[issue29636] Specifying indent in the json.tool command

R. David Murray added the comment: Easier, but if we do it in the tool, then it is done for everyone and they don't *each* have to spend that "less time" writing their own script. And --indent and --compact are both useful for debugging/hand testing, since it allows you to generate the input

Re: Dynamically replacing an objects __class__; is it safe?

On 16/03/17 13:45, Robin Becker wrote: On 15/03/2017 13:53, Steve D'Aprano wrote: You probably can't make a whale fly just by changing the class to bird. It will need wings, and feathers, at the very least. the whale in the Hitchhiker's Guide found itself flying without feathers or wings It

Re: The ternaery operator

On 03/16/2017 01:12 AM, Gregory Ewing wrote: > Stefan Ram wrote: > >> a if c else b >> >> Guido has invented something totally new. Why? > > It's arguably closer to the way you would say such a > thing in English. > > Consider the following sentences: > > "I wear my red shirt if it's

Re: Dynamically replacing an objects __class__; is it safe?

On 16/03/2017 14:03, D'Arcy Cain wrote: On 2017-03-16 09:45 AM, Robin Becker wrote: On 15/03/2017 13:53, Steve D'Aprano wrote: You probably can't make a whale fly just by changing the class to bird. It will need wings, and feathers, at the very least. the whale in the Hitchhiker's Guide

[issue29827] os.path.exists() returns False for certain file name

Marko Mavrinac added the comment: I am sorry, I didn't realize \t affected how the path was recognized. -- ___ Python tracker ___

Re: Dynamically replacing an objects __class__; is it safe?

On Fri, Mar 17, 2017 at 1:21 AM, Robin Becker wrote: >> Falling is not the same as flying unless you accidentally miss the ground. >> > well in English an arrow flies as well as time, the whale was very > interested in the approaching ground and perhaps forgot to conjure up >

[issue29636] Specifying indent in the json.tool command

Daniel Himmelstein added the comment: @serhiy.storchaka I totally understand the desire to keep json.tool simple. However, given the description of json.tool in the documentation (below), I think an indentation option is within scope: > The json.tool module provides a simple command line

[issue29636] Specifying indent in the json.tool command

Serhiy Storchaka added the comment: It's not just the support burden. It is also a burden of learning and remembering new API. The support burden itself is not tiny too. It includes careful designing, writing the implementation and test (the more options you have the more combinations you

[issue29827] os.path.exists() returns False for certain file name

Eryk Sun added the comment: In a string literal, '\t' represents a tab character (ordinal 9). Windows filenames cannot contain control characters [1], i.e. ordinals 1-31. For path literals I recommend using forward slashes and normalizing via os.path.normpath, e.g. filepath =

Re: Dynamically replacing an objects __class__; is it safe?

On 15/03/2017 13:53, Steve D'Aprano wrote: You probably can't make a whale fly just by changing the class to bird. It will need wings, and feathers, at the very least. the whale in the Hitchhiker's Guide found itself flying without feathers or wings -- Robin Becker --

Re: Dynamically replacing an objects __class__; is it safe?

On 2017-03-16 09:45 AM, Robin Becker wrote: On 15/03/2017 13:53, Steve D'Aprano wrote: You probably can't make a whale fly just by changing the class to bird. It will need wings, and feathers, at the very least. the whale in the Hitchhiker's Guide found itself flying without feathers or wings

[issue29820] Broken link to "GUI Programming with Python: QT Edition" book

Mariatta Wijaya added the comment: Thanks, Marco. That sounds good. Let's just remove the reference to the books from both PyQt and wxPython. -- keywords: +easy stage: -> needs patch ___ Python tracker

[issue29828] Allow registering after-fork initializers in multiprocessing

Yury Selivanov added the comment: Maybe a better way would be to proceed with http://bugs.python.org/issue16500? -- nosy: +yselivanov ___ Python tracker

