In python-3.X dict.values doesn't return a list like how it performs in python-2.X. In python-3.x it returns a dict-value object which is a set-like object and uses a hash table for storing its items. This feature, in addition to supporting most of set attributes, is very optimized for some operations like membership checking (using in operator). And because of that, it doesn't support indexing.
If you want to get a list object, you need to convert it to list by passing the result to the list() function.
the_values = dict.values()
SUM = sum(list(the_values)[1:10])
2018年7月6日 ... 注：字典可以直接使用list转换成列表。 dit = {'name':'zxf',.
Jun 30, 2018 ... In this article we will discuss different ways to convert a single or multiple lists to dictionary in Python. Following conversions from list to ...
2019年9月16日 ... 将列表转化为元组li = [1, 2, 3] t = tuple(li) print(t, type(t)) # 打印结果:(1, 2, 3) <class ' tuple'> # 将元组转换成列表tu = (1, 2, 3) li = list(tu) print(li, ...
2015年12月18日 ... 说明：列表不可以转换为字典. ①转换后的列表为无序列表. a = {'a' : 1, 'b': 2, 'c' : 3}. #字典中的key转换为列表. key_value = list(a.keys()).
Use numpy.array() to convert a dictionary to an array. Call dict.items() to return a collection of the key-value pairs in dict . Use ...
python如何将dict转成list. Yannan_CR. 27. 发布于2017-07-26. 我有很多个dict， 例如{A:A1,B:B2,C:C3,D:D4},{A:AA1,C:CC3,D:DD4,E:EE5},{A:AAA1,B:BBB2 ...
2018年6月5日 ... ... 词 清除标记. python字典转为数组_python 数组变成字典的方法 ... python中如何 将字典直接变成二维数组_Python中将字典转换为列表的方法.
In python-3.X dict.values doesn't return a list like how it performs in python-2.X. In python-3.x it returns a dict-value object which is a set-like ...
I'm trying to convert a Python dictionary into a Python list, in order to perform some calculations. #My dictionary dict = {} dict['Capital']="London" ...
Jan 14, 2021 ... You can convert a Python list to a dictionary using the dict.fromkeys() method, a dictionary comprehension, or the zip() method. The zip() method ...
2016年10月7日 ... 本文针对前面利用Python 所做的一次数据匹配实验，整理了其中的一些对于csv 文件的读写操作和常用的Python'数据结构'（如字典和列表）之间的 ...
The following will do it: arr = np.array([(k,)+v for k,v in data_dict.iteritems()], \ dtype =[('date', '|O4'), ('high', '<f8'), ('low', '<f8')]). If you then wish to ...
b = dict(zip(a[::2], a[1::2])). If a is large, you will probably want to do something like the following, which doesn't make any temporary lists like the ...
Sep 25, 2020 ... To convert a list to dictionary, we can use list comprehension and make a key: value pair of consecutive elements. Finally, typecase the list to dict ...
Feb 22, 2018 ... Python's dictionary class has three methods for this purpose. The methods items (), keys() and values() return view objects comprising of tuple of ...
Dec 29, 2020 ... Return type: It returns the python dictionary object. Example 1: Let's suppose the JSON file looks like this: python-json. We want to convert the ...
May 3, 2015 ... The json module enables you to convert between JSON and Python ... To convert JSON to a Python dict use this: ... data = json.loads(array)
Feb 18, 2019 ... Given a dictionary, write a Python program to convert the given dictionary into list of tuples. Examples: Input: { 'Geeks': 10, 'for': 12, 'Geek': 31 } ...