New submission from Ram Rachum:
Check the following example out. Putting *args in a function makes its
__defaults__ be empty.
Python 3.4.0b2 (v3.4.0b2:ba32913eb13e, Jan 5 2014, 16:13:26) [MSC v.1600
64 bit (AMD64)] on win32
Type "help", "copyright", "credi
Ram Rachum added the comment:
Though perhaps a note in the documentation would be helpful for future confused
people.
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Python tracker
<http://bugs.python.org/issue20
Ram Rachum added the comment:
My mistake. Thanks for the clarification.
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Ram Rachum added the comment:
My impression is that the `__repr__` method of any object is intended to
describe that object, hopefully in a succinct way, possibly in a REPL-friendly
way (like `list.__repr__` for example) but if not then at least
human-friendly. This is for easy introspection
Ram Rachum added the comment:
New patch attached. Not tested.
--
Added file: http://bugs.python.org/file33729/pathlib.readwrite4.patch
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Python tracker
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Ram Rachum added the comment:
If you'd like to expand this issue's scope to all the objects related to
Signature, I think that'll be good. All objects need good introspection strings.
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Ram Rachum added the comment:
Looks good. Ideally there would be a more details explanation and an example.
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Ram Rachum added the comment:
I take your point and I agree.
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Ram Rachum added the comment:
You're right Chris, I edited the patch naively and didn't know it wouldn't
work. Your patch looks great except you probably want to change "except" to
"accept" :)
I hope I'll have time to work on the documentation addition
Ram Rachum added the comment:
Patch with documentation attached.
--
Added file: http://bugs.python.org/file33840/patch.patch
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Python tracker
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New submission from Ram Rachum:
If there's a circular import in my program, I don't want to see an error
message, "Cannot import name 'foo'" and then say in my mind, "ah, I'm an
experienced Python developer, I know that when Python says that it oft
Ram Rachum added the comment:
Hi everyone,
I'm waiting for someone to review my patch. I believe it includes everything
that's needed to merge.
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New submission from Ram Rachum:
See discussion:
https://groups.google.com/forum/#!searchin/python-ideas/iter/python-ideas/UCaNfAHkBlQ/5vX7JbpCxDkJ
`iter` has a very cool `sentinel` argument. I suggest an additional argument
`exception`; when it's supplied, instead of waiting for a sen
Ram Rachum added the comment:
Any progress on this?
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Ram Rachum added the comment:
(I see some time has passed since the last message. I'm assuming the
issue wasn't fixed, correct me if I'm wrong.)
Here's a use case for using deepcopy: I'm developing a simulations
framework called GarlicSim, all Python. You can see
Ram Rachum added the comment:
+1 for this issue; I've also wished for this feature in the past.
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New submission from Ram Rachum:
I have a a PurePath object like so:
path = PurePath('/home/my awesome user/file.txt')
I'm SSHing into a server and I want to remove the file. So I have to do this:
ssh_client.run(f'/bin/rm {shlex.quote(str(path))}')
Whic
Ram Rachum added the comment:
"This will break any code that pass str(path) to API that doesn't support
pathlib."
I don't understand. Can you give a concrete example of code it would break?
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Ram Rachum added the comment:
I understand now, you're completely right. This change would break the entire
world :)
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New submission from Ram Rachum:
I have a a PurePath object like so:
path = PurePath('/home/my awesome user/file.txt')
I'm SSHing into a server and I want to remove the file. So I have to do this:
ssh_client.run(f'/bin/rm {shlex.quote(str(path))}')
Whic
Changes by Ram Rachum :
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versions: +Python 3.7 -Python 3.6
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New submission from Ram Rachum:
I had this error come up in my code, and because it doesn't use `raise ...
from` I thought that the second error was unexpected, while in fact it wasn't.
This patch should fix that.
