me@medev:/var/lib/mongodb$ sudo apt-get install python-pymongo
[sudo] password for me:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  ttf-umefont wine1.4-i386 wine1.4-common wine1.4 libcapi20-3 firefox-globalmenu winetricks libmpg123-0 ttf-unfonts-core libopenvg1-mesa fonts-droid ttf-droid
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  python-bson python-gridfs
The following NEW packages will be installed:
  python-bson python-gridfs python-pymongo
0 upgraded, 3 newly installed, 0 to remove and 376 not upgraded.
Need to get 128 kB of archives.
After this operation, 650 kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
Get:1 http://ca.archive.ubuntu.com/ubuntu/ precise-updates/main python-bson i386 2.1-1ubuntu0.1 [34.7 kB]
Get:2 http://ca.archive.ubuntu.com/ubuntu/ precise-updates/main python-gridfs all 2.1-1ubuntu0.1 [10.6 kB]
Get:3 http://ca.archive.ubuntu.com/ubuntu/ precise-updates/main python-pymongo i386 2.1-1ubuntu0.1 [82.9 kB]
Fetched 128 kB in 0s (146 kB/s)
Selecting previously unselected package python-bson.
(Reading database ... 262638 files and directories currently installed.)
Unpacking python-bson (from .../python-bson_2.1-1ubuntu0.1_i386.deb) ...
Selecting previously unselected package python-gridfs.
Unpacking python-gridfs (from .../python-gridfs_2.1-1ubuntu0.1_all.deb) ...
Selecting previously unselected package python-pymongo.
Unpacking python-pymongo (from .../python-pymongo_2.1-1ubuntu0.1_i386.deb) ...
Setting up python-bson (2.1-1ubuntu0.1) ...
Setting up python-gridfs (2.1-1ubuntu0.1) ...
Setting up python-pymongo (2.1-1ubuntu0.1) ...


and then to test it...

me@medev:/var/lib/mongodb$ python
Python 2.7.8 (default, Nov  5 2014, 15:18:10)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pymongo
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named pymongo
>>>