Packages as seen through yolk or pip

Question

I need some help understanding how pip and yolk work

I ran pip install pymssql, which installed pymssql version 2.0.0b1-dev-20111019, but then decided that I'd like to revert to an older version.

I ran yolk -V pymssql to check which versions I have available, but it only returns pymssql 1.0.2. Shouldn't the version that I installed appear too?

Searching pypi through the website reveals that 1.0.2 is the only version available. Does this mean pip is using sources other than pypi?

Answer 1

yolk only search trough PyPI XMLRPC API as far as I know, while pip crawls the web looking for the "best" package that fits - the seed page is http://pypi.python.org/simple/<PACKAGE_NAME>.

Answer 2

Yeah, look at the pip.log file to see where it's searching for packages. I think yolk is just looking at what's registered on pypi, but pip is looking all over the place for the most up to date versions it can find.

Answer 3

i'm usually running pip with the -vv-flag (double-verbose, or very verbose)...
in htis case that produces:

$ pip install -v -v --no-install pymssql

Downloading/unpacking pymssql
  Getting page http://pypi.python.org/simple/pymssql
  URLs to search for versions for pymssql:
  * http://pypi.python.org/simple/pymssql/
  Getting page http://pymssql.sourceforge.net
  Getting page http://sourceforge.net/project/showfiles.php?group_id=40059&package_id=32202
  Getting page http://code.google.com/p/pymssql/
  Getting page http://code.google.com/p/pymssql/downloads/list
  Analyzing links from page http://pypi.python.org/simple/pymssql/
   [... snip ...]
  Found link http://pymssql.googlecode.com/files/pymssql-2.0.0b1-dev-20111019.tar.gz (from http://code.google.com/p/pymssql/), version: 2.0.0b1-dev-20111019
   [... snip ...]
  Using version 2.0.0b1-dev-20111019 (newest of versions: 2.0.0b1-dev-20111019, 2.0.0b1-dev-20111019, 1.0.2, 1.0.2, 1.0.1, 1.0.1, 1.0.0)
  Downloading pymssql-2.0.0b1-dev-20111019.tar.gz (5.0Mb): 
  Downloading from URL http://pymssql.googlecode.com/files/pymssql-2.0.0b1-dev-20111019.tar.gz (from http://code.google.com/p/pymssql/)
...Downloading pymssql-2.0.0b1-dev-20111019.tar.gz (5.0Mb): 5.0Mb downloaded
  Running setup.py egg_info for package pymssql
   [... snip ...]

this way you can clearly see where its downloading from.