Silently removing key from a python dict

Question

I have a python dict and I’d like to silently remove either None and '' keys from my dictionary so I came up with something like this:

try:
    del my_dict[None]
except KeyError:
    pass

try:
    del my_dict['']
except KeyError:
   pass

As you see, it is less readable and it causes me to write duplicate code. So I want to know if there is a method in python to remove any key from a dict without throwing a key error?

Asked By: Ozgur Vatansever

||

Source

Answer 1

The following will delete the keys, if they are present, and it won’t throw an error:

for d in [None, '']:
    if d in my_dict:
        del my_dict[d]

Answered By: Simeon Visser

Answer 2

You could use the dict.pop method and ignore the result:

for key in [None, '']:
    d.pop(key, None)

Answered By: Jon Clements

Answer 3

You can do this:

d.pop("", None)
d.pop(None, None)

Pops dictionary with a default value that you ignore.

Answered By: Keith

Answer 4

You can try:

d = dict((k, v) for k,v in d.items() if k is not None and k != '')

or to remove all empty-like keys

d = dict((k, v) for k,v in d.items() if k )

Answered By: Maksym Polshcha

Silently removing key from a python dict

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