[Python] How to use str.format with nested dict

I have a nested dict:

d = {
'A': {'X': 0, 'Y': 1, 'Z': 2},
'B': {'X': 0, 'Y': 1, 'Z': 2},
'C': {'X': 0, 'Y': 1, 'Z': 2}
}


I'd now like to embed its values in a string using format, something like

"d['A']['X']={A,X:d}".format(**d)


to output:

"d['A']['X']=0"


How to do this correctly?

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