Removing multiple keys from a dictionary safely

Michael Zippo

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I know how to remove an entry, "key" from my dictionary d, safely. You do:

if d.has_key("key"):
    del d["key"]

However, I need to remove multiple entries from a dictionary safely. I was thinking of defining the entries in a tuple as I will need to do this more than once.

entities_to_remove = ("a", "b", "c")
for x in entities_to_remove:
    if x in d:
        del d[x]

However, I was wondering if there is a smarter way to do this?

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Removing multiple keys from a dictionary safely 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

Removing multiple keys from a dictionary safely del: Questions

__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

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 Removing multiple keys from a dictionary safely, check other __del__-related topics.

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Javier Zelotti

Munchen | 2023-03-22

Ev PHP module is always a bit confusing 😭 Removing multiple keys from a dictionary safely is not the only problem I encountered. Checked yesterday, it works!

Javier Emmerson

Tallinn | 2023-03-22

Thanks for explaining! I was stuck with Removing multiple keys from a dictionary safely for some hours, finally got it done 🤗. Will use it in my bachelor thesis

Frank Sikorski

London | 2023-03-22

Maybe there are another answers? What Removing multiple keys from a dictionary safely exactly means?. I just hope that will not emerge anymore