[issue29828] Allow registering after-fork initializers in multiprocessing

New submission from Antoine Pitrou: Currently, multiprocessing has hard-coded logic to re-seed the Python random generator (in the random module) whenever a process is forked. This is present in two places: `Popen._launch` in `popen_fork.py` and `serve_one` in `forkserver.py` (for the "fork"

[issue29640] _PyThreadState_Init and fork race leads to inconsistent key list

Charalampos Stratakis added the comment: In order to reproduce: Apply the python.patch from bz1268226_reproducer2.tar.gz Compile python Run the reproduce4.py from bz1268226_reproducer2.tar.gz As indicated by the reproducer, the status returned by os.wait() for the child is 139. I will

[issue28261] wrong error messages when using PyArg_ParseTuple to parse normal tuples

Oren Milman added the comment: as Serhiy pointed out in PR 668, here are some more functions that produce the same kind of wrong error messages: - Modules/timemodule.c - gettmarg() - Modules/socketmodule.c: * getsockaddrarg() * socket_getnameinfo() ISTM that searching

[issue29636] Specifying indent in the json.tool command

Bob Ippolito added the comment: Probably the best thing we could do here is to mirror the options available in similar tools, such as jq: https://stedolan.github.io/jq/manual/#Invokingjq The relevant options here would be: --indent --tab --compact-output --sort-keys The

Re: SimpleHTTPServer and CgiHTTPServer in practice

For a couple of years we've used SimpleHTTPServer to serve pages to internal users at low volumes, and we find it to be reliable and trivial to set up. We have not subjected it to a rigorous security assessment. HTH, Steve J. Martin -- https://mail.python.org/mailman/listinfo/python-list

Re: Dynamically replacing an objects __class__; is it safe?

Robin Becker wrote: > On 16/03/2017 14:03, D'Arcy Cain wrote: > > On 2017-03-16 09:45 AM, Robin Becker wrote: > >> On 15/03/2017 13:53, Steve D'Aprano wrote: > >>> You probably can't make a whale fly just by changing the class to > >>> bird. It > >>> will need wings, and

Re: The ternaery operator

> > I think it would be nice to have a way of getting the 'true' > value as the return with an optional value if false. The desire > comes about when the thing I'm comparing is an element of a collection: > >drugs['choice'] if drugs['choice'] else 'pot' > > Then I'm tempted to do: > >

[issue29829] Documentation lacks clear warning of subprocess issue with pythonw

New submission from Steve Barnes: When running under pythonw, or pyinstaller with the -w flag, modules that use subprocess calls such as popen, run, etc. will crash if the default `stdout=None, stderr=None` behaviour is used rather than PIPE. This is an obscure problem which is very hard to

[issue29820] Broken link to "GUI Programming with Python: QT Edition" book

Marco Buttu added the comment: Hi Mariatta, all the other seealso entries (PyGObject, PySide, ...) have references to some specific books and tutorials. No one has a reference to the wiki, maybe because there is already a reference to it (at the end of the page). IMHO we can keep the PyQt

Re: The ternaery operator

William Mayor writes: >> I think it would be nice to have a way of getting the 'true' value as >> the return with an optional value if false. The desire comes about >> when the thing I'm comparing is an element of a collection: >> >>drugs['choice'] if drugs['choice'] else 'pot' >> >>

[issue29826] " don't work on Mac under IDLE

Changes by Brett Cannon : -- assignee: -> terry.reedy components: +IDLE nosy: +terry.reedy title: " don't work on Mac -> " don't work on Mac under IDLE ___ Python tracker

Re: The ternaery operator

On 03/16/2017 01:12 AM, Gregory Ewing wrote: > Stefan Ram wrote: > >> a if c else b >> >> Guido has invented something totally new. Why? > > It's arguably closer to the way you would say such a > thing in English. > > Consider the following sentences: > > "I wear my red shirt if it's

Re: The ternaery operator

On Thu, 16 Mar 2017 03:12:32 +, Stefan Ram wrote: > The syntax > > a if c else b > > looks as if Guido made it intentionally ugly so that it will not be > used? > > Being able to detect patterns that are in widespread use among > programming languages enhances readability. > >

Re: Dynamically replacing an objects __class__; is it safe?

