如果L1和L2是包含键和对应值的列表对象,则可以使用以下列表推导式语法构建字典对象. >>>L1=['a','b','c','d']>>>L2=[1,2,3,4]>>>d={L1[k]:L2[k]forkinrange(len(L1))}>>>d{'a':1,'b':2,'c':3,'d':4} Python 更多Python相关文章,请阅读:Python 教程 ...
The example creates a dictionary of cities with literal notation. Python dictionary fromkeysThe fromkeys is a class method to create a new dictionary with keys from an iterable and values set to a value. fromkeys.py data = ['coins', 'pens', 'books', 'cups']; items = dict.fromkeys(data...
Another method to convert two lists into a dictionary is by using dictionary comprehension. Adictionary comprehensionis a concise and more pythonic way to create a new dictionary from an iterable by specifying how the keys and values should be mapped to each other. See the following example. # ...
Create a new dictionary in Python>>> #Empty dictionary >>> new_dict = dict() >>> new_dict = {} >>> print(new_dict) {} >>> #Dictionary with key-vlaue >>> color = {"col1" : "Red", "col2" : "Green", "col3" : "Orange" } >>> color {'col2': 'Green', 'col3': ...
Usezipto create dictionary items from two lists. The first list contains keys, and the second contains the values. For example: my_dictionary = { "one": 1, "two": 2 } my_keys = ["three", "four"] my_values = [3, 4] for key,value in zip(my_keys, my_values): ...
Dictionaries in Python. In this tutorial you will learn about Dictionaries in python. It covers how to create a dictionary, how to access its elements, delete elements, append elements to dictionary, update a dictionary etc.
index = [1, 2, 3] languages = ['python', 'c', 'c++'] dictionary = dict(zip(index, languages)) print(dictionary) Run Code Output {1: 'python', 2: 'c', 3: 'c++'} We have two lists: index and languages. They are first zipped and then converted into a dictionary. The zip...
In this program, we are given a list of strings and a string. We need to create a tuple using the elements of the list and string. Submitted by Shivang Yadav, on December 15, 2021 While working with complex problems in Python, we need to create new collections that are a combination ...
Convert list into dictionary python, implying thedict.fromkeys()method, hence creating a dictionary from a list. A Pythonzip()function can be used to create a dictionary from two lists. Based on a list of values, you can create a new dictionary or convert list to dictionary python by apply...
You can convert a Python list to a dictionary using a dictionary comprehension, dict.fromkeys(), or the zip() method. All three methods create a new dictionary. They do not modify the existing list. Python lists and dictionaries are two structures used to store data. But what if you want...