring; fix keyword.iskeyword docstring

[Sanyam Khurana]

Change by Sanyam Khurana :


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[issue3014] file_dealloc() assumes errno is set when EOF is returned

[Sanyam Khurana]

Change by Sanyam Khurana :


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[issue33057] logging.Manager.logRecordFactory is never used

[Ben Feinstein]

Change by Ben Feinstein :


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[issue22674] RFE: Add signal.strsignal(): string describing a signal

[Ned Deily]

Ned Deily  added the comment:

> Ned, this is why I'd like issue33048 to be solved :-) Having to rely on the 
> buildbot fleet for bugfix iteration is not convenient at all.

I want to see it solved, too. :-)  But there are other core-devs out there who 
are in a better position to solve it at the moment; it's not particularly a 
macOS problem; it's a problem with using Homebrew and Travis, neither one of 
which I'm all that familiar with and which others have set up.  And I'm in the 
middle of trying to get some releases and other stuff out the door.  So, I'm 
not going to be able to spend time on it right now.  Sorry!

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[issue33048] macOS job broken on Travis CI

[Carol Willing]

Change by Carol Willing :


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[issue33056] LEaking files in concurrent.futures.process

[Andrew Svetlov]

Andrew Svetlov  added the comment:


New changeset 095ee415cee41bf24c3a1108c23307e5baf168dd by Andrew Svetlov 
(Thomas Moreau) in branch 'master':
bpo-33056 FIX leaking fd in concurrent.futures.ProcessPoolExecutor (#6084)
https://github.com/python/cpython/commit/095ee415cee41bf24c3a1108c23307e5baf168dd


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[issue12345] Add math.tau

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Because of its lucky number. See 
https://github.com/python/core-workflow/issues/223 (fixed).

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[issue22674] RFE: Add signal.strsignal(): string describing a signal

[Antoine Pietri]

Antoine Pietri  added the comment:

Done, https://github.com/python/cpython/pull/6085

As I said in the PR body, I can't test it myself, I don't have an OSX VM setup.

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[issue22674] RFE: Add signal.strsignal(): string describing a signal

[Antoine Pietri]

Change by Antoine Pietri :


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[issue33055] bytes does not implement __bytes__()

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

This isn't one exception. For example complex doesn't have the __complex__ 
method.

__str__, __float__, __int__ and __bool__ are implemented in str, float, int and 
bool because there are corresponding special slots in a type object. But 
__bytes__ and __complex__ were added later and they have no slots. Calling them 
for bytes and complex will slowdown creating new object.

The user code rarely needs to call these methods directly. Just call bytes(), 
complex(), str(), float(), etc.

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[issue22674] RFE: Add signal.strsignal(): string describing a signal

[Antoine Pitrou]

Antoine Pitrou  added the comment:

> Should I submit a new PR for this?

Please do.

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[issue12345] Add math.tau

[Mark Dickinson]

Mark Dickinson  added the comment:

Why does this issue keep ending up as the target of unrelated PR notifications?

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[issue22674] RFE: Add signal.strsignal(): string describing a signal

[Antoine Pietri]

Antoine Pietri  added the comment:

Yes, sorry, the issue is that we decided with pitrou to remove the osx specific 
handling.

The fix should be:

diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index fbb12a5b67..ae0351e992 100644
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -58,8 +58,10 @@ class PosixTests(unittest.TestCase):
 self.assertEqual(signal.getsignal(signal.SIGHUP), hup)
 
 def test_strsignal(self):
-self.assertEqual(signal.strsignal(signal.SIGINT), "Interrupt")
-self.assertEqual(signal.strsignal(signal.SIGTERM), "Terminated")
+self.assertTrue(signal.strsignal(signal.SIGINT)
+.startswith("Interrupt"))
+self.assertTrue(signal.strsignal(signal.SIGTERM)
+.startswith("Terminated"))
 
 # Issue 3864, unknown if this affects earlier versions of freebsd also
 def test_interprocess_signal(self):


Should I submit a new PR for this?

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[issue33057] logging.Manager.logRecordFactory is never used

[Ben Feinstein]

New submission from Ben Feinstein :

In logging.Manager, the logRecordFactory attribute is never used.

One would expect that makeRecord() (in logging.Logger) would generate a record 
using its manager's logRecordFactory, or fallback to the global 
_logRecordFactory (if has no manager, or manager.logRecordFactory is None), but 
the latter is used exclusively.

