ubuntu 安裝 tensorflow 提示pip版本不對

1 本人在ubuntu16.04LTS， python版本2.7&3.5.2，上用pip安裝tensorflow，結(jié)果提示pip太舊了，我更新了pip也沒用，以下是報(bào)錯(cuò)信息

yc_qian@QYC:~$ sudo -H pip install tensorflow --upgrade
Requirement already up-to-date: tensorflow in /usr/local/lib/python2.7/dist-packages
Requirement already up-to-date: astor>=0.6.0 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: protobuf>=3.4.0 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: gast>=0.2.0 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: tensorboard<1.9.0,>=1.8.0 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: six>=1.10.0 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: wheel in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: absl-py>=0.1.6 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: backports.weakref>=1.0rc1 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: termcolor>=1.1.0 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: enum34>=1.1.6 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: numpy>=1.13.3 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: grpcio>=1.8.6 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: mock>=2.0.0 in /usr/local/lib/python2.7/dist-packages (from tensorflow)
Requirement already up-to-date: setuptools in /usr/local/lib/python2.7/dist-packages (from protobuf>=3.4.0->tensorflow)
Requirement already up-to-date: werkzeug>=0.11.10 in /usr/local/lib/python2.7/dist-packages (from tensorboard<1.9.0,>=1.8.0->tensorflow)
Requirement already up-to-date: futures>=3.1.1; python_version < "3" in /usr/local/lib/python2.7/dist-packages (from tensorboard<1.9.0,>=1.8.0->tensorflow)
Requirement already up-to-date: markdown>=2.6.8 in /usr/local/lib/python2.7/dist-packages (from tensorboard<1.9.0,>=1.8.0->tensorflow)
Requirement already up-to-date: html5lib==0.9999999 in /usr/local/lib/python2.7/dist-packages (from tensorboard<1.9.0,>=1.8.0->tensorflow)
Requirement already up-to-date: bleach==1.5.0 in /usr/local/lib/python2.7/dist-packages (from tensorboard<1.9.0,>=1.8.0->tensorflow)
Requirement already up-to-date: pbr>=0.11 in /usr/local/lib/python2.7/dist-packages (from mock>=2.0.0->tensorflow)
Requirement already up-to-date: funcsigs>=1; python_version < "3.3" in /usr/local/lib/python2.7/dist-packages (from mock>=2.0.0->tensorflow)
You are using pip version 8.1.1, however version 10.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

我查看了一下pip的版本：
yc_qian@QYC:~$ pip -V
pip 10.0.1 from /home/yc_qian/.local/lib/python3.5/site-packages/pip (python 3.5)

保險(xiǎn)起見，又看了pip3的版本：
yc_qian@QYC:~$ pip3 -V
pip 10.0.1 from /home/yc_qian/.local/lib/python3.5/site-packages/pip (python 3.5)

明明pip版本都是10.0.1了，為什么安裝tensorflow還會(huì)失??？請問我該怎么辦？