How do you use os? What even is os?

How do you use os?
From the 100 days of code iirc they only use

import os
#However, there is an alternative
from replit import clear
clear() # no need to define clear
#side note this is slow for me lol.

#there is another alternative to make your life easier:
from os import system as sys
def clear():

The os module in Python provides a way of using operating system dependent functionality like reading or writing to the file system, creating and deleting files or directories, etc.

Here is an example of how to use the os module to get the current working directory:

import os

current_directory = os.getcwd()

print("Current Directory:", current_directory)

Here is another example of how to use the os module to list all the files in a directory:

import os

directory = os.fsencode("path/to/directory")

for file in os.listdir(directory):

filename = os.fsdecode(file)


The write function in the os library is used to write a string to a file. It takes a string as its argument and writes it to the file specified in the file object. Here’s an example:

with open("file.txt", "w") as f:

f.write("Hello, world!")

This code opens a file called “file.txt” in write mode and writes the string “Hello, world!” to it.

The stdout function in the sys library refers to the standard output stream, which is usually the console. It is used to redirect output from print() to a file or another stream.

Finally, the flush function in the os library is used to flush the write buffers of a file. This forces any unwritten data to be written to the file. This function is useful when you want to ensure that all data has been written to a file before closing it. For example:

with open("file.txt", "w") as f:

f.write("Hello, world!")


This code writes “Hello, world!” to the file and then flushes the write buffer to ensure that everything has been written.

If you are seeing this
yh you probably learnt smth new, thank yu! uwu!

If you still do not understand how os works, you should probably go watch a youtube video that talks about os in detail. these are just examples of how the os lib can be used.

I use os when I making my new programming language:

import os

with open("main.txt") as f:
    # ...

os.system("g++ -o main && ./main")

Here system() compiles my file and executables it.

1 Like

I absolutely love os. Yes, most people use it for the one os.system("clear") functionality, but there is a bunch more stuff that is extremely helpful as well.

Checking if a path exists.

def path_exists(path):
    import os
    return os.path.exists(path)

os.listdir() returns every path in a directory in a nice list.

You can check if paths are directories or files.

import os

def is_file(path):
    return os.path.isfile(path)

def is_dir(path):
    return os.path.isdir(path)

And, it can check your native OS, which can be used to improve the clear statement from above:

import os

os.system("cls" if == "nt" else "clear")
# I might have wrote that wrong, let me know if I did

I would highly recommend reading about all of the functionality below, you will probably find something extremely helpful.

1 Like

I use os to do pretty much anything I want to do in bash but don’t want to do in bash lol.

10 posts were split to a new topic: Fastest way to clear the Console in Python