On Thu, 16 Mar 2017 14:04:19 +, Jon Ribbens wrote: > On 2017-03-16, Robin Becker wrote: >> On 15/03/2017 13:53, Steve D'Aprano wrote: >>> You probably can't make a whale fly just by changing the class to >>> bird. It will need wings, and feathers, at the very least. >>

[issue29828] Allow registering after-fork initializers in multiprocessing

Changes by Antoine Pitrou : -- nosy: +njs ___ Python tracker ___ ___ Python-bugs-list mailing

Re: Dynamically replacing an objects __class__; is it safe?

MRAB wrote: Could you argue that the blades were a kind of wing? After all, they rely on the same principle of moving through the air to produce lift. Balloons, on the other hand, ... :-) Also rockets. -- Greg -- https://mail.python.org/mailman/listinfo/python-list

[issue29824] Hostname validation in SSL match_hostname()

Christian Heimes added the comment: I don't see 1) as a problem. You won't be able to resolve these names in DNS, would you? Regarding 2). Yes, it would be beneficial to have more elaborate checks to protect against wildcard attacks like *.com. However Python is not a browser. It's really

[issue29825] PyFunction_New() not validate code object

New submission from LCatro: PyFunction_New() not validate code object ,so we can make a string object to fake code object This is Python ByteCode : LOAD_CONST '\x41\x41\x41\x41' MAKE_FUNCTION 0 in source code ,we can see that string object trace to variant

Re: Dynamically replacing an objects __class__; is it safe?

On Thu, 16 Mar 2017 11:03:56 +1300, Gregory Ewing wrote: > Steve D'Aprano wrote: >> You probably can't make a whale fly just by changing the class to bird. >> It will need wings, and feathers, at the very least. > > Some things succeed in flying with neither wings nor feathers. > Helicopters,

[issue29826] " don't work on Mac

New submission from Marco Viscito: When typing the ' key or the " key on the IDLE Python application for macOS, the application. I think it might have something to do with that beta version of Tcl/Tk (8.5.9) as Python says it is 'unstable'. -- files: Screen Shot 2017-03-16 at

[issue29824] Hostname validation in SSL match_hostname()

New submission from Suphannee: 1. Allowing attempting to match invalid hostname According to domain name specification in RFC 1035, only alphanumeric, dot and hyphen are valid characters in domain name. We observe that the function match_hostname() in Lib/ssl.py allows other special characters

Re: how to embed non-tkinter VLC player into grid of tkinter with python?

Am 16.03.17 um 05:40 schrieb Ho Yeung Lee: we have many TV that would like to be monitored, how to embed non-tkinter VLC player into grid of tkinter with python? below code can embeded xterm but not for VLC player import vlc from Tkinter import * import os root = Tk() for r in range(2):

Re: The ternaery operator

Am 16.03.17 um 04:12 schrieb Stefan Ram: The syntax a if c else b looks as if Guido made it intentionally ugly so that it will not be used? [...] . But now Guido has invented something totally new. Why? The rationale can be read in PEP 308:

[issue29824] Hostname validation in SSL match_hostname()

Changes by Christian Heimes : -- nosy: +alex, dstufft, janssen ___ Python tracker ___ ___

Re: Dynamically replacing an objects __class__; is it safe?

On Wed, 15 Mar 2017 19:10:17 -0700, Deborah Swanson wrote: > MRAB wrote, on Wednesday, March 15, 2017 3:19 PM >> >> On 2017-03-15 22:03, Gregory Ewing wrote: >> > Steve D'Aprano wrote: >> >> You probably can't make a whale fly just by changing the class to >> >> bird. It will need wings, and

Re: The ternaery operator

Stefan Ram wrote: a if c else b Guido has invented something totally new. Why? It's arguably closer to the way you would say such a thing in English. Consider the following sentences: "I wear my red shirt if it's Tuesday, else my green one." "I wear if it's Tuesday my red shirt, else my

Re: Dynamically replacing an objects __class__; is it safe?

