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Python rename file if exists

In this article we will discuss how to remove a file if only it exists and how to handle other types of exceptions using os.

python rename file if exists

It accepts the file path as argument and deletes the file at that path. File path can be relative to current working directory or an absolute path. As os. Your email address will not be published. This site uses Akismet to reduce spam.

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Learn how your comment data is processed. Python : How to remove a file if exists and handle errors os. How to remove a file using os.

Remove a file. As file at filePath is deleted now, so we should check if file exists or not not before deleting them. Handle errors while calling os. Related Posts: Python : How to remove files by matching pattern wildcards certain extensions only?

Python : How to delete a directory recursively using shutil. How to check if a file or directory or link exists in Python? How to change current working directory in python? Python : How to remove element from a list by value or Index remove vs pop vs del Python : How to check if a directory is empty? Python: Search strings in a file and get line numbers of lines containing the string.This module offers classes representing filesystem paths with semantics appropriate for different operating systems.

It instantiates a concrete path for the platform the code is running on. If you want to manipulate Windows paths on a Unix machine or vice versa. You want to make sure that your code only manipulates paths without actually accessing the OS. PEP : The pathlib module — object-oriented filesystem paths.

For low-level path manipulation on strings, you can also use the os. There are three ways to access these classes, which we also call flavours :. Each element of pathsegments can be either a string representing a path segment, an object implementing the os. PathLike interface which returns a string, or another path object:. When several absolute paths are given, the last is taken as an anchor mimicking os. Spurious slashes and single dots are collapsed, but double dots '. Pure path objects implement the os.

PathLike interface, allowing them to be used anywhere the interface is accepted. Changed in version 3. PathLike interface. A subclass of PurePaththis path flavour represents non-Windows filesystem paths:.

A subclass of PurePaththis path flavour represents Windows filesystem paths:. Paths are immutable and hashable. Paths of a same flavour are comparable and orderable. The slash operator helps create child paths, similarly to os. A path object can be used anywhere an object implementing os. PathLike is accepted:. The string representation of a path is the raw filesystem path itself in native form, e. Similarly, calling bytes on a path gives the raw filesystem path as a bytes object, as encoded by os.

Calling bytes is only recommended under Unix. Under Windows, the unicode form is the canonical representation of filesystem paths.

If you want to walk an arbitrary filesystem path upwards, it is recommended to first call Path. Represent the path as a file URI.

Rename multiple files using Python

Return whether the path is absolute or not. A path is considered absolute if it has both a root and if the flavour allows a drive:.

With PurePosixPathFalse is always returned. Calling this method is equivalent to combining the path with each of the other arguments in turn:. Match this path against the provided glob-style pattern. Return True if matching is successful, False otherwise. If pattern is relative, the path can be either relative or absolute, and matching is done from the right:. Compute a version of this path relative to the path represented by other.

Return a new path with the name changed. Return a new path with the suffix changed. If the suffix is an empty string, the original suffix is removed:.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

I have a script that takes a file from a form, renames it and uploads it to a folder and inserts record into a database. I would like to add the functionality where before the file is saved, it checks the upload folder to determine if the filename exists. If it does exist, renames the file in a loop and then saves the file. Haven't tested this yet but you can use os. Have you tried to use the glob Moduleit provides an interface similar to lsyou can use it as it follows:.

Learn more. Python OS - check if file exists, if so rename, check again, then save Ask Question. Asked 3 years ago. Active 3 years ago. Viewed 6k times. Thank you Paul for informing being about the shutil module!. This will come in handy big time! Active Oldest Votes. Thank you jyap, just what I needed! Glad I could help. Walter N. Walter 79 3 3 bronze badges. Your code doesn't work. I will edit to satisfy the purpose. Sign up or log in Sign up using Google. Sign up using Facebook.

Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here.

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I've already read this thread but when I implement it into my code it only works for a few iterations. I'm using python to iterate through a directory lets call it move directory to copy mainly pdf files matching a unique ID to another directory base directory to the matching folder with the corresponding unique ID.

Check file or directory exists

I started using shutil. I'd like to be able to search the corresponding folder to see if the file already exists, and iteratively name it if more than one occurs. Sometimes it is just easier to start over I apologize if there is any typo, I haven't had the time to test it thoroughly. Learn more. Python copy files to a new directory and rename if file name already exists Ask Question.

Asked 6 years, 7 months ago. Active 6 months ago. Viewed 94k times. No, the structure is different. For instance, movdir is scans of property information and has been arranged by street name and the pdfs are named with the unique id.

Active Oldest Votes. You don't want to create it? Jblasco Jblasco 2, 14 14 silver badges 23 23 bronze badges. Thanks for this, when I run this I get an error saying "ii" is not defined. Could be because I'm using 2. No, it's that I messed up. I would say you have an indentation problem, at least as you wrote it here: while not os. It didn't change anything, unfortunately. And if you could update a little the code with the changes you have done, even if they didn't work, it would be great.

