sudo apt-get install python3
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  dh-python python3-minimal python3.4 python3.4-minimal
Suggested packages:
  python3-doc python3-tk python3.4-venv python3.4-doc
The following NEW packages will be installed:
  dh-python python3 python3-minimal python3.4 python3.4-minimal
0 upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/1484 kB of archives.
After this operation, 4767 kB of additional disk space will be used.
Do you want to continue? [Y/n] 
Selecting previously unselected package python3.4-minimal.
(Reading database ... 644265 files and directories currently installed.)
Preparing to unpack .../python3.4-minimal_3.4.3-1ubuntu1~14.04.3_amd64.deb ...
Unpacking python3.4-minimal (3.4.3-1ubuntu1~14.04.3) ...
Selecting previously unselected package python3.4.
Preparing to unpack .../python3.4_3.4.3-1ubuntu1~14.04.3_amd64.deb ...
Unpacking python3.4 (3.4.3-1ubuntu1~14.04.3) ...
Selecting previously unselected package python3-minimal.
Preparing to unpack .../python3-minimal_3.4.0-0ubuntu2_amd64.deb ...
Unpacking python3-minimal (3.4.0-0ubuntu2) ...
Selecting previously unselected package python3.
Preparing to unpack .../python3_3.4.0-0ubuntu2_amd64.deb ...
Unpacking python3 (3.4.0-0ubuntu2) ...
Selecting previously unselected package dh-python.
Preparing to unpack .../dh-python_1.20140128-1ubuntu8.2_all.deb ...
Unpacking dh-python (1.20140128-1ubuntu8.2) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Processing triggers for mime-support (3.54ubuntu1.1) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu1) ...
Processing triggers for bamfdaemon (0.5.1+14.04.20140409-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Setting up python3.4-minimal (3.4.3-1ubuntu1~14.04.3) ...
Setting up python3.4 (3.4.3-1ubuntu1~14.04.3) ...
Setting up python3-minimal (3.4.0-0ubuntu2) ...
<encodings.ascii.IncrementalDecoder object at 0x7fe76427fac8>
<encodings.ascii.IncrementalDecoder object at 0x7fe76427fac8>
<encodings.ascii.IncrementalDecoder object at 0x7fd4487860f0>
<encodings.ascii.IncrementalDecoder object at 0x7fd4487860f0>
Setting up python3 (3.4.0-0ubuntu2) ...
running python rtupdate hooks for python3.4...
<encodings.ascii.IncrementalDecoder object at 0x7f9590fa4978>
<encodings.ascii.IncrementalDecoder object at 0x7f9590fa4978>
<encodings.ascii.IncrementalDecoder object at 0x7fcbda397f28>
<encodings.ascii.IncrementalDecoder object at 0x7fcbda397f28>
<encodings.ascii.IncrementalDecoder object at 0x7f82406520f0>
<encodings.ascii.IncrementalDecoder object at 0x7f82406520f0>
running python post-rtupdate hooks for python3.4...
<encodings.ascii.IncrementalDecoder object at 0x7ff66e7cfef0>
<encodings.ascii.IncrementalDecoder object at 0x7ff66e7cfef0>
<encodings.ascii.IncrementalDecoder object at 0x7f11ab0ab0f0>
Setting up dh-python (1.20140128-1ubuntu8.2) ...
<encodings.ascii.IncrementalDecoder object at 0x7f1d8599df28>
<encodings.ascii.IncrementalDecoder object at 0x7f1d8599df28>
<encodings.ascii.IncrementalDecoder object at 0x7f941d8910f0>