Shulou(Shulou.com)06/03 Report--

In this issue, Xiaobian will bring you an example analysis of the functions of the os library in python. The article is rich in content and analyzed and described from a professional perspective. After reading this article, I hope you can gain something.

OS libraries provide common, basic operating system interaction functions.

-OS library is Python standard library containing hundreds of functions

- Common path operations, process management, environmental parameters and other categories

- Path operation: os.path sub-library, processing file path and information

- Process management: Start other programs in the system

- Environmental parameters: obtain system software and hardware information and other environmental parameters

os.path sub-library takes path as the entry and is used to operate and process file paths.

import os.path

import os.path as op

os.path.abspath(path) #Returns the absolute path of path in the current system

os.path.normpath(path) #Normalized path representation, uniformly separated by\\path

os.path.relpath(path) #Returns the relative path between the current program and file

os.path.dirname(path) #Returns the directory name in path

os.path.basename(path) #Returns the last filename in the path

os.path.join(path, *paths) #Combines path and paths, returns a path string

os.path.exists(path) #Determine whether the file or directory corresponding to path exists, return True or False

os.path.isfile(path)

os.path.isdir(path)

os.path.getatime(path) #Returns the last access time of the file or directory corresponding to path

os.path.getmtime(path) #Returns the last modification time of the file or directory corresponding to path

os.path.getctime(path) #Returns the last modification time of the file or directory corresponding to path

os.path.getsize(path) #Returns the size of the file corresponding to path, in bytes

Python OS Library Process Management

Calling an external program using the current python program

os.system(command)

Execute command in the operating system

Returns the return value of the command program after execution

import os#os.system(command)os.system("C:\\Windows\\System32\\calc.exe")os.system("C:\\Windows\\System32\\mspaint.exe" \ D:\\PYECourse\\grwordcloud.png)

Python gets or changes system environment information

os.chdir(path) #Modify the path of the current program

os.getcwd() #Returns the current path of the program

os.getlogin() #Get the current system login user name

os.cpu_count() #Get the number of CPUs in the current system

The above is a small series for everyone to share the Python OS library function example analysis, if there is a similar doubt, may wish to refer to the above analysis to understand. If you want to know more about it, please pay attention to the industry information channel.

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