#安装python2.7版本

tar xvf Python-2.7.9.tar.xzcd Python-2.7.9./configure --prefix=/usr/bin/python2.7makemake installmv /usr/bin/python /usr/bin/python.bakln -s /usr/bin/python2.7/bin/python2.7 /usr/bin/python

问题1：yum安装报错

No module named yum

解决：

前面安装了python2.7，默认2.6。python 版本更改后，/usr/bin/yum 文件需要更新 首行改为 #!/usr/bin/python2.6

问题2：pip command not found

[root@ Python-2.7.9]# pip install jinja2-bash: pip: command not found

解决

[root@ ~]#  yum -y install python-setuptools[root@ ~]#  easy_install pip

问题3：ImportError: No module named pkg_resources

[root@ ~]# easy_install pipTraceback (most recent call last):  File "/usr/bin/easy_install", line 5, in 
    
         from pkg_resources import load_entry_pointImportError: No module named pkg_resources
    

解决：

[root@ ~]# curl | python

问题4：easy_install pip 报错 The ‘distribute==0.6.10‘ distribution was not found

[root@ ~]# easy_install pipTraceback (most recent call last):  File "/usr/bin/easy_install", line 5, in 
    
         from pkg_resources import load_entry_point  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 3019, in 
     
        File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 3003, in _call_aside  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 3032, in _initialize_master_working_set  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 655, in _build_master  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 963, in require  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 849, in resolvepkg_resources.DistributionNotFound: The ‘distribute==0.6.10‘ distribution was not found and is required by the application
     
    

解决：安装distribute

wget http://pypi.python.org/packages/source/d/distribute/distribute-0.6.10.tar.gz --no-check-certificatetar zxvf distribute-0.6.10.tar.gzcd distribute-0.6.10python setup.py install[root@ ~]# easy_install pip 成功wKiom1mhiBnQpyAOAAEBSCmCOfA625.png

问题5：上图显示安装pip成功，但执行命令依然显示 command not found

[root@ ~]# pip install jinja2-bash: pip: command not found排查：[root@ ~]# which pip[root@~]# ls /usr/bin/pipls: 无法访问/usr/bin/pip: 没有那个文件或目录

解决：创建软连接：

[root@localhost ~]# ln -s /usr/bin/python2.7/bin/pip /usr/bin/pip

安装成功

[root@~]# pip install jinja2Collecting jinja2  Downloading Jinja2-2.9.6-py2.py3-none-any.whl (340kB)    100% |████████████████████████████████| 348kB 28kB/s Collecting MarkupSafe>=0.23 (from jinja2)  Downloading MarkupSafe-1.0.tar.gzInstalling collected packages: MarkupSafe, jinja2  Running setup.py install for MarkupSafe ... doneSuccessfully installed MarkupSafe-1.0 jinja2-2.9.6

问题6：pip认证失败，报错“There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed”

[root@localhost Python-2.7.13]# pip install xlsxwriterCollecting xlsxwriter  Could not fetch URL https://pypi.python.org/simple/xlsxwriter/: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661) - skipping  Could not find a version that satisfies the requirement xlsxwriter (from versions: )No matching distribution found for xlsxwriterYou are using pip version 9.0.1, however version 9.0.3 is available.You should consider upgrading via the 'pip install --upgrade pip' command.

解决：写一个pip配置文件~/.pip/pip.conf，在配置文件中加入trusted-host=pypi.python.org

[global]timeout = 6000#index-url = http://e.pypi.python.org/simpleindex-url = https://pypi.python.org/simple/[install]use-mirrors = true#mirrors = http://e.pypi.python.orgmirrors = https://pypi.python.orgtrusted-host=pypi.python.org