On Thu, 16 Mar 2017 09:03 am, Gregory Ewing wrote: > Steve D'Aprano wrote: >> You probably can't make a whale fly just by changing the class to bird. >> It will need wings, and feathers, at the very least. > > Some things succeed in flying with neither wings nor feathers. > Helicopters, for

[issue29829] Documentation lacks clear warning of subprocess issue with pythonw

R. David Murray added the comment: A warning is not appropriate (we reserve those for things that are security related, pretty much). A sentence might be, though. For example, we could change the initial discussion of the run function to say: This does not capture stdout or stderr by

Doing it Wrong: python-ldap and delete operations using ldifWriter

I want to do (what I thought) would be quite a simple thing. I have an LDAP entry that looks like this(in LDIF format): dn: cn=myorg,ou=teams,ou=groups,o=company,c=us cn: myorg objectClass: top objectClass: CompanyTeams objectClass: groupOfUniqueNames owner: cn=john,ou=people,o=company,c=us

[issue29828] Allow registering after-fork initializers in multiprocessing

Antoine Pitrou added the comment: That issue seems to have stalled as it seems to have focussed on low-level APIs, and also because it is proposing a new module with the API question that entails. Another possible stance is that os.fork() should be left as-is, as a low-level primitive, and

Re: Dynamically replacing an objects __class__; is it safe?

On 2017-03-16, Robin Becker wrote: > On 15/03/2017 13:53, Steve D'Aprano wrote: >> You probably can't make a whale fly just by changing the class to bird. It >> will need wings, and feathers, at the very least. > > the whale in the Hitchhiker's Guide found itself flying

[issue6721] Locks in the standard library should be sanitized on fork

Daniel Birnstiel added the comment: Currently using Python 3.6.0 (default, Mar 4 2017, 12:32:34) [GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.42.1)] on darwin > So, somehow the print() statement is blocking, which I have /no/ idea how to > go about debugging. I assume there's a lock

[issue29827] os.path.exists() returns False for certain file name

New submission from Marko Mavrinac: I have two files in two different folders, both on desktop. If I try using os.path.exists() on both of them, it returns True for one file and False for the other file. After renaming file that I got False from, I get returned True and when I rename it back,

[issue29830] pyexpat.errors doesn't have __spec__ and __loader__ set

New submission from Manuel Jacob: The same applies to pyexpat.model. It seems like pyexpat is the only builtin module which has submodules (errors, model). Normally, as I understand it, the module gets imported given a spec and the import machinery ensures that this spec ends up in the

[issue29826] " don't work on Mac under IDLE

Ned Deily added the comment: Yes, this is a symptom of using the default Apple-supplied macOS Tcl/Tk. See https://www.python.org/download/mac/tcltk/ for more information as the warning in IDLE suggests. If you are using Python 3.6.0 downloaded from python.org, the simple solution is to

[issue19521] Parallel build race condition on AIX since python-2.7

Changes by Michael Haubenwallner : -- pull_requests: +560 ___ Python tracker ___

[issue29636] Specifying indent in the json.tool command

Serhiy Storchaka added the comment: I'm not particularly interested in this feature. Adding two or three options looks excessive. Python is a programming language and it is easy to write a simple script for your needs. Much easier than implement the general command line interface that

Re: Dynamically replacing an objects __class__; is it safe?