--
components: Library (Lib)
files: 1.patch
keywords: patc
Changes by Ram Rachum :
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type: -> behavior
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New submission from Ram Rachum:
LogRecord currently supplies `module` that you can show in your messages, but
it's just the name of the module without the path. It'll be nice to have
`full_module_name` that has the qualified name (e.g. foo.bar.baz instead of
baz.)
Usually it'
Changes by Ram Rachum :
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components: Library (Lib)
nosy: cool-RR
priority: normal
severity: normal
status: open
title: Add geometric mean to `statistics` module
type: enhancement
versions: Python 3.6
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Ram Rachum added the comment:
To complicate things further...
I implemented a geometric mean on my own, and then I figured out what I really
want is a *weighted* geometric mean, so I implemented that for myself. If you'd
want to include that, that'll be cool. Actually I'm not s
Ram Rachum added the comment:
And of course, if the goal of the `statistics` module is to be comprehensive,
one should ask himself what should be the difference between this new module
and a mature statistics module like `scipy.stats`, and whether we should try to
copy the features of off
Changes by Ram Rachum :
--
assignee: docs@python
components: Documentation
nosy: cool-RR, docs@python
priority: normal
severity: normal
status: open
title: docs for `gc.get_referrers` should explain the result format (i.e. what
keys in the dict mean)
versions: Python 2.7, Python 3.2
New submission from Ram Rachum:
My mistake
--
resolution: -> not a bug
status: open -> closed
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New submission from Ram Rachum:
I saw these new interesting classes in the `traceback` docs, but if I were
shown an example of how they are used, I might get inspired to use them in my
own code.
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assignee: docs@python
components: Documentation
messages: 271072
nosy: cool-RR, docs
New submission from Ram Rachum:
I wanted to ensure that the `-O` flag doesn't really do anything more than
remove assert statement and make `__debug__` equal `False`. But the
documentation for `-O` doesn't cover it:
https://docs.python.org/3/using/cmdline.html#cmdoptio
Ram Rachum added the comment:
So... The reasoning is that if someone adds optimizations to Python's `-O` mode
(Something that hasn't happened in the last decade or two, right?) we want to
save them from going to the trouble of writing two or three sentences in the
docs desc
Ram Rachum added the comment:
Yes, my comment was antagonistic. I'm baffled that the first response to
someone who wants to contribute to Python is an esoteric argument against the
contribution. I understand that sometimes not all contributions can be accepted
because they break exi
Ram Rachum added the comment:
Thanks for your understanding David.
I'll submit a patch for this issue soon.
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Ram Rachum added the comment:
I'm sorry everyone, for being unpleasant on this thread. Rereading the thread
from the beginning, I think I misunderstood Brett's message and immediately saw
it as someone trying to block my efforts rather than just answering the
question I asked.
Ram Rachum added the comment:
I uploaded a new patch.
I added another thing: Mentioning explicitly that no other optimizations are
currently being made. I think this is important because it's often the question
that the user is asking themselves. (At least my boss and team members have
Ram Rachum added the comment:
Hi David,
I attached a patch that follows your instructions, but to be honest, if I
wasn't the person writing this patch and I wanted to find the information "Does
Python do any optimization besides dumping asserts when I do -O?" I'm not
New submission from Ram Rachum:
A while ago I was debugging through code that uses the `logging` module, and I
was looking at `Logger` objects and possibly other kinds of objects (maybe
handlers? It was a while ago.)
I was frustrated because I was trying to figure out what a particular logger
Ram Rachum added the comment:
Hmm. What do you think about merging 3.patch now, and then possibly adding more
information later? (Or asking the people who are designing the complex behvior
you describe to write those docs.)
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Ram Rachum added the comment:
Well, I guess we had a fun week exchanging a couple thousand words about a
two-line change to the docs that's now never going to happen ;)
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Ram Rachum added the comment:
Vinay: Looks good to me. What do you think about adding tests?
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Ram Rachum added the comment:
If you want, I can implement them.
