Jun 21, 2009 · @hegash the d[key]=val syntax as it is shorter and can handle any object as key (as long it is hashable), and only sets one value, whereas the .update(key1=val1, key2=val2) …

I have two existing dictionaries, and I wish to 'append' one of them to the other. By that I mean that the key,values of the other dictionary should be made into the first dictionary. For example: ...

Here are quite a few ways to add dictionaries. You can use Python3's dictionary unpacking feature: ndic = {**dic0, **dic1} Note that in the case of duplicates, values from later arguments …

How do I add an item to an existing dictionary in Python? For example, given: default_data = { 'item1': 1 ...

You should use append to add to the list. But also here are few code tips: I would use dict.setdefault or defaultdict to avoid having to specify the empty list in the dictionary definition.

Mar 25, 2017 · # foo is a dictionary if foo.has_key(bar): foo[bar] += 1 else: foo[bar] = 1 I'm writing this a lot in my programs. My first reaction is to push it out to a helper function, but so often the …

You'll have to add the key separately, after the creating the initial dict: params = {'apple': apple} if orange is not None: params['orange'] = orange params = urllib.urlencode(params) Python has …

Jul 2, 2015 · In your current code, what Dictionary.update() does is that it updates (update means the value is overwritten from the value for same key in passed in dictionary) the keys in current …

Oct 7, 2017 · In Python 2 you can avoid making a temporary copy of all the values by using the itervalues() dictionary method, which returns an iterator of the dictionary's keys: …

(it is even slightly slower to make a list from one value to extend that). See What is the difference between Python's list methods append and extend?. Thus, what you show here to add a list …