[Numpy-discussion] setting package path

[Pearu Peterson]

On Wed, 1 Mar 2006, Stefan van der Walt wrote:

> In numpytest.py, set_package_path is provided for handling path
> changes while doing unit tests.  It reads
>
> def set_package_path(level=1):
>    """ Prepend package directory to sys.path.
>
>    set_package_path should be called from a test_file.py that
>    satisfies the following tree structure:
>
>      <somepath>/<somedir>/test_file.py
>
>    Then the first existing path name from the following list
>
>      <somepath>/build/lib.<platform>-<version>
>      <somepath>/..
>
>    is prepended to sys.path.
> ...
>
> However, the line that supposedly calculates "somepath/.." is
>
> d = os.path.dirname(os.path.dirname(os.path.abspath(testfile)))
>
>
> which calculates "somepath".  Which is wrong: the docstring, the code
> or my interpretation?

You have to read also following code:

     d1 = os.path.join(d,'build','lib.%s-%s'%(get_platform(),sys.version[:3]))
     if not os.path.isdir(d1):
         d1 = os.path.dirname(d)  # <- here we get "somepath/.."
     sys.path.insert(0,d1)


Pearu