Check if key-value combinations can be found in Python dict-CodePudding

I am looking for a function found_in_color_dict() which tells me if a certain key-value combination can be found in color_dict. The function returns True or False, respectively.

color_dict = {"a":"blue", "b":"green", "c":"yellow", "d":"red", "e":"black", "f":"white"}

checkpoints_1 = {"a":"blue"}
checkpoints_2 = {"a":"green"}
checkpoints_3 = {"a":"blue", "d":"red"}
checkpoints_4 = {"a":"blue", "d":"red", "f":"white"}
checkpoints_5 = {"a":"blue", "d":"red", "f":"purple"}

Based on the example I would expect the following results:

found_in_color_dict(checkpoints_1)
>>> True

found_in_color_dict(checkpoints_2)
>>> False

found_in_color_dict(checkpoints_3)
>>> True

found_in_color_dict(checkpoints_4)
>>> True

found_in_color_dict(checkpoints_5)
>>> False

I can only think of complex approaches to solve this problem. But I guess there might be an easy way to solve it, right?

CodePudding user response：

You can use set.issubset:

Note: dict.itemview acts as a set

def found_in_color_dict(checkpoint):
    return checkpoint.items() <= color_dict.items()

>>> found_in_color_dict(checkpoints_1)
True
>>> found_in_color_dict(checkpoints_2)
False
>>> found_in_color_dict(checkpoints_3)
True
>>> found_in_color_dict(checkpoints_4)
True
>>> found_in_color_dict(checkpoints_5)
False

CodePudding user response：

You can use all() like so:

color_dict = {"a":"blue", "b":"green", "c":"yellow", "d":"red", "e":"black", "f":"white"}
def found_in_color_dict(d):
    global color_dict
    return all(i in color_dict.items() for i in d.items())

Test code:

checkpoints_1 = {"a":"blue"}
checkpoints_2 = {"a":"green"}
checkpoints_3 = {"a":"blue", "d":"red"}
checkpoints_4 = {"a":"blue", "d":"red", "f":"white"}
checkpoints_5 = {"a":"blue", "d":"red", "f":"purple"}

print(found_in_color_dict(checkpoints_1),
found_in_color_dict(checkpoints_2),
found_in_color_dict(checkpoints_3),
found_in_color_dict(checkpoints_4),
found_in_color_dict(checkpoints_5))

Output:

True False True True False