progs/a460.py


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def frequency_lists(list1):
    list1 = [item for sublist in list1 for item in sublist]
    dic_data = {}
    for num in list1:
        if num in dic_data.keys():
            dic_data[num] += 1
        else:
            key = num
            value = 1
            dic_data[key] = value
    return dic_data