日常python小命令

pip：

其中比较常见的：安装指定版本的软件

1 pip install  package==version

如上pip  安装python软件包，如果你在网上下载的gz包的开源安装包，安装方法如下：以django为例子：

    tar xzvf Django-*.tar.gz 。

    cd Django-* 。

    sudo python setup.py install 。

 

如何查看一个软件的源码呢？

比如查看ansible的源码：

1 >>> import ansible
2 >>> ansible.__file__
3 '/usr/lib/python2.6/site-packages/ansible/__init__.pyc'

 

然后到目录：cd /usr/lib/python2.6/site-packages/ansible 查看相应的类中的__init__py既可。

 1 [root@MiWiFi-R1CM-srv venv]# cd /usr/lib/python2.6/site-packages/ansible
 2 [root@MiWiFi-R1CM-srv ansible]# pwd
 3 /usr/lib/python2.6/site-packages/ansible
 4 [root@MiWiFi-R1CM-srv ansible]# ls
 5 cli     config        constants.pyc  executor  __init__.py   inventory  module_utils  playbook  release.py   template  vars
 6 compat  constants.py  errors         galaxy    __init__.pyc  modules    parsing       plugins   release.pyc  utils
 7 [root@MiWiFi-R1CM-srv ansible]# cd playbook/
 8 [root@MiWiFi-R1CM-srv playbook]# ls 
 9 attribute.py   block.py         handler_task_include.py   __init__.py           play_context.py   role_include.pyc  task.pyc
10 attribute.pyc  block.pyc        handler_task_include.pyc  __init__.pyc          play_context.pyc  taggable.py       vars_file.py
11 base.py        conditional.py   helpers.py                loop_control.py       play.py           taggable.pyc      vars_file.pyc
12 base.pyc       conditional.pyc  helpers.pyc               loop_control.pyc      play.pyc          task_include.py   vars.py
13 become.py      handler.py       included_file.py          playbook_include.py   role              task_include.pyc  vars.pyc
14 become.pyc     handler.pyc      included_file.pyc         playbook_include.pyc  role_include.py   task.py
15 [root@MiWiFi-R1CM-srv playbook]# cat __init__.py

或者直接安装ipython 来查看：

如何将python注册到window注册表中，如下是python3运行版本：

 1 import sys
 2   
 3 from winreg import *
 4 
 5 # tweak as necessary
 6 version = sys.version[:3]
 7 installpath = sys.prefix
 8 
 9 regpath = "SOFTWARE\\Python\\Pythoncore\\%s\\" % (version)
10 installkey = "InstallPath"
11 pythonkey = "PythonPath"
12 pythonpath = "%s;%s\\Lib\\;%s\\DLLs\\" % (
13     installpath, installpath, installpath
14 )
15   
16 def RegisterPy():
17     try:
18         reg = OpenKey(HKEY_CURRENT_USER, regpath)
19     except EnvironmentError as e:
20         try:
21             reg = CreateKey(HKEY_CURRENT_USER, regpath)
22             SetValue(reg, installkey, REG_SZ, installpath)
23             SetValue(reg, pythonkey, REG_SZ, pythonpath)
24             CloseKey(reg)
25         except:
26             print("*** Unable to register!")
27             return
28         print("--- Python", version, "is now registered!")
29         return
30     if (QueryValue(reg, installkey) == installpath and
31         QueryValue(reg, pythonkey) == pythonpath):
32         CloseKey(reg)
33         print("=== Python", version, "is already registered!")
34         return
35     CloseKey(reg)
36     print("*** Unable to register!")
37     print("*** You probably have another Python installation!")
38   
39 if __name__ == "__main__":
40     RegisterPy()

在安装pyiwin32的时候就不会python3.5未安装。

 python 在线查找内置模块和库地址：

python3：

1 https://docs.python.org/3/library/index.html

 

 python2

1 https://docs.python.org/2/library/index.html

 

posted @ 2016-11-05 15:58  evil_liu  阅读(156)  评论(0)    收藏  举报