On 9 August 2014 17:02, Donald Stufft <
donald@stufft.io> wrote:
To be clear, the direct reference is mostly for use in the install_requires.
On the CLI pip can still just take a path to a file or whatever. This feature
is intended to replace dependency_links in a way that people can use
them for private packages but that they won't be allowed on PyPI or the
like.
Understood. I'd still like an explicit pointer to the canonical URL
details tools should (or must?) use. See
http://en.wikipedia.org/wiki/File_URI_scheme (specifically the
"Windows" sections) for why I'm bothered - specifically the quote
"Here are *some* examples which *may* be accepted by some
applications" (emphasis mine).
I'd be more than happy if the spec was just "tools will use XXX from
the Python standard library. But note (the first 4 are the supposedly
acceptable URLs from that Wikipedia article):
py
Python 3.4.0 (v3.4.0:04f714765c13, Mar 16 2014, 19:25:23) [MSC v.1600
64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
from urllib.request import url2pathname
url2pathname("file://localhost/c|/WINDOWS/clock.avi")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Apps\Python34\lib\nturl2path.py", line 26, in url2pathname
raise OSError(error)
OSError: Bad URL: file|//localhost/c|/WINDOWS/clock.avi
url2pathname("file:///c|/WINDOWS/clock.avi")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Apps\Python34\lib\nturl2path.py", line 26, in url2pathname
raise OSError(error)
OSError: Bad URL: file|///c|/WINDOWS/clock.avi
url2pathname("file://localhost/c:/WINDOWS/clock.avi")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Apps\Python34\lib\nturl2path.py", line 26, in url2pathname
raise OSError(error)
OSError: Bad URL: file|//localhost/c|/WINDOWS/clock.avi
url2pathname("file:///c:/WINDOWS/clock.avi")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Apps\Python34\lib\nturl2path.py", line 26, in url2pathname
raise OSError(error)
OSError: Bad URL: file|///c|/WINDOWS/clock.avi
url2pathname("file:////WINDOWS/clock.avi")
'E:
\\WINDOWS\\clock.avi'url2pathname("file:///WINDOWS/clock.avi")
'E:
\\WINDOWS\\clock.avi'url2pathname("file://WINDOWS/clock.avi")
'E:
\\WINDOWS\\clock.avi'url2pathname("file:/WINDOWS/clock.avi")
'E:
\\WINDOWS\\clock.avi'
I have no idea where Python got that E drive from - my current drive is C:.
At this point in time, I have no idea how to correctly write a file
URL for the file C:\Windows\clock.avi on my PC. While it's very
definitely a corner case in the PEP, and it's clearly not the PEP's
responsibility to explain the file URL spec, I do think it's relevant
to the usability of the PEP.
Paul