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I have an existing file on disk (say /folder/file.txt) and a FileField model field in Django.
When I do
instance.field = File(file("/folder/file.txt"))
instance.save()
it re-saves the file as file_1.txt (the next time it"s _2, etc.).
I understand why, but I don"t want this behavior - I know the file I want the field to be associated with is really there waiting for me, and I just want Django to point to it.
How?
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Set Django"s FileField to an existing file __del__: Questions
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.
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).
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
Set Django"s FileField to an existing file __del__: Questions
How to delete a file or folder in Python?
5 answers
How do I delete a file or folder in Python?
Answer #1
os.remove()removes a file.os.rmdir()removes an empty directory.shutil.rmtree()deletes a directory and all its contents.
Path objects from the Python 3.4+ pathlib module also expose these instance methods:
pathlib.Path.unlink()removes a file or symbolic link.pathlib.Path.rmdir()removes an empty directory.
We hope this article has helped you to resolve the problem. Apart from Set Django”s FileField to an existing file, check other __del__-related topics.
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Singapore | 2023-03-24
iat is always a bit confusing 😭 Set Django”s FileField to an existing file is not the only problem I encountered. Checked yesterday, it works!
Texas | 2023-03-24
code Python module is always a bit confusing 😭 Set Django”s FileField to an existing file is not the only problem I encountered. Will use it in my bachelor thesis
Berlin | 2023-03-24
Thanks for explaining! I was stuck with Set Django”s FileField to an existing file for some hours, finally got it done 🤗. Will use it in my bachelor thesis
