[issue43219] shutil.copy raises IsADirectoryError when the directory does not actually exist

[Jeremy Pinto]

Jeremy Pinto  added the comment:

In fact, the issue seems to be coming from open() itself when opening a 
non-existent directory in write mode:

[nav] In [1]: import os
 ...: nonexixstent_dir = 'not_a_dir/'
 ...: assert not os.path.exists(nonexixstent_dir)
 ...: with open(nonexixstent_dir, 'wb') as fdst:
 ...: pass
---
IsADirectoryError Traceback (most recent call last)
 in 
  2 dir_path = 'not_a_dir/'
  3 assert not os.path.exists(nonexixstent_dir)
> 4 with open(nonexixstent_dir, 'wb') as fdst:
  5 pass

IsADirectoryError: [Errno 21] Is a directory: 'not_a_dir/'

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[issue43219] shutil.copy raises IsADirectoryError when the directory does not actually exist

[Jeremy Pinto]

New submission from Jeremy Pinto :

Issue: If you try to copy a file to a directory that doesn't exist using 
shutil.copy, a IsADirectory error is raised saying the directory exists. 

This issue is actually caused when `open(not_a_dir, 'wb') is called on a 
non-existing dir.

Expected behaviour: Should instead raise NotADirectoryError
-

Steps to reproduce:

[nav] In [1]: import os
 ...: from pathlib import Path
 ...: from shutil import copy
 ...:
 ...: tmp_file = '/tmp/some_file.txt'
 ...: Path(tmp_file).touch()
 ...: nonexistent_dir = 'not_a_dir/'
 ...: assert not os.path.exists(nonexistent_dir)
 ...: copy(tmp_file, nonexistent_dir)
---
IsADirectoryError Traceback (most recent call last)
 in 
  7 nonexistent_dir = 'not_a_dir/'
  8 assert not os.path.exists(nonexistent_dir)
> 9 copy(tmp_file, nonexistent_dir)

~/miniconda3/lib/python3.7/shutil.py in copy(src, dst, follow_symlinks)
243 if os.path.isdir(dst):
244 dst = os.path.join(dst, os.path.basename(src))
--> 245 copyfile(src, dst, follow_symlinks=follow_symlinks)
246 copymode(src, dst, follow_symlinks=follow_symlinks)
247 return dst

~/miniconda3/lib/python3.7/shutil.py in copyfile(src, dst, follow_symlinks)
119 else:
120 with open(src, 'rb') as fsrc:
--> 121 with open(dst, 'wb') as fdst:
122 copyfileobj(fsrc, fdst)
123 return dst

IsADirectoryError: [Errno 21] Is a directory: 'not_a_dir/'

--
messages: 386932
nosy: jerpint
priority: normal
severity: normal
status: open
title: shutil.copy raises IsADirectoryError when the directory does not 
actually exist
versions: Python 3.7

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[issue40562] SEO: differentiate between Python 2 and Python 3 docs on Google SERP

[Pinto]

Pinto  added the comment:

Merci Julien j'ai reussi à régler le même problème rencontré sur mon site 
https://lesmarketing.fr/agence-seo-montpellier/

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[issue40562] SEO: differentiate between Python 2 and Python 3 docs on Google SERP

[Pinto]

Pinto  added the comment:

I have the same problem on my site https://lesmarketing.fr I deactivated the 
breadcrumbs, you have found a solution ?

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nosy: +khaled

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[issue36085] Enable better DLL resolution

[David Miguel Susano Pinto]

David Miguel Susano Pinto  added the comment:

I have just found out that commit 2438cdf0e93 which added the winmode argument 
and the documentation for it disagree. Documentation states that default is 
zero while the real default in code is None.

I have opened PR 19167 on github to address it

--
message_count: 60.0 -> 61.0
nosy: +carandraug
nosy_count: 14.0 -> 15.0
pull_requests: +18563
pull_request: https://github.com/python/cpython/pull/19167

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[issue35338] set union/intersection/difference could accept zero arguments

[David Miguel Susano Pinto]

New submission from David Miguel Susano Pinto :

set union, intersection, difference methods accept any non-zero number of sets 
and return a new set instance, like so:

>>> a = set([1, 2])
>>> b = set([1, 3])
>>> c = set([3, 5])
>>> set.union(a, b, c)
{1, 2, 3, 5}

even if it's only one argument:

>>> set.union(a)
{1, 2}

I think it would be nice if zero arguments were not an error:

>>> set.union()
Traceback (most recent call last):
  File "", line 1, in 
TypeError: descriptor 'union' of 'set' object needs an argument

This would allow to handle any sequence of sets which otherwise requires this:

if len(sequence):
return set.union(*sequence)
else:
return set()

--
messages: 330601
nosy: carandraug
priority: normal
severity: normal
status: open
title: set union/intersection/difference could accept zero arguments
type: enhancement
versions: Python 3.7

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