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components: Library (Lib)
files: issue_logRecordFactory.py
messages: 313662
nosy: feinsteinben, vinay.sajip
priority: normal
severity: normal
status: open
title: logging.Manager.logRecordFactory is never used
type: behavior
versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8
Added file: https://bugs.python.org/file47478/issue_logRecordFactory.py

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[issue22674] RFE: Add signal.strsignal(): string describing a signal

[Antoine Pitrou]

Antoine Pitrou  added the comment:

Ned, this is why I'd like issue33048 to be solved :-) Having to rely on the 
buildbot fleet for bugfix iteration is not convenient at all.

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[issue22674] RFE: Add signal.strsignal(): string describing a signal

[Ned Deily]

Ned Deily  added the comment:

test_strsignal is failing on macOS.

==
FAIL: test_strsignal (test.test_signal.PosixTests)
--
Traceback (most recent call last):
  File 
"/Users/nad/Projects/PyDev/active/dev/3x/source/Lib/test/test_signal.py", line 
61, in test_strsignal
self.assertEqual(signal.strsignal(signal.SIGINT), "Interrupt")
AssertionError: 'Interrupt: 2' != 'Interrupt'
- Interrupt: 2
?  ---
+ Interrupt


Also:
http://buildbot.python.org/all/#/builders/14/builds/779/steps/4/logs/stdio
http://buildbot.python.org/all/#/builders/93/builds/435/steps/4/logs/stdio

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stage: resolved -> needs patch
status: closed -> open

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[issue22102] Zipfile generates Zipfile error in zip with 0 total number of disk in Zip64 end of central directory locator

[Thomas Kluyver]

Thomas Kluyver  added the comment:

If every Windows 7 computer is generating zipfiles which are invalid in this 
way, that would be a pretty strong argument for Python (and other tools) to 
accept it. But if that was the case, I would also expect that there would be 
many more issues about it.

Are the files you're compressing large (multi-GB)? Python only uses the zip64 
format when the files are too big for the older zip format; maybe Windows is 
doing the same. Even in that case, I'm still surprised that more people don't 
hit it.

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Re: Initializing error

[Michael F. Stemper]

On 2018-03-10 09:41, Harsh Bhardwaj wrote:

On Mar 5, 2018 11:16 AM, "Harsh Bhardwaj"  wrote:

Plz fix this problem for me. I tried every way to fix this.
Windows 7(32-bit)


That's a pretty bad problem. Fortunately, there is a fix:


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Re: Enumerating all 3-tuples

[Robin Becker]

On 12/03/2018 13:17, Robin Becker wrote:
It's possible to generalize the cantor pairing function to triples, but that may not give you what you want. Effectively you can 
generate an arbitrary number of triples using an iterative method. My sample code looked like this

ct mapping of non-negative integers to triplets.

An alternative approach gives more orderly sequences using a variable base 
number construction

class Tupilator(object):
def __init__(self,degree=3):
self.i = 0
self.n = 2
self.degree = degree

def next(self):
x = self.i
v = []
a =v.append
n = self.n
if not x: a(0)
while x>0:
x, d = divmod(x,n)
a(d)
if sum(v)==self.degree*(n-1):
self.n += 1
pad = self.degree - len(v)
if pad>0:
v += pad*[0]
self.i += 1
return tuple(v)

if __name__=='__main__':
t = Tupilator()
for z in xrange(100):
print z, t.next()


0 (0, 0, 0)
1 (1, 0, 0)
2 (0, 1, 0)
3 (1, 1, 0)
4 (0, 0, 1)
5 (1, 0, 1)
6 (0, 1, 1)
7 (1, 1, 1)
8 (2, 2, 0)
9 (0, 0, 1)
10 (1, 0, 1)
11 (2, 0, 1)
12 (0, 1, 1)
13 (1, 1, 1)
14 (2, 1, 1)
15 (0, 2, 1)
16 (1, 2, 1)
17 (2, 2, 1)
18 (0, 0, 2)
19 (1, 0, 2)
20 (2, 0, 2)
21 (0, 1, 2)
22 (1, 1, 2)
23 (2, 1, 2)
24 (0, 2, 2)
25 (1, 2, 2)
26 (2, 2, 2)
27 (3, 2, 1)
28 (0, 3, 1)
29 (1, 3, 1)
30 (2, 3, 1)
31 (3, 3, 1)
32 (0, 0, 2)
33 (1, 0, 2)
34 (2, 0, 2)
35 (3, 0, 2)
36 (0, 1, 2)
37 (1, 1, 2)
38 (2, 1, 2)
39 (3, 1, 2)
40 (0, 2, 2)



