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import csv
with open("v.csv", "w") as csvfile:
cwriter = csv.writer(csvfile, delimiter=" ", quotechar="|", quoting=csv.QUOTE_MINIMAL)
for w, c in p.items():
cwriter.writerow(w + c)
Here, p is a dictionary, w and c both are strings.
When I try to write to the file it reports the error:
ValueError: I/O operation on closed file.
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ValueError : I/O operation on closed 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
ValueError : I/O operation on closed 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 ValueError : I/O operation on closed file, check other __del__-related topics.
Want to excel in Python? See our review of the best Python online courses 2023. If you are interested in Data Science, check also how to learn programming in R.
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San Francisco | 2023-03-22
string Python module is always a bit confusing 😭 ValueError : I/O operation on closed file is not the only problem I encountered. Checked yesterday, it works!
Milan | 2023-03-22
Maybe there are another answers? What ValueError : I/O operation on closed file exactly means?. Checked yesterday, it works!
Berlin | 2023-03-22
I was preparing for my coding interview, thanks for clarifying this - ValueError : I/O operation on closed file in Python is not the simplest one. Will use it in my bachelor thesis
