2019年7月1日 · When you want to collect an immutable ordered list of elements, use a tuple. (For example, when you want a (name, phone_number) pair that you wish to use as an element in a set, you would need a tuple rather than a list since sets require elements be immutable). When you want to collect a mutable ordered list of elements, use a list. (For ...

2020年7月3日 · I have been trying to understand what the difference is between lists, tuples, dictionaries, and sets. All I've been able to gather is they use different brackets or braces. () {} []. Some are able...

2010年9月6日 · List is a mutable type meaning that lists can be modified after they have been created. A tuple is similar to a list except it is immutable. There is also a semantic difference between a list and a tuple. To quote Nikow's answer: Tuples have structure, lists have order. A dictionary is a key-value store.

2021年7月8日 · Dictionary is used when you have to sets of data where data of the first set corresponds to data of other set. And the position of the data doesn't matter only the relation of the two sets matters. A tuple is used when position of the data is very important and you don't want to alter the position throughout.

2019年3月5日 · In Python 2.7, suppose I have a list with 2 member sets like this d = [(1, 'value1'), (2, 'value2'), (3, 'value3')] What is the easiest way in python to turn it into a dictionary like this: d = ...

2013年1月20日 · To get the names of the prisoners using the dictionary, you just do this: d.values() To do the same thing with the list of tuples you would need to do this: names = [] for tup in l: names.append(tup[1]) The dictionary values are mutable, meaning they can be allowed to be changed. You can not do the same thing with a tuple (it is immutable). E.g

It seems everyone here assumes the list of tuples have one to one mapping between key and values (e.g. it does not have duplicated keys for the dictionary). As this is the first question coming up searching on this topic, I post an answer for a more …

2024年12月9日 · we can also change the dictionary inside tuple as . my_tuple[4]['a'] = 500 which will make the overall tuple looks like (10, 20, 30, [400, 500], {'a': 500}) This happens because list and dictionary are the objects and these objects are not changing, but the contents its pointing to. So the tuple remains immutable without any exception

2009年11月23日 · You can't change a tuple itself. You have to replace it by a different tuple. When you use a list, you could also add values to it (changing the list itself) without need to replace it: >> a = {'list': (23, 32)} >> a {'list': [23, 32]} >> a['list'].append(99) >> a {'list': [23, 32, 99]}

2010年8月16日 · dict(zip(a_list, a_tuple)).update(a_dictionary) when a_list is your list, a_tuple is your tuple and a_dictionary is your dictionary. EDIT: If you really wanted to turn the numbers in you tuple into strings than first do: new_tuple = tuple((str(i) for i in a_tuple)) and pass new_tuple to the zip function.