JSON object must be str, bytes or bytearray, not dict

json.loads take a string as input and returns a dictionary as output.

json.dumps take a dictionary as input and returns a string as output.

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With json.loads({"('Hello',)": 6, "('Hi',)": 5}),

You are calling json.loads with a dictionary as input.

You can fix it as follows (though I’m not quite sure what’s the point of that):

d1 = {"('Hello',)": 6, "('Hi',)": 5}
s1 = json.dumps(d1)
d2 = json.loads(s1)