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Ram Rachum added the comment:
Okay, but consider that if there are no tests, this code will never be run
during testing. Consider that if there's a bug in that code that causes an
exception to be raised (unlikely, I know, but maybe from the call to
getLevelName) it won't be discover
Ram Rachum added the comment:
Thanks for the patch Steven! I won't comment about the code because I don't
know enough about these algorithms, but I'm thinking, since you also did a
refactoring of the statistics module, maybe these should be two separate
patches/commits so it&#x
Ram Rachum added the comment:
Also... I like the detailed docstrings with the real-life examples! That stuff
helps when coding and using an unfamiliar function (since I see the docs in a
panel of my IDE), so I wish I'd see more detailed docstrings like these ones in
the standard library
Ram Rachum added the comment:
I meant the mathematical definition.
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New submission from Ram Rachum:
I had a code that would freeze, and after debugging I realized that a bug in my
code caused `shlex.split(None)` to be called, which puts Python in an infinite
loop.
We probably want to do an `if not isinstance(s, ...): raise TypeError('Bla
bla')` at
Ram Rachum added the comment:
Was the patch applied? Is there any reason why it should not be applied?
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Ram Rachum added the comment:
(I fixed the patch to not have a typo.)
--
Added file:
http://bugs.python.org/file29290/cpython_patch1of1_8e9346e7ae87.patch.txt
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Changes by Ram Rachum :
Removed file:
http://bugs.python.org/file29006/cpython_patch1of1_8e9346e7ae87.patch
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Ram Rachum added the comment:
Awesome, thanks!
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New submission from Ram Rachum:
There's no mention of `match.regs` in the documentation of the `re` module.
--
assignee: docs@python
components: Documentation
messages: 189859
nosy: cool-RR, docs@python
priority: normal
severity: normal
status: open
title: No mention of `match.reg
Ram Rachum added the comment:
Ethan: I'm very confused by your example. `huh` isn't even a method, why would
it be included? Or are you saying "if it was a method"? I'm really not sure
what your example is adding over mine, given that it's 10 times longer and m
New submission from Ram Rachum:
When programming, I just got this exception:
builtins.TypeError: my_func() takes 1 positional argument but 2 were given
After a couple of minutes of investigation I figured out that the problem is
that the function has a `*` in its signature, so arguments
Ram Rachum added the comment:
(I should note that I see this suggestion as low-priority, because it's very
specific, so I'll completely understand if it's deemed to not be worth the
added complexity.)
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Ram Rachum added the comment:
I agree with Brett. Making old functions support `Path` sounds trivial to me,
and I don't think there are any backward compatibility issues. Having to do
str(path) every time you call a function is ugly. So I think that all stdlib
functions that currently t
Ram Rachum added the comment:
Fine, so you add an `if isinstance...` in front of it and you're done.
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Ram Rachum added the comment:
Georg: You're right, I forgot about C modules which make this not as trivial as
I thought.
As for Python modules: If there's general agreement that this is a feature we
want, I'll be happy to make a patch for the `zipfile` module to accept `P
New submission from Ram Rachum:
The builtin `property` lets you specify a `doc` argument for your properties,
which is great because then it shows up in `help`. So I figured that when I'm
writing my own descriptor, I could set `__doc__` on it and have `help` use it.
Not so, `help` ignor
Ram Rachum added the comment:
Thanks for the fix Ethan. Will you also push this to the backport on PyPI?
--
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Python tracker
<http://bugs.python.org/issue22
Ram Rachum added the comment:
Thanks!
Two questions:
1. Is there a GitHub repo for enum34? Couldn't find a link to it on the PyPI
page.
2. Aren't 'name' and 'value' already included in `added_behavior`?
--
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Ram Rachum added the comment:
Also, aren't you excluding a lot of important magic methods from that `dir`?
