在Python中,字典(dictionary)是一种非常常用的数据结构,用于存储键值对。当字典中的键值对较多时,如果直接使用print函数打印字典,可能会导致输出结果过长,不易于阅读。因此,我们需要将字典的内容按行显示,以提高可读性。 本文将向刚入行的小白开发者介绍如何实现Python字典的分行显示。 实现步骤 下面是实现Python字典分...
Python example to print the key value of a dictionary. stocks = {'IBM':146.48,'MSFT':44.11,'CSCO':25.54}print(stocks)fork, vinstocks.items():print(k, v)forkinstocks:print(k, stocks[k])Copy Output {'IBM': 146.48,'MSFT': 44.11,'CSCO': 25.54} IBM 146.48 MSFT 44.11 CSCO 25.54 IBM...
By using thedictionary'scopy()method, you can create a copy of the dictionary and make the changes in the copied dictionary. Example Consider the below program - dict1={"key1":"abc","key2":"efg"}print(dict1)dict3=dict1.copy()print(dict3)dict3['key2']='xyz'print(dict1)print(dic...
Aside from the conversion, it also formats the dictionary into a pretty JSON format, so this can be a viable way to pretty print a dictionary by first converting it into JSON. The dumps() function accepts 3 parameters used for pretty printing: the object for conversion, a boolean value ...
If you need to destructively iterate through a dictionary in Python, then .popitem() can do the trick for you: Python >>> likes = {"color": "blue", "fruit": "apple", "pet": "dog"} >>> while True: ... try: ... print(f"Dictionary length: {len(likes)}") ... item ...
('goose', 3), ('duck', 4)] #输出都一样 >>> print(d1,d2,d3,sep='\n') {'cat': 0, 'dog': 1, 'bird': 2, 'goose': 3, 'duck': 4} {'cat': 0, 'dog': 1, 'bird': 2, 'goose': 3, 'duck': 4} {'cat': 0, 'dog': 1, 'bird': 2, 'goose': 3, 'duck'...
The same goes if we try and update a key in the meal block. We’ll replace the key Fruit with Circle Fruit and copy its value before popping it out of the dictionary. meal["Circle Fruit"] = meal.pop("Fruit") print(food) print(meal) Output: {'Vegetable': 'Lettuce', 'Poultry':...
In [206]: a Out[206]: {'apple': 2,'banana': 3,'pear': 5} In [207]: list(a.values()) Out[207]: [2, 3, 5] 4. python 使用一行代码打印字典键值对 (python print dictionary key-value pairs with one line of code) https://thispointer.com/python-4-ways-to-print-items-of-a-...
print(thisdict) Try it Yourself » Dictionary Length To determine how many items a dictionary has, use thelen()function: Example Print the number of items in the dictionary: print(len(thisdict)) Try it Yourself » Dictionary Items - Data Types ...
d = {'a': 1, 'b': 2} if 'c' in d: print True # DO NOT USE if d.has_key('c'): print True for key in d: print key # DO NOT USE for key in d.keys(): print key Python的dict对象是对KEY做过hash的,而keys()方法会将dict中所有的KEY作为一个list对象;所以,直接使用in的时候...