Menu
Data frame:
pair = collections.defaultdict(collections.Counter) e.g.
pair = {'doc1': {'word1':4, 'word2':3}, 'doc2': {'word1':2, 'word3':4}, 'doc3': {'word2':2, 'word4':1}, ...} I want to keep the data frame but alter the type of this part {'word1':4, 'word2':3} {'word1':2, 'word3':4}``... It is now a Counter and I need a dict.
I tried this to get the data from pair, but I do not know how to create a dict for each doc:
new_pair = collections.defaultdict(collections.Counter) for doc, tab in testing.form.items(): for word, freq in tab.items(): new_pair[doc][word] = freq I do not want to change the output. I just need that in each doc, the data type is dict, not Counter.
874
It is used to count hashable objects. Counter({'e': 3, 'd': 2, 'C': 1, 'o': 1, 'S': 1, 'p': 1, 'y': 1}). We can see from the output that the counter object has created countable hashable objects. It created using the Ascending order of terms which are occurring maximum times.
A Counter is simply a dict subclass. There is no need to "get" the dictionary; it is a dictionary, and supports all the dict operators and methods (although update works slightly differently).
A Counter is a dict subclass for counting hashable objects. It is a collection where elements are stored as dictionary keys and their counts are stored as dictionary values. Counts are allowed to be any integer value including zero or negative counts.
Accessing Elements in Python Counter To get the list of elements in the counter we can use the elements() method. It returns an iterator object for the values in the Counter.
A Counter is already a dict - or, a subclass of it. But, if you really need exactly a dict for some reason, then its a one-liner:
>>> c = Counter(word1=4, word2=3) >>> c Counter({'word1': 4, 'word2': 3}) >>> dict(c) {'word1': 4, 'word2': 3} Any Mapping (anything that behaves like a dictionary) can be passed into dict, and you will get a dict with the same contents. There is no need to iterate over it to construct it yourself.
This gives you one loop, with one line in the body instead of a nested loop. But any code of the form:
thing = a new empty collection for elem in old_thing: Add something to do with elem to thing Can usually be done in one line using a generator expression or a list, set or dict comprehension. We're building a dict, so a dict comprehension (the Examples section is what you're most interested in) seems likely. I'll leave coming up with it as an exercise for the reader. ;-)
81
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