--
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Python tracker
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Ram Rachum added the comment:
Hi everyone,
Just wanted to follow up here that I've created my own dedicated bag class.
Documentation: https://combi.readthedocs.org/en/stable/bags.html
Install using `pip install combi`
It's packed with features. There are a ton of arithmetic
Changes by Ram Rachum :
--
components: Library (Lib)
nosy: cool-RR
priority: normal
severity: normal
status: open
title: Implement `http.client.HTTPMessage.__repr__` to make debugging easier
type: enhancement
versions: Python 3.5
___
Python tracker
Ram Rachum added the comment:
Regarding a unified `__repr__`: Sounds good. What I needed is to know whether
there are any headers in there or not. So the number of headers, or the first
2-3, would have solved my problem.
--
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Python tracker
New submission from Ram Rachum:
Python 3.5.0b2 (v3.5.0b2:7a088af5615b, May 31 2015, 06:22:19) [MSC v.1900 64
bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
Ram Rachum added the comment:
I'm seeing a similar problem with `move_to_end` and its `last` keyword argument.
--
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Python tracker
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Ram Rachum added the comment:
A problem I just realized with Brian's 2-line implementation of `filter`: It
doesn't work for iterables which aren't sequences, since it attempts to exhaust
the iterable twice. So if you have a non-sequence you'll have to make it in
Ram Rachum added the comment:
Ethan: That's what I also thought, but then I figured that you're creating N
futures anyway with an item attached to each, so it's on the same scale as
creating a list, no?
--
___
Python
Ram Rachum added the comment:
Right, so it might be garbage-collecting the items before the futures are done
being created, so the whole list wouldn't need to be saved in memory. I
understand now.
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Python tracker
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New submission from Ram Rachum:
Today I spent 30 minutes because of weird behavior of `finally` when it has a
`break` statement inside of it. (The behavior is that the exception gets
suppressed, which I found unexpected.) I think this behavior should be
documented.
Example:
c
Ram Rachum added the comment:
I thought about it some more, and personally I'd prefer each function to do
`str(path)` internally rather than `if hasattr(p, 'path'): p = p.path`. Even if
it means we'll have to deal with "where did that file named '' come from?
Ram Rachum added the comment:
Here's an alternate idea I thought of now. Maybe `path.path` should be a
pointer to the same `Path` object, so every function will do this:
str(arg.path) if hasattr(arg, 'path') else arg
What I like about this is that it avoids having the pat
New submission from Ram Rachum:
Right now when you want to use `subprocess.STARTUPINFO`, you need to do
something like this:
si = subprocess.STARTUPINFO()
si.dwFlags = subprocess.STARTF_USESTDHANDLES
subprocess.Popen(['whatever'], startupinfo=si)
It would be much nicer
Ram Rachum added the comment:
Agreed on keywords-only.
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Changes by Ram Rachum :
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components: Library (Lib)
nosy: cool-RR
priority: normal
severity: normal
status: open
title: Implement pathlib.Path.link (Using os.link)
versions: Python 3.6
___
Python tracker
<http://bugs.python.org/issue26
Ram Rachum added the comment:
ztane: I don't think so. You're taking attention away from the "and
keyword-only arguments", where in fact this is the piece of information that's
likely to save the user the most time, so therefore it s
Ram Rachum added the comment:
Looking forward to your patch Ofer! Thanks for working on this!
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___
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New submission from Ram Rachum:
`Executor.filter` is to `filter` what `Executor.map` is to `map`.
See Python-ideas thread:
https://groups.google.com/forum/#!topic/python-ideas/EBOC5YCWPyo
Patch attached. I don't know how to run the Python test suite (I'm guessing it
involves build
Ram Rachum added the comment:
Also, I notice Python 3.5 feature freeze is a bit over a week away, and I hope
we can get that in so it could go in Python 3.5. (Assuming it goes in at all.)
