pkg/49694: py27-pip and py34-pip (and probably others) can't coexist

[riz%NetBSD.org@localhost]

>Number:         49694
>Category:       pkg
>Synopsis:       Can't have "pip" packages for python 2.7 and 3.4 installed at the same time
>Confidential:   no
>Severity:       non-critical
>Priority:       high
>Responsible:    pkg-manager
>State:          open
>Class:          support
>Submitter-Id:   net
>Arrival-Date:   Tue Feb 24 22:35:00 +0000 2015
>Originator:     riz%NetBSD.org@localhost
>Release:        NetBSD 7.0_BETA
>Organization:
>Environment:
System: NetBSD xs2.lan 7.0 NetBSD 7.0 (GENERIC) #0: Sat Feb 14 11:49:54 PST 2015 riz%xs2.lan@localhost:/tmp/amd64/obj/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
	While I can install python2.7 and python3.4 packages at the same
	time, when I try to install "pip" packages, they conflict:

---Feb 24 14:00:35: installing py34-pip-1.5.6...
pkg_add: Conflicting PLIST with py27-pip-1.5.6: bin/pip
pkg_add: 1 package addition failed
>How-To-Repeat:
	Install python27-2.7.9 and python34-3.4.2 at the same time, then install
py27-pip, then try to install py34-pip.
>Fix:
	None given; it probably involves not installing "pip" for either of them, and
relying on whatever selection method to make one the default (pip2.7 vs pip3.4)