Javascript Removes All Files From Directory

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You can delete files from your computer using Python. The os.remove () method removes individual Python files. os.rmdir () removes a file or directory. The shutdown.rmtree () method will delete a directory and the files it contains.

Developers use files in Python programs for various purposes. When working with files, one of the most important functions you should know is how to delete a file.

For example, let’s say you create a program that analyzes the performance of the S&P 500 Index and stores the results in a file. You can delete any existing scan files to make room for the new file.

In Python, you can use the os.remove () method to delete files and the os.rmdir () method to delete an empty folder . If you want to delete a folder with all of its files, you can use the shutdown.rmtree () method.

This tutorial explains how to delete Python files and folders using os. remove (), os.rmdir () and shutdown.rmtree (). We’ll also look at an example of each of these methods used to delete a file or folder.

Python File Removal Tutorial

You can remove Python files using os.remove (), os.rmdir (), and shutdown.rmtree (). These methods respectively delete a file, a directory and a folder with all of its files.

How to remove a file in Python using os.remove ()

The Python os.remove () method removes a file from your system operation. os.remove () removes only one file. He cannot delete a directory.

The os module allows developers to interface with the operating system and file systems of a computer. os.remove () is a method included in the os Python module that allows you to remove a single file.

Before we start working with these methods, we need to import the os using an Python import statement .

The os facilitates interactions with the operating system in Python. We can do this using the following code:

We are now ready to start removing files in Python, the os.remove () module in Python. Let’s look at the syntax of the os.remove () path method:

The os.remove () method takes one parameter: the location of the file you want to remove.

Let’s say we create a program that analyzes the grades students get in a math class over the course of a year.

We want to create a file called / home / school / math / final_analysis.csv with our analyzed data. But, before our program creates this file, we first need to make sure that it doesn’t already exist.

We could use the following code to delete this file:

Our file was deleted We printed the following message was printed to the console using a Python print instruction () :

In the first line we import the os module , which contains the os.remove () method that we want to re wound in our program. Next, we define a Python variable called path. This variable stores the path to the file we want to delete.

We then use os.remove () and specify our path variable as the path to the file, which will delete our file.

Remove empty directory using Python os.rmdir ()

The os.remove () method cannot be used to delete a folder. Instead, we can use the os.rmdir () method. The os.rmdir () method allows you to delete an empty file or directory.

os.rmdir () takes one parameter: the path of the file you want to delete. Here is the syntax of the os.rmdir () method:

Let’s say we decided to store our processed data in a folder called final within our / home / school directory / mathematics. Every time we run our program, we want to remove the directory from the final folder. This is because our program will create a new one with the processed data.

We could use the following code to delete the final folder:

Our code removes the / home / school / math / final directory and returns the following message to the console:

The os.rmdir () method can only be used to delete an empty directory. If you specify a folder containing files, the following error will be returned:

Pytho n os Error handling

In the previous examples, we have indicated that in some cases a permission error can be returned from an argument. If we use os.remove () to remove a directory, an error will be returned. If we use os.rmdir () to delete a directory containing files, an error will be returned.

When deleting files in a program, you may want to have a function that handles your errors elegantly if an error occurs. We can do this using a except test block.

Here is our example of the os.rmdir () method above, but with an error handling mechanism that will print a message by default if any exceptions are lifted:

Now, if we run our code and no error is returned, our directory will be deleted and the following message will be returned:

However, if we run our code and try to delete a directory containing files, for example, the following message will be returned:

In our code, we used a except test block. This procedure first executes the lines of code inside the try block. If an error occurs, it will execute the code inside the except block. In this case, the except block will only be executed if an OSError is raised.

If you want to learn more about error handling using try except blocks in Python, read our tutorial on Python try except .

Delete Python files with directories

The Shutil library includes a method called Shutil. Rmtree () which can be used to remove a directory containing files.

The Shutil library offers a number of functions related to file operations. In our case, we want to focus on Shutil. rmtree () method, which removes an entire directory tree.

Here is the syntax of the shutdown.rmtree () method:

Note that we imported the Shutil module in our code, because shutdown.rm tree () is part of ’an external library, such as os.remove (), so we need to import the library before we can use

Let’s illustrate an example to show how this method can be used. Suppose our note analysis program needs to delete the final directory, but that directory already includes the files with our processed data. To delete the directory and all of its files, we could use the following code:

Our code removes the folder final and all of its contents, then print the following message to the console:

Conclusion

Deleting files is a common operation in Python. The os.remove () method can be used to remove a specific file and the os.rmdir () method can be used to remove an empty directory. Additionally, you can use the shutdown.rmtree () method to delete a folder containing one or more files.

