centos6.5更新python2.7影響pip和easy_install

• 一般更新python的時候只知道會影響yum，但沒注意會影響pip和easy_install，需要卸載安裝

  
  

1. 安裝依賴環境

   1. yum install zlib-devel zlib openssl openssl-devel readline-devel (zlib安裝setuptools的時候會用到，沒有的會報“RuntimeError: Compression requires the (missing) zlib module”；openssl是pip會用到，沒有會報ImportError: cannot import name HTTPSHandle，如果不提前安裝會來回重新編譯安裝python，很浪費時間)

2. 安裝python

   1. wget https://www.python.org/ftp/python/2.7.8/Python-2.7.8.tar.xz

   2. tar -xvf Python-2.7.8.tar.xz

   3. cd Python-2.7.8 && ./configure && make && make install

   4. mv /usr/bin/python /usr/bin/python_old

   5. ln -s /usr/local/bin/python2.7 /usr/bin/python

3. 修改yum

   1. vim /usr/bin/yum（把第一行的語言環境改成python_old）

4. 安裝pip

   1. wget https://pypi.python.org/packages/source/p/pip/pip-7.1.2.tar.gz#md5=3823d2343d9f3aaab21cf9c917710196

   2. tar xf pip-7.1.2.tar.gz && cd pip-7.1.2 && python setup.py install

   3. pip install --upgrade pip

   4. pip -V

5. 安裝easy_install

   1. wget https://pypi.python.org/packages/source/s/setuptools/setuptools-18.2.tar.gz#md5=52b4e48939ef311d7204f8fe940764f4

   2. tar fxz setuptools-18.2.tar.gz && cd setuptools-18.2 && python setup.py install