Datetime dictionary keys cause entire path to be None

[laundmo]

Describe the bug
When comparing 2 dictionaries with datetimes as keys, the path becomes None.

To Reproduce

from deepdiff import DeepDiff
from datetime import datetime, timedelta as td

now = datetime.now()
a = {now: 1, now+td(1): 2}
b = {now: 2, now+td(1): 4}
diff = DeepDiff(a, b)
print(diff)
print(diff.pretty())

result

{'values_changed': {None: {'new_value': 4, 'old_value': 2}}}
Value of None changed from 1 to 2.
Value of None changed from 2 to 4.

Expected behavior
i expected the deepdiff to properly check whether 2 datetimes are the same or not, ans give me the datetime __repr__ or __str__ in the path instead of None

OS, DeepDiff version and Python version (please complete the following information):

• DeepDiff version: 5.5.0
• Python version: Python 3.9.0 (tags/v3.9.0:9cf6752, Oct 5 2020, 15:34:40) [MSC v.1927 64 bit (AMD64)] on win32
• OS: Windows 10 10.0.19042 Build 19042

[seperman]

@laundmo Thanks for reporting this edge case bug. I will look into it when I have a chance!

[laundmo]

i modified the example to clearly have 2 different datetimes per dict (edited the main post)
one oddity is that .pretty() still shows both diffs, albeit with None, even though printing out the diff itself only shows 1 change.

looking at the code it seems the __repr__ of the DeepDiff object is inherited from dict, have you considered it might be cleaner to implement your own which is able to accurately represent the fact that the DeepDiff objects doesn't care about duplicate keys, as the .pretty() result shows

[seperman]

Hi @laundmo
This issue is fixed and DeepDiff 5.6.0 is released.
https://zepworks.com/deepdiff/5.6.0/