To learn more about coding in Python, read our full guide on How to learn Python .

Javascript Removes All Files From Directory __del__: Questions

__del__

How can I make a time delay in Python?

5 answers

I would like to know how to put a time delay in a Python script.

2973

Answer #1

import time
time.sleep(5)   # Delays for 5 seconds. You can also use a float value.

Here is another example where something is run approximately once a minute:

import time
while True:
    print("This prints once a minute.")
    time.sleep(60) # Delay for 1 minute (60 seconds).

2973

Answer #2

You can use the sleep() function in the time module. It can take a float argument for sub-second resolution.

from time import sleep
sleep(0.1) # Time in seconds

__del__

How to delete a file or folder in Python?

5 answers

How do I delete a file or folder in Python?

2639

Answer #1


Path objects from the Python 3.4+ pathlib module also expose these instance methods:

Javascript Removes All Files From Directory __delete__: Questions

2639

Answer #2


Path objects from the Python 3.4+ pathlib module also expose these instance methods:

2639

Answer #3

Python syntax to delete a file

import os
os.remove("/tmp/<file_name>.txt")

Or

import os
os.unlink("/tmp/<file_name>.txt")

Or

pathlib Library for Python version >= 3.4

file_to_rem = pathlib.Path("/tmp/<file_name>.txt")
file_to_rem.unlink()

Path.unlink(missing_ok=False)

Unlink method used to remove the file or the symbolik link.

If missing_ok is false (the default), FileNotFoundError is raised if the path does not exist.
If missing_ok is true, FileNotFoundError exceptions will be ignored (same behavior as the POSIX rm -f command).
Changed in version 3.8: The missing_ok parameter was added.

Best practice

  1. First, check whether the file or folder exists or not then only delete that file. This can be achieved in two ways :
    a. os.path.isfile("/path/to/file")
    b. Use exception handling.

EXAMPLE for os.path.isfile

#!/usr/bin/python
import os
myfile="/tmp/foo.txt"

## If file exists, delete it ##
if os.path.isfile(myfile):
    os.remove(myfile)
else:    ## Show an error ##
    print("Error: %s file not found" % myfile)

Exception Handling

#!/usr/bin/python
import os

## Get input ##
myfile= raw_input("Enter file name to delete: ")

## Try to delete the file ##
try:
    os.remove(myfile)
except OSError as e:  ## if failed, report it back to the user ##
    print ("Error: %s - %s." % (e.filename, e.strerror))

RESPECTIVE OUTPUT

Enter file name to delete : demo.txt
Error: demo.txt - No such file or directory.

Enter file name to delete : rrr.txt
Error: rrr.txt - Operation not permitted.

Enter file name to delete : foo.txt

Python syntax to delete a folder

shutil.rmtree()

Example for shutil.rmtree()

#!/usr/bin/python
import os
import sys
import shutil

# Get directory name
mydir= raw_input("Enter directory name: ")

## Try to remove tree; if failed show an error using try...except on screen
try:
    shutil.rmtree(mydir)
except OSError as e:
    print ("Error: %s - %s." % (e.filename, e.strerror))

__delete__

Is there a simple way to delete a list element by value?

5 answers

I want to remove a value from a list if it exists in the list (which it may not).

a = [1, 2, 3, 4]
b = a.index(6)

del a[b]
print(a)

The above case (in which it does not exist) shows the following error:

Traceback (most recent call last):
  File "D:zjm_codea.py", line 6, in <module>
    b = a.index(6)
ValueError: list.index(x): x not in list

So I have to do this:

a = [1, 2, 3, 4]

try:
    b = a.index(6)
    del a[b]
except:
    pass

print(a)

But is there not a simpler way to do this?

1055

Answer #1

To remove an element"s first occurrence in a list, simply use list.remove:

>>> a = ["a", "b", "c", "d"]
>>> a.remove("b")
>>> print(a)
["a", "c", "d"]

Mind that it does not remove all occurrences of your element. Use a list comprehension for that.

>>> a = [10, 20, 30, 40, 20, 30, 40, 20, 70, 20]
>>> a = [x for x in a if x != 20]
>>> print(a)
[10, 30, 40, 30, 40, 70]

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