Python pipを使ったpymysqlモジュールのインストール (Error: ImportError: No module named pymysql)

1. ルート権限の使用

2. pipが利用可能かどうかを確認する（直接pipと入力して確認する）次のように、pipが利用可能であることを示す。

[root@iZ23kick03xZ python_db]# pip

Usage:
  pip <command> [options]

Commands:
  install Install packages.
  download Download packages.
  uninstall Uninstall packages.
  freeze Output installed packages in requirements format.
  list List installed packages.
  show Show information about installed packages.
  search Search Search PyPI for packages.
  wheel Build wheels from your requirements.
  hash Compute hashes of package archives.
  completion A helper command used for command completion
  help Show help for commands.

3. pymysqlのインストール 以下のようにpip install pymysqlというコマンドを使用します。

[root@iZ23kick03xZ python_db]# pip install pymysql
Collecting pymysql
  Downloading https://files.pythonhosted.org/packages/a7/7d/682c4a7da195a678047c8f1c51bb7682aaedee1dca7547883c3993ca9282/PyMySQL-0.9. 2-py2.py3-none-any.whl (47kB)
    100% |████████████████████████████████| 51kB 147kB/s
Collecting cryptography (from pymysql)
  Downloading https://files.pythonhosted.org/packages/87/e6/915a482dbfef98bbdce6be1e31825f591fc67038d4ee09864c1d2c3db371/cryptography -2.3.1-cp27-cp27mu-manylinux1_x86_64.whl (2.1MB)
    100% |████████████████████████████████| 2.1MB 169kB/s
Collecting enum34; python_version < "3" (from cryptography->pymysql)
  Downloading https://files.pythonhosted.org/packages/c5/db/e56e6b4bbac7c4a06de1c50de6fe1ef3810018ae11732a50f15f62c7d050/enum34-1.1.6 -py2-none-any.whl
Collecting asn1crypto>=0.21.0 (from cryptography->pymysql)
  Downloading https://files.pythonhosted.org/packages/ea/cd/35485615f45f30a510576f1a56d1e0a7ad7bd8ab5ed7cdc600ef7cd06222/asn1crypto- 0.24.0-py2.py3-none-any.whl (101kB)
    100% |████████████████████████████████| 102kB 294kB/s
Collecting cffi!=1.11.3,>=1.7 (from cryptography->pymysql)
  Downloading https://files.pythonhosted.org/packages/14/dd/3e7a1e1280e7d767bd3fa15791759c91ec19058ebe31217fe66f3e9a8c49/cffi-1.11.5- cp27-cp27mu-manylinux1_x86_64.whl (407kB)
    100% |████████████████████████████████| 409kB 257kB/s
Collecting idna>=2.1 (from cryptography->pymysql)
  Downloading https://files.pythonhosted.org/packages/4b/2a/0276479a4b3caeb8a8c1af2f8e4355746a97fab05a372e4a2c6a6b876165/idna-2.7-py2 .py3-none-any.whl (58kB)
    100% |████████████████████████████████| 61kB 345kB/s
Requirement already satisfied (use --upgrade to upgrade): six>=1.4.1 in /usr/lib/python2.7/site-packages (from cryptography->pymysql)
Collecting ipaddress; python_version < "3" (from cryptography->pymysql)
  Downloading https://files.pythonhosted.org/packages/fc/d0/7fc3a811e011d4b388be48a0e381db8d990042df54aa4ef4599a31d39853/ipaddress- 1.0.22-py2.py3-none-any.whl
Collecting pycparser (from cffi!=1.11.3,>=1.7->cryptography->pymysql)
  Downloading https://files.pythonhosted.org/packages/68/9e/49196946aee219aead1290e00d1e7fdeab8567783e83e1b9ab5585e6206a/pycparser- 2.19.tar.gz (158kB)
    100% |████████████████████████████████| 163kB 187kB/s
Installing collected packages: enum34, asn1crypto, pycparser, cffi, idna, ipaddress, cryptography, pymysql
  Running setup.py install for pycparser ... done
Successfully installed asn1crypto-0.24.0 cffi-1.11.5 cryptography-2.3.1 enum34-1.1.6 idna-2.7 ipaddress-1.0.22 pycpa
Cookie cffi jinja2 selinux
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モジュールpymysqlがすでに利用可能であることがわかります import pymysqlは持ってくればすぐに使えるようになります。