![]() ![]() We then compose a new dict using these keys with a tuple of the values from each dict substituting in our missing token when the key isn't present. These are the only keys that have changed from one dict to the next. We then make a new dict from that to collapse the keys together and iterate over these. Each tuple represents one key/value pair from your dictionary. This generates a set of distinct (key, value) tuples from the two dicts. Here is how to turn each dictionary into a set we can use: set1 set (ems ()) set2 set (ems ()) This returns a set containing a series of tuples. In reality, these two operators cover just a small fraction of the most frequent use cases. ![]() Most books and tutorials teach object comparison by using either the or the is operator. The way we've been taught to compare two objects in Python is a bit misleading. It can be helpful to extend and merge the list. def comparedict (dict1, dict2): for x1 in dict1.keys (): z dict1.get (x1) dict2.get (x1) if not z: print key, x1) print value A, dict1.get (x1), nvalue B, dict2. Comparing two dictionaries checks each corresponding key-value pair between the two dictionaries for equality. We use the symmetric difference set operator on the tuples generated from taking items. It turns out comparing two lists in Python is just so tricky as comparing dict s. In python, its hierarchical dictionary with the sum of the value changes for each set of keys using default dict. Key: (a.get(key, missing), b.get(key, missing))Įxample print(diff_dicts()) The easiest way to compare Python dictionaries is simply to use the same equality operator you use on other Python types. :return: A dict of keys to tuples with the matching value from a and b :param missing: A token used to indicate the dict did not include this key If a value differs from `a` to `b` then the value in the returned dict willīe: `(a_value, b_value)`. A function using the symmetric difference set operator, as mentioned in other answers, which preserves the origins of the values: def diff_dicts(a, b, missing=KeyError):įind keys and values which differ from `a` to `b` as a dict. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |