Hi,
First list the pacman package database and search for python package (if it is allready installed):
pacman -Q | grep python
If you have it installed it would be listed as python (ver 3) or python2 (ver 2.x)
Also your / seems to be almost full:
Quoteerror: Partition / too full: 22884 blocks needed, 9990 blocks free
What is the size of the uSD card you are using?
Post here the output of
df -h
You may try to extend the root partition in order to use the unallocated space on SD card. Once you have enough free space on / you can install python2 package. Check this thread:
http://archlinuxarm.org/forum/viewtopic.php?f=31&t=3119 (http://archlinuxarm.org/forum/viewtopic.php?f=31&t=3119)