Chris Angelico wrote: I just asked my father, and he believes that a satellite DOES fly, on the basis that it is perpetually falling and forever missing the ground. Also, NASA people talk about "flying" the ISS, so it seems your father is in good company. -- Greg --

[issue29828] Allow registering after-fork initializers in multiprocessing

Yury Selivanov added the comment: BTW, why can't you use `pthread_atfork` in numpy? -- ___ Python tracker ___

[issue29777] argparse arguments in main parser hide an argument in subparser

Alan Evangelista added the comment: PA> In http://bugs.python.org/issue14910#msg204678 I suggest a subclassing patch that might work with Py2. This solves my particular case. I do not use any argument with action='count', so the regression introduced by the new option does not affect me.

[issue29777] argparse arguments in main parser hide an argument in subparser

Alan Evangelista added the comment: s/Python 2.6/Python 2/ in last comment -- ___ Python tracker ___ ___

Re: The ternaery operator

Tobiah wrote: To be fair, the proper comparison would be: If it's Tuesday, I wear my red shirt, else my green one. The Python analog of that would be if it_is_tuesday: wear(red_shirt) else: wear(green_shirt) i.e. a statement rather than an expression. We're

[issue29828] Allow registering after-fork initializers in multiprocessing

Davin Potts added the comment: Having a read through issue16500 and issue6721, I worry that this could again become bogged down with similar concerns. With the specific example of NumPy, I am not sure I would want its random number generator to be reseeded with each forked process. There are

[issue29828] Allow registering after-fork initializers in multiprocessing

Nathaniel Smith added the comment: I think ideally on numpy's end we would reseed iff the RNG was unseeded. Now that I think about it I'm a little surprised that we haven't had more complaints about this, so I guess it's not a super urgent issue, but that would be an improvement over the

[issue29820] Broken link to "GUI Programming with Python: QT Edition" book

Changes by Marco Buttu : -- pull_requests: +561 ___ Python tracker ___ ___

[issue29828] Allow registering after-fork initializers in multiprocessing

Antoine Pitrou added the comment: The use case is quite clear here. The specific need to re-seed the Numpy PRNG has already come up in two different projects I work on: Numba and Dask. I wouldn't be surprised if other libraries have similar needs. If you want a reproducible RNG sequence,

[issue29831] os.path.exists seems can not recgnize "~"

New submission from quanyechavshuo: os.system is ok to recgnize "~",but os.path.exists can not recgnize "~". eg: #1.py: import os os.system("ls -al ~/.zshrc") python3 1.py output: -rw-r--r-- 1 root wheel 5391 3 14 18:12 /var/root/.zshrc #2.py: import os a=os.path.exists("~/.zshrc")

[issue29831] os.path.exists seems can not recgnize "~"

Josh Rosenberg added the comment: That's because os.system is executing the command in a shell (which expands ~). Without shell support, ~ doesn't mean anything unless used with the APIs that specifically support it (e.g. os.path.expanduser). You wanted

[issue29831] os.path.exists seems can not recgnize "~"

Martin Panter added the comment: I agree with Josh. This is how it is supposed to work. os.system calls the shell (e.g. Bash) rather than running the "ls" program directly. Unix shells translate "~" to the home directory (as well as translating a lot of other stuff, e.g. spaces to separate

RE: Dynamically replacing an objects __class__; is it safe?

Steve D'Aprano wrote,on March 16, 2017 5:07 AM > > On Thu, 16 Mar 2017 09:03 am, Gregory Ewing wrote: > > > Steve D'Aprano wrote: > >> You probably can't make a whale fly just by changing the class to > >> bird. It will need wings, and feathers, at the very least. > > > > Some things succeed

Re: SimpleHTTPServer and CgiHTTPServer in practice

Some Python users have told me that isn't a good idea, but without any specifics. We don't know *why* those people told you not to use these modules. We also don't know your use case. So it is very hard to advise you. Lutz -- https://mail.python.org/mailman/listinfo/python-list

[issue29826] " don't work on Mac under IDLE

Ned Deily added the comment: > Is this restriction correct? Yes -- ___ Python tracker ___ ___