80 (0, 1, 3)
81 (1, 1, 3)
82 (2, 1, 3)
83 (3, 1, 3)
84 (4, 1, 3)
85 (0, 2, 3)
86 (1, 2, 3)
87 (2, 2, 3)
88 (3, 2, 3)
89 (4, 2, 3)
90 (0, 3, 3)
91 (1, 3, 3)
92 (2, 3, 3)
93 (3, 3, 3)
94 (4, 3, 3)
95 (0, 4, 3)
96 (1, 4, 3)
97 (2, 4, 3)
98 (3, 4, 3)
99 (4, 4, 3)





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[issue32972] unittest.TestCase coroutine support

[John Andersen]

John Andersen  added the comment:

I've updated my pull request to do the following:

1. Provide a new AsyncTestCase class which is a subclass of TestCase
2. Run coroutines with a coroutineRunner property.
  a. In 3.6 this calls get_evet_loop.run_until_complete
  b. In 3.7 > this calls asyncio.run
3. setUp, testMethod s, and tearDown can be either async or not

Thoughts?

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Re: Enumerating all 3-tuples

[Elliott Roper]

On 10 Mar 2018, Paul Moore wrote
(in article):

> On 10 March 2018 at 02:18, MRAB  wrote:
> > On 2018-03-10 01:13, Steven D'Aprano wrote:
> > >
> > > I am trying to enumerate all the three-tuples (x, y, z) where each of x,
> > > y, z can range from 1 to ∞ (infinity).
> > >
> > > This is clearly unhelpful:
> > >
> > > for x in itertools.count(1):
> > > for y in itertools.count(1):
> > > for z in itertools.count(1):
> > > print(x, y, z)
> > >
> > > as it never advances beyond x=1, y=1 since the innermost loop never
> > > finishes.
> > >
> > > Georg Cantor to the rescue! (Well, almost...)
> [...]
> > > Can anyone help me out here?
> > Think about the totals of each triple. You'll get totals of 3, then totals
> > of 4, etc.
> >
> > This might help, although the order they come out might not be what you
> > want:
> >
> > def triples():
> > for total in itertools.count(1):
> > for i in range(1, total):
> > for j in range(1, total - i):
> > yield i, j, total - (i + j)
>
> Mathematically, that's the usual generalisation of Cantor's diagonal argument.
>
> Paul

Would a multi-dimensional Hilbert curve do the job? See the Wikipedia article 
for starters

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[issue22102] Zipfile generates Zipfile error in zip with 0 total number of disk in Zip64 end of central directory locator

[Guillaume Carre]

Guillaume Carre  added the comment:

Hi,
In my case the zip file was created from windows 7  context menu (send to)
Regards,
Guillaume

On Mon, Mar 12, 2018 at 5:08 AM, Thomas Kluyver 
wrote:

>
> Thomas Kluyver  added the comment:
>
> I found source code for some other projects handling the same data. They
> all seem to agree that it should be 1:
>
> - Golang's zip reading code: https://github.com/golang/go/blob/
> f7ac70a56604033e2b1abc921d3f0f6afc85a7b3/src/archive/zip/
> reader.go#L536-L538
> - A C contrib file with zlib: https://github.com/madler/zlib/blob/
> cacf7f1d4e3d44d871b605da3b647f07d718623f/contrib/minizip/zip.c#L620-L624
> - Code from Info-ZIP, which is used by many Linux distros, is a bit less
> clear, but it has an illuminating comment:
>
> if ((G.ecrec.number_this_disk != 0x) &&
> (G.ecrec.number_this_disk != ecloc64_total_disks - 1)) {
>   /* Note: For some unknown reason, the developers at PKWARE decided to
>  store the "zip64 total disks" value as a counter starting from 1,
>  whereas all other "split/span volume" related fields use 0-based
>  volume numbers. Sigh... */
>
> So I think you've got an invalid zip file. If it's otherwise valid, there
> might be a case for Python tolerating that particular mistake. But it's
> probably better to fix whatever is making the incorrect zip file, because
> other tools are also going to reject it.
>
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>
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[issue33056] LEaking files in concurrent.futures.process

[Thomas Moreau]

New submission from Thomas Moreau :

The recent changes introduced by https://github.com/python/cpython/pull/3895 
leaks some file descriptors (the Pipe open in _ThreadWakeup).
They should be properly closed at shutdown.

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nosy: tomMoral
priority: normal
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title: LEaking files in concurrent.futures.process
type: behavior
versions: Python 3.7

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[issue26680] Incorporating float.is_integer into the numeric tower and Decimal

[Robert Smallshire]

Robert Smallshire  added the comment:

Apologies for the email splurge. That's the first and last time I'll use the 
email interface to bugs.python.org.

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