action selection flag when patching

[ZeitgeberH]

Description

Add action selection flag in the dictdiffer.patch function to allow selectively patching. For example, set action_flags='a' would only apply add items in the differ_results. See examples in the test_limit_actions_patch function in tests/test_utils.py

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[Napam]

I would also like to have this functionality

[Napam]

One could also just filter the diffs returnerd by dictdiffer.diff to only include the changes one wants, for example:

diffs = dictdiffer.diff(a, b)
diffs = [diff for diff in diffs if diff[0] == 'add'] # Only do add operations
a = dictdiffer.patch(diffs, a)

[ZeitgeberH]

One could also just filter the diffs returnerd by dictdiffer.diff to only include the changes one wants, for example:

diffs = dictdiffer.diff(a, b)
diffs = [diff for diff in diffs if diff[0] == 'add'] # Only do add operations
a = dictdiffer.patch(diffs, a)

I think that may not work, as dictdiffer.diff return a generator, not a actual dict.

[Napam]

One could also just filter the diffs returnerd by dictdiffer.diff to only include the changes one wants, for example:

diffs = dictdiffer.diff(a, b)
diffs = [diff for diff in diffs if diff[0] == 'add'] # Only do add operations
a = dictdiffer.patch(diffs, a)

I think that may not work, as dictdiffer.diff return a generator, not a actual dict.

I can confirm that this works. I have done this for my project and it worked fine. I don't assume that diffs is a dict, but an iterable. Here is a more complete example:

import dictdiffer

a = {'a': 1}
b = {'b': 2}
diffs = dictdiffer.diff(a, b)
diffs = [diff for diff in diffs if diff[0] == 'add']
dictdiffer.patch(diffs, a) # Results in {'a': 1, 'b': 2}

[ZeitgeberH]

I see.Yes, it would work in the code example you provided.
I was thinking in more general cases in which a generator type rather than a list type is required.