pip使おうとするとSSL module is not available.になる件

##先に結論
#####1. pythonをinstallし直しましょう。

```
$pyenv install <使いたいpythonのversion>
```

#####2. pipをinstallし直しましょう。

```
$ curl -kL https://bootstrap.pypa.io/get-pip.py | python
```
##環境
macOS 10.14.6
pyenv
##経緯
久しぶりにmacでpython使う用事ができた。
どれ、必要なモジュールをpipで入れようかな？
##発生事態
一先ず、searchしたろかい、ポチッとな。

```
$ pip search blurblur
Exception:
Traceback (most recent call last):
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/_vendor/requests/adapters.py", line 423, in send
    timeout=timeout
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 583, in urlopen
    conn = self._get_conn(timeout=pool_timeout)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 257, in _get_conn
    return conn or self._new_conn()
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 808, in _new_conn
    raise SSLError("Can't connect to HTTPS URL because the SSL "
pip._vendor.requests.packages.urllib3.exceptions.SSLError: Can't connect to HTTPS URL because the SSL module is not available.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/commands/search.py", line 45, in run
    pypi_hits = self.search(query, options)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/commands/search.py", line 62, in search
    hits = pypi.search({'name': query, 'summary': query}, 'or')
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/xmlrpc/client.py", line 1112, in __call__
    return self.__send(self.__name, args)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/xmlrpc/client.py", line 1452, in __request
    verbose=self.__verbose
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/download.py", line 775, in request
    headers=headers, stream=True)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/_vendor/requests/sessions.py", line 522, in post
    return self.request('POST', url, data=data, json=json, **kwargs)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/download.py", line 386, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/_vendor/requests/sessions.py", line 475, in request
    resp = self.send(prep, **send_kwargs)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/_vendor/requests/sessions.py", line 596, in send
    r = adapter.send(request, **kwargs)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/_vendor/cachecontrol/adapter.py", line 47, in send
    resp = super(CacheControlAdapter, self).send(request, **kw)
  File "/Users/someone/.pyenv/versions/3.6.1/lib/python3.6/site-packages/pip/_vendor/requests/adapters.py", line 497, in send
    raise SSLError(e, request=request)
pip._vendor.requests.exceptions.SSLError: Can't connect to HTTPS URL because the SSL module is not available.
```

オウフ...
##試行錯誤
とりあえずは、先生に訊きます。常識です。
https://qiita.com/akashixi/items/14d05ddf0a3d1176956c
https://www.unknownengineer.net/entry/2018/06/20/191011
https://www.secat-blog.net/wordpress/python3-cannot-install-numpy-by-pip-fix/
みんな、python3.8.0を入れたり、openSSLを更新したりしてますね。

真似して、3.8.0を入れてpipしてみたらSSLErrorは吐かず。
でも、3.6.1にすると相変わらずのSSLError。
opensslを更新して、デフォから切り替えたりもしました。

```
$brew install openssl
$echo 'export PATH="/usr/local/opt/openssl@1.1/bin:$PATH"' >> ~/.bash_profile
```
それでもSSLErrorは治らず。

##解決
pythonをinstallし直します。

```
$ pyenv install 3.6.1
```
pipもインストールし直します。

```
$ curl -kL https://bootstrap.pypa.io/get-pip.py | python
```
で、pipを使ってみると...

```
$ pip search blur
blur (0.4)                         - A chance art toolkit.
blur-clip-board-image-cli (0.0.4)  - Blur clip board image command line tool for macOS
pyblur (0.2.3)                     - Image blurring routines
WallaBlur (1.0.1)                  - blur background on window opening
pillow-stackblur (0.0.2)           - The Pillow filter for Stack Blur.
blurit (0.0.12)                    - This package is aimed to build to blur different portions of a image. Currently it blurs eyes in human photograph.
BlurWal (1.1.1)                    - Smoothly blurs the wallpaper when windows are opened.
pysaber (0.1.5)                    - Python package that implements a systems approach to blur estimation and reduction (SABER)
azureblur (0.1)                    - The triple box blur implementation from Firefox&#8217;s moz2d/Azure, with Python bindings.
imgic (0.2.8)                      - A basic numpy-based image manipulation package. Contains tools for resizing, cropping, blurring, and others.
Products.ImageEditor (3.0.0)       - adds a "Image Editor" link near the image widget  allowing the user to rotate, flip, blur, compress, change contrast & brightness, sharpen, add drop shadows, crop, resize
                                     an image, save as, and apply sepia.
```
やったぜ。