# 创建一个示例字典my_dict={'name':'Alice','age':30,'gender':'female','city':'New York','email':'alice@example.com'}# 打印字典的前3行count=0forkey,valueinmy_dict.items():ifcount<3:print(f'{key}:{value}')count+=1else:break 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. ...
for key, value in my_dict.items(): print(key, value) ``` ### 字典方法 Python 字典提供了一些常用的方法,如keys()、values()、items()等,用来获取字典中的所有键、所有值、所有键值对等,例如: ```python my_dict = {"name": "Alice", "age": 30, "city": "New York"} print(my_dict.k...
result=[]forkey,valueindictionary.items():result.append((key,value))foriteminresult:print(item[0],item[1]) 1. 2. 3. 4. 5. 6. 5. 示例运行 让我们通过一个示例来运行上述代码,以便更好地理解纵向打印字典的过程。 dictionary={'name':'John','age':25,'city':'New York'}result=[]forkey...
my_tuple = (1, 2, 3, 4, 5) print(len(my_tuple)) # 输出:5,维数为1 ``` 3. 字典(Dictionary) 字典是一种键值对的数据结构,其中每个元素由键和值组成。在字典中,键是唯一的,值可以重复,维数为1(考虑键或值)。 ```python my_dict = {'a': 1, 'b': 2, 'c': 3} print(len(my_dic...
enumerate是Python的内置函数,用于将一个可遍历的数据对象(如列表、元组或字符串)组合为一个索引序列,同时列出数据和数据下标。 names = ['Alice', 'Bob', 'Charlie'] for index, name in enumerate(names, start=1): print(index, name) 4. 字典推导式(Dictionary Comprehensions) ...
Print specific key-value pairs of a dictionary in Python I wrotea bookin which I share everything I know about how to become a better, more efficient programmer. You can use the search field on myHome Pageto filter through all of my articles. ...
#!/usr/bin/python tinydict = {'Name': 'Runoob', 'Age': 27} print ("Age : ", tinydict.get('Age')) # 没有设置 Sex,也没有设置默认的值,输出 None print ("Sex : ", tinydict.get('Sex')) # 没有设置 Salary,输出默认的值 0.0 print ('Salary: ', tinydict.get('Salary', 0.0...
Printing the values– To print the dictionary values only, loop through the dictionary and use thevalues()method, it returns the dictionary values. Syntax: for value in dictionary_name.values(): print(value) Print thekey-valuepairs– To print the keys & values both, loop thr...
However, this task can be achieved in two ways, both of which will be described in this article below. As an example, we will be taking a nested dictionary that contains the names of the countries against which Team India plays the match as the key, and the values include another ...
In this case the command line utility will be installed to~/.local/bin/tabulateon Linux and to%APPDATA%\Python\Scripts\tabulate.exeon Windows. To install just the library on Unix-like operating systems: TABULATE_INSTALL=lib-only pip install tabulate ...