assign a value to a dict change all the values

[aster]

hello,

i am really getting mad with these few lines of code

from random import randint

header = ["test", "1", "2", "12", "GG", "NG"]
lis = ["alpha", "beta", "gamma"]

list_p = list()
dict_p = dict.fromkeys(header)

def random():

    for item in lis:
        dict_p["test"] = item
        for key in list(dict_p.keys())[1:]:
            dict_p[key] = randint(1,600)/100.0

        list_p.append(dict_p)
        
    return list_p

print(random())

i know from here that Changing One dict value changes all values in a list and even if i feel completely dumb i am not able to apply these answers to my case

could you explain what i am doing wrong?