I think there should be no "not" in my correction, sorry about that! I will edit in a moment. I removed the "not" and it works! I tried moving it around to no avail!By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

python rename file if exists

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How do I see if a file exists or not, without using the try statement?

python rename file if exists

Checking and then opening risks the file being deleted or moved or something between when you check and when you try to open it. If you're not planning to open the file immediately, you can use os.

Return True if path is an existing regular file. This follows symbolic links, so both islink and isfile can be true for the same path. Starting with Python 3. To check whether a Path object exists independently of whether is it a file or directory, use exists :. You have the os. Unlike isfileexists will return True for directories. So depending on if you want only plain files or also directories, you'll use isfile or exists.

Here is some simple REPL output:. Use os. Although almost every possible way has been listed in at least one of the existing answers e. Python 3. Note : every piece of Python standard library code that I'm going to post, belongs to version 3.

Return True if path refers to an existing path or an open file descriptor. Returns False for broken symbolic links. On some platforms, this function may return False if permission is not granted to execute os. This also applies to other funcs including os. Under the hood, it does exactly the same thing pathlib. And its usage - I'll replicate the os. Use [Python 3]: contextlib. This allows common try Using scandir instead of listdir can significantly increase the performance of code that also needs file type or file attribute information, because os.

DirEntry objects expose this information if the operating system provides it when scanning a directory. All os. Since these iterate over folders, in most of the cases they are inefficient for our problem there are exceptions, like non wildcarded glob bing - as ShadowRanger pointed outso I'm not going to insist on them. Not to mention that in some cases, filename processing might be required. So, as AaronHall rightly pointed out, don't use it unless you know what you're doing:. Note : calling native API s is also possible via [Python 3]: ctypes - A foreign function library for Pythonbut in most cases it's more complicated.

CDLL None. If filename is NULL, then the returned handle is for the main program.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

python rename file if exists

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Is it possible to force a rename os. For example in the code below if the file Tests. You could try shutil. Since Python 3. Rename the file or directory src to dst.

Python - Rename Files

If dst is a directory, OSError will be raised. If dst exists and is a file, it will be replaced silently if the user has permission.

The operation may fail if src and dst are on different filesystems. However, contrary to the documentation, on Windows it's not guaranteed to be atomic in Python 3. That's because internally it uses MoveFileEx on Windows, which doesn't make such a guarantee. As the documentation says it's impossible to guarantee an atomic renaming operation on Windows if the file exists so what Python does is asking to do the double step os. On unix systems rename overwrites the destination if exists because the operation is guaranteed to be atomic.

Note that on windows it's also possible that deleting the destination file will fail even if you have permission because the file may be in use. This is another essential limitation of the windows file system and you have to handle it yourself in the code.

On Unix, if dst exists and is a file, it will be replaced silently if the user has permission. The operation may fail on some Unix flavors if src and dst are on different filesystems. On Windows, if dst already exists, OSError will be raised even if it is a file; there may be no way to implement an atomic rename when dst names an existing file. Funny enough, the documentation for os. They mention something vague about it being impossible to implement atomic renaming if the destination exists on Windows, which IMO is hardly enough reason not to support it.

You should catch OSError destination exists on Windows and remove the destination and try again, I suppose. So the only solution, unfortunately, would be to change operating systems; Windows simply disallows a rename atop an existing file. Learn more. Force Overwrite in Os. Rename Ask Question. Asked 8 years, 5 months ago. Active 4 years, 2 months ago.

Viewed 51k times. Splashlin Splashlin 5, 9 9 gold badges 41 41 silver badges 50 50 bronze badges.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

As the title says, I wanted a python program that changes the file name, but I wanted to overwrite if there already is a file with that destination name.

On Windows os. You have to remove it first. You can catch the error and try again after removing the file:. You can use shutil. If the file exists, remove it first before renaming the original file. Of course you should check if you are not removing the original file so script.

Learn more. Python program to rename file names while overwriting if there already is that file Ask Question. Asked 4 years, 11 months ago. Active 10 months ago. Viewed 19k times. Remove the file and try again? Active Oldest Votes. Padraic Cunningham Padraic Cunningham k 17 17 gold badges silver badges bronze badges. Thank you but does this really overwrite? It seems like it just ignores it when there is destination file.

Snicksie Snicksie 1, 16 16 silver badges 26 26 bronze badges. Shabir Shabir 27 6 6 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. The Overflow How many jobs can be done at home? Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap. Triage needs to be fixed urgently, and users need to be notified upon….

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Akinotaxe Posted on 10:12 pm - Oct 2, 2012

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