pip installに失敗。（Mac OS High Sierraのターミナルの出力のコピー）プロンプトのホスト名、ユーザ名は省略しています。

pip_install_error_20180408.txt

study $ mkdir test_pip_install
study $ cd test_pip_install
test_pip_install $ python3 -V
Python 3.5.1
test_pip_install $ python3 -m venv env
test_pip_install $ ls
env
test_pip_install $ source env/bin/activate
(env) test_pip_install $ python -V
Python 3.5.1
(env) test_pip_install $ pip freeze
(env) test_pip_install $ pip freeze --all

Usage:   
  pip freeze [options]

no such option: --all
(env) test_pip_install $ pip --version
pip 7.1.2 from /Users//study/test_pip_install/env/lib/python3.5/site-packages (python 3.5)
(env) test_pip_install $ pip install numpy
Collecting numpy
  Could not find a version that satisfies the requirement numpy (from versions: )
No matching distribution found for numpy
(env) test_pip_install $ pip install -U pip
Requirement already up-to-date: pip in ./env/lib/python3.5/site-packages
(env) test_pip_install $ pip --version
pip 7.1.2 from /Users//study/test_pip_install/env/lib/python3.5/site-packages (python 3.5)
(env) test_pip_install $ pip install --upgrade pip
Requirement already up-to-date: pip in ./env/lib/python3.5/site-packages
(env) test_pip_install $ pip --version
pip 7.1.2 from /Users//study/test_pip_install/env/lib/python3.5/site-packages (python 3.5)
(env) test_pip_install $ python -m pip install -U pip
Requirement already up-to-date: pip in ./env/lib/python3.5/site-packages
(env) test_pip_install $ pip --version
pip 7.1.2 from /Users//study/test_pip_install/env/lib/python3.5/site-packages (python 3.5)
(env) test_pip_install $ deactivate 
test_pip_install $ which python3
/Library/Frameworks/Python.framework/Versions/3.5/bin/python3
test_pip_install $