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I am writing a script to clean up my desktop, moving files based on file type. The first step, it would seem, is to ls -1 /Users/user/Desktop (I'm on Mac OSX). So, using Python, how would I run a command, then write the output to a file in a specific directory? Since this will be undocumented, and I'll be the only user, I don't mind (prefer?) if it uses os.system().
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Redirect Output to a File Only To redirect the output of a command to a file, type the command, specify the > or the >> operator, and then provide the path to a file you want to the output redirected to. For example, the ls command lists the files and folders in the current directory.
To do that, press the “File” button in the menu bar and click “Save output as … “ This will open a window dialog where you can save the terminal output. From there, you can pick where you want to save the file.
In Linux, for redirecting output to a file, utilize the ”>” and ”>>” redirection operators or the top command. Redirection allows you to save or redirect the output of a command in another file on your system. You can use it to save the outputs and use them later for different purposes.
You can redirect standard output to any file using > in command.
$ ls /Users/user/Desktop > out.txt
Using python,
os.system('ls /Users/user/Desktop > out.txt')
However, if you are using python then instead of using ls command you can use os.listdir to list all the files in the directory.
path = '/Users/user/Desktop'
files = os.listdir(path)
print files
After skimming the python documentation to run shell command and obtain the output you can use the subprocess module with the check_output method.
After that you can simple write that output to a file with the standard Python IO functions: File IO in python.
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