sudo apt-get install python3-pip

➜  ~ sudo apt-get install python3-pip 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libpython3-dev libpython3.5-dev python3-dev python3-setuptools python3-wheel python3.5-dev
Suggested packages:
  python-setuptools-doc
The following NEW packages will be installed:
  libpython3-dev libpython3.5-dev python3-dev python3-pip python3-setuptools python3-wheel python3.5-dev
0 upgraded, 7 newly installed, 0 to remove and 0 not upgraded.
Need to get 38.0 MB of archives.
After this operation, 55.2 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libpython3.5-dev amd64 3.5.2-2ubuntu0~16.04.3 [37.3 MB]
Get:2 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 libpython3-dev amd64 3.5.1-3 [6,926 B]                                                                                           
Get:3 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 python3.5-dev amd64 3.5.2-2ubuntu0~16.04.3 [413 kB]                                                                      
Get:4 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 python3-dev amd64 3.5.1-3 [1,186 B]                                                                                              
Get:5 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 python3-pip all 8.1.1-2ubuntu0.4 [109 kB]                                                                            
Get:6 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 python3-setuptools all 20.7.0-1 [88.0 kB]                                                                                        
Get:7 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 python3-wheel all 0.29.0-1 [48.1 kB]                                                                                         
Fetched 38.0 MB in 9s (3,819 kB/s)                                                                                                                                                           
Selecting previously unselected package libpython3.5-dev:amd64.
(Reading database ... 154463 files and directories currently installed.)
Preparing to unpack .../libpython3.5-dev_3.5.2-2ubuntu0~16.04.3_amd64.deb ...
Unpacking libpython3.5-dev:amd64 (3.5.2-2ubuntu0~16.04.3) ...
Selecting previously unselected package libpython3-dev:amd64.
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Unpacking libpython3-dev:amd64 (3.5.1-3) ...
Selecting previously unselected package python3.5-dev.
Preparing to unpack .../python3.5-dev_3.5.2-2ubuntu0~16.04.3_amd64.deb ...
Unpacking python3.5-dev (3.5.2-2ubuntu0~16.04.3) ...
Selecting previously unselected package python3-dev.
Preparing to unpack .../python3-dev_3.5.1-3_amd64.deb ...
Unpacking python3-dev (3.5.1-3) ...
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Preparing to unpack .../python3-pip_8.1.1-2ubuntu0.4_all.deb ...
Unpacking python3-pip (8.1.1-2ubuntu0.4) ...
Selecting previously unselected package python3-setuptools.
Preparing to unpack .../python3-setuptools_20.7.0-1_all.deb ...
Unpacking python3-setuptools (20.7.0-1) ...
Selecting previously unselected package python3-wheel.
Preparing to unpack .../python3-wheel_0.29.0-1_all.deb ...
Unpacking python3-wheel (0.29.0-1) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up libpython3.5-dev:amd64 (3.5.2-2ubuntu0~16.04.3) ...
Setting up libpython3-dev:amd64 (3.5.1-3) ...
Setting up python3.5-dev (3.5.2-2ubuntu0~16.04.3) ...
Setting up python3-dev (3.5.1-3) ...
Setting up python3-pip (8.1.1-2ubuntu0.4) ...
Setting up python3-setuptools (20.7.0-1) ...
Setting up python3-wheel (0.29.0-1) ...