--
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Python tracker
<http://bugs.python.org/issue24
Ram Rachum added the comment:
Patch with documentation attached. (I don't know how to concatenate patches, so
2.patch contains only the documentation, while 1.patch has the implementation
and the tests (but Ethan's patch is better.))
Brian, regarding your simpler implementatio
Ram Rachum added the comment:
Okay, let me understand what the opinions of people are about this feature.
Ram Rachum: +1
Antoine Pitrou: -1
Nick Coghlan: Is that a +1 or a +0?
Ethan and Paul, you've participated but I didn't get your opinion on whether
you want to see this feature g
Ram Rachum added the comment:
Looks like this a recipe in the docs is where this ticket is headed.
I took my original example for `Executor.filter` and changed it using Brian's
suggestion so now it uses `Executor.map`. Please check it out. If someone other
than me feels comfortable in pu
Ram Rachum added the comment:
Raymond: Thank you. So the discussion is back on adding a recipe to the docs.
Brian: When I said "possible issues", I followed that with a couple of issues
with the example I uploaded (filter_example.py).
--
New submission from Ram Rachum:
I was trying to read this page:
https://www.python.org/dev/peps/pep-0492/#acceptance
On my mobile. (Nexus 5, chrome.) But when scrolling down the page, the browser
sometimes scrolls up to the top of the page. This makes reading very annoying
because I have to
New submission from Ram Rachum:
Both `WeakKeyDictionary` and `WeakValueDictionary` have opaque `__repr__`
methods:
>>> x = weakref.WeakKeyDictionary({object: 2, type: 4,})
>>> x
>>> dict(x)
{: 4, : 2}
This makes it annoying to view them at a glance. Is there a re
New submission from Ram Rachum:
In `logging.config.DictConfigurator.configure`, there are exceptions that are
caught and then replaced with `ValueError` exceptions. I think you should use
the `raise x from y` syntax so that the original tracebacks will be preserved.
(I'm debugging su
Ram Rachum added the comment:
I now see similar raises that could use a `from` in other places in this
module, so I'd suggest going over the module and putting `from`s all over the
place.
--
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Python tracker
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Ram Rachum added the comment:
You're right Vinay: I missed that first traceback because I wasn't running code
in the console, I was running it with a debugger. (I'll ask my debugger vendor
to maybe include these extra tracebacks.)
But in any case, I think that the correct way
Ram Rachum added the comment:
Thanks for the patch sreyas! Maybe we should also take this opportunity to
remove the string formatting from the exception that shows the name of the
original exception? Because when you think about it, it's just a poor man's
`
Ram Rachum added the comment:
Thanks for the quick fix Vinay!
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New submission from Ram Rachum:
Today I had to check whether a path object started with `/foo`. The nicest way
I could think of was `str(p).startswith('/foo')`. What do you think about
implementing `p.startswith('/foo')`?
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components: Library (Lib)
messages:
Ram Rachum added the comment:
I mean that `/foo` is one of the parent directories.
"there are plenty of options ..." Can you please spell them out precisely? The
full line of code.
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Ram Rachum added the comment:
Thanks.
--
resolution: -> wont fix
status: open -> closed
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Changes by Ram Rachum :
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components: Library (Lib)
nosy: cool-RR
priority: normal
severity: normal
status: open
title: Support creating hardlink using `pathlib`
type: enhancement
versions: Python 3.7
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New submission from Ram Rachum:
Currently it complains that you haven't fed it a string-like object.
--
components: Library (Lib)
messages: 280133
nosy: cool-RR
priority: normal
severity: normal
status: open
title: Let `shlex.quote` accept a `PathLike` object
type: enhancement
ver
Changes by Ram Rachum :
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type: -> enhancement
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Changes by Ram Rachum :
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components: Library (Lib)
nosy: cool-RR
priority: normal
severity: normal
status: open
title: Make the `cwd` argument to `subprocess.Popen` accept a `PathLike`
versions: Python 3.7
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