Re: The ternaery operator

On Fri, Mar 17, 2017 at 10:45 AM, Stefan Ram wrote: > Gregory Ewing writes: >>wear(red_shirt if it_is_tuesday else green_shirt) > > Operators in Python usually are written with special > symbols, not with words, so a word usually

Re: SimpleHTTPServer and CgiHTTPServer in practice

Lutz Horn writes: > We don't know *why* those people told you not to use these modules. We > also don't know your use case. So it is very hard to advise you. The use case is to have a very easily set up way to serve basic pages and files, without a lot of configuration files

[issue29826] " don't work on Mac under IDLE

Terry J. Reedy added the comment: Marco, did you see this message? (r"WARNING: The version of Tcl/Tk ({0}) in use may" r" be unstable.\n" r"Visit http://www.python.org/download/mac/tcltk/; r" for current information.".format(patchlevel)) Or is it somehow lost? Ned, the version check for

[issue29820] Broken link to "GUI Programming with Python: QT Edition" book

Changes by Mariatta Wijaya : -- pull_requests: +562 ___ Python tracker ___ ___

[issue29820] Broken link to "GUI Programming with Python: QT Edition" book

Changes by Mariatta Wijaya : -- pull_requests: +563 ___ Python tracker ___ ___

Re: Dynamically replacing an objects __class__; is it safe?

On Fri, Mar 17, 2017 at 1:52 PM, Ian Kelly wrote: > On Thu, Mar 16, 2017 at 7:56 PM, Dennis Lee Bieber > wrote: >> On Fri, 17 Mar 2017 10:03:04 +1300, Gregory Ewing >> declaimed the following: >> >>>Chris Angelico wrote:

[issue29820] Broken link to "GUI Programming with Python: QT Edition" book

Mariatta Wijaya added the comment: Thanks Marco :) I merged your PR, and backported to 3.5 and 3.6. There are some merge conflict with the 2.7 branch, so I decided not to bother with it. -- resolution: -> fixed stage: needs patch -> resolved status: open -> closed versions: -Python

[issue29829] Documentation lacks clear warning of subprocess issue with pythonw

Eryk Sun added the comment: An exception (not a crash) is possible if a standard handle is invalid and a Popen call tries to replace one or two of the other standard handles (e.g. stdin is invalid and you pass the argument stdout=PIPE). Note that subprocess uses the standard handles directly,

Re: The ternaery operator

Stefan Ram wrote: A postponed »if« can be found (x if a, otherwise y), but a preceding »if« (if a, x, otherwise y) also is found often. Yes, both forms occur in English. The point is that Guido didn't just make the idea up, it was inspired by natural language. -- Greg --

Re: Dynamically replacing an objects __class__; is it safe?

On Thu, Mar 16, 2017 at 7:56 PM, Dennis Lee Bieber wrote: > On Fri, 17 Mar 2017 10:03:04 +1300, Gregory Ewing > declaimed the following: > >>Chris Angelico wrote: >>> I just asked my father, and he believes that a satellite DOES fly, on >>> the

[issue28415] PyUnicode_FromFormat integer format handling different from printf about zeropad

Changes by Xiang Zhang : -- keywords: +easy stage: -> needs patch ___ Python tracker ___

How to add a built-in library in pyhton

Hello, everybody: I use python2.7.10 and want to add a c language library in python. So how can i built it as a built-in module in python? -- https://mail.python.org/mailman/listinfo/python-list

Re: Dynamically replacing an objects __class__; is it safe?

Dennis Lee Bieber wrote: I'd say satellites do "not" fly, as they have no force/action opposing the fall caused by the pull of gravity. Arrows, bullets, thrown stones, etc. are often said to be flying. Seems to me the word gets applied to anything that is moving while not contacting

Re: Dynamically replacing an objects __class__; is it safe?

Chris Angelico wrote: Maybe what the ISS does isn't flying - it's falling with style? Yep. They didn't really launch it into orbit with rockets, that was all faked. They actually hauled it up there with a crane, let it go and pulled the earth away at the last moment. -- Greg --