Python printing dictionary keys and values

Как распечатать элементы словаря в Python

Чтобы напечатать элементы словаря пары ключ:значение, вы можете использовать dict.items(), dict.keys() или dict.values.(), функцию print().

В этом руководстве мы рассмотрим примеры программ, чтобы напечатать словарь как одну строку, словарь пары ключ:значений по отдельности, ключи словаря и значения словаря.

Распечатать словарь, как одну строку

Чтобы распечатать все содержимое словаря, вызовите функцию print() со словарем, переданным в качестве аргумента. print() преобразует словарь в одностроковый литерал и выводит на стандартный вывод консоли.

В следующей программе мы инициализируем словарь и распечатаем его целиком.

dictionary = print(dictionary)

Как распечатать пары ключ:значение?

Чтобы распечатать пары ключ:значение в словаре, используйте цикл for и оператор печати для их печати. dict.items() возвращает итератор для пар ключ:значение во время каждой итерации.

В следующей программе мы инициализируем словарь и распечатаем пары ключ:значение словаря с помощью цикла For Loop.

dictionary = for key,value in dictionary.items(): print(key, ':', value)

Печать ключей словаря

Чтобы напечатать ключи словаря, используйте цикл for для обхода ключей с помощью итератора dict.keys() и вызова функции print().

В следующей программе мы инициализируем словарь и распечатаем ключи словаря с помощью For Loop.

dictionary = for key in dictionary.keys(): print(key)

Печать значения словаря

Чтобы распечатать значения словаря, используйте цикл for для просмотра значений словаря с помощью итератора dict.values() и вызова функции print().

В следующей программе мы инициализируем словарь и распечатаем значения словаря с помощью For Loop.

dictionary = for value in dictionary.values(): print(value)

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How to print keys and values of a python dictionary

In this tutorial, we will learn how to print the keys and values of a dictionary in Python. For printing the keys and values, we can either iterate through the dictionary one by one and print all key-value pairs or we can print all keys or values in one go. For this tutorial, we are using Python 3.

Print all key-value pairs using a loop :

This is the simplest way to print all key-value pairs of a Python dictionary. With one for loop, we can iterate through the keys of the dictionary one by one and then print the keys with their associated value. To access the value of a key k of a dictionary dic , we can use square braces like dic[k] .

The following example will print the key-value pairs:

= "one": 1,"two":2,"three":3,"four":4> for item in my_dict: print("Key : <> , Value : <>".format(item,my_dict[item]))

This program is iterating through the keys of the dictionary my_dict . On each iteration of the loop, it will access the value of the current key item as like my_dict[item] .

: one , Value : 1 Key : two , Value : 2 Key : three , Value : 3 Key : four , Value : 4

As you can see, it printed the keys and values of the dictionary my_dict .

By using the items() method :

The items() method of Python dictionary returns a view object of the dictionary. It contains the key-value pairs of the dictionary as tuples in a list. For example,

= "one": 1,"two":2,"three":3,"four":4> print(my_dict.items())

([('one', 1), ('two', 2), ('three', 3), ('four', 4)])

We can iterate over these items of the list to print out the key-value pairs.

= "one": 1,"two":2,"three":3,"four":4> for key,value in my_dict.items(): print("Key : <> , Value : <>".format(key,value)) 

If you run this program, it will print a similar output.

By iterating through the keys :

Python dictionary provides the keys() method to get all keys from a Python dictionary. Then we can iterate through the keys one by one and print out the value for each key.

The keys() method returns a view object holding the keys of the dictionary. For example:

= "one": 1,"two":2,"three":3,"four":4> print(my_dict.keys())

We can use a for loop to iterate over the keys of a dictionary and for each key, we can use the curly braces to print the values. The following example prints the keys and values of the dictionary my_dict by using the keys() method.

= "one": 1,"two":2,"three":3,"four":4> for key in my_dict.keys(): print("Key : <> , Value : <>".format(key,my_dict[key]))

If you run this program, it will print the same output.

How to print the first and last N key-value pairs of a dictionary:

We can use list slicing to print the first and last N key-value pairs of a Python dictionary. The syntax of list slicing is:

• start is the index to start the slicing.
• stop is the index to stop the slicing.
• step is the step size.

We can only use the start and stop parameters to get the first and last N items of a list. For example,

= [1, 2, 3, 4, 5, 6, 7] print(given_list[3:]) print(given_list[:4])

Here, given_list[3:] will return one list with items from index 3 to the end of the list and given_list[:4] will return one list with items from the start to index 4 .

We can use the list() method to convert the items of a dictionary into a list. The dict.items() method returns the items, and list(dict.items()) will return the list of all dictionary items.

For example, the following program will print the first two key-value pairs of the dictionary my_dict :

= "one": 1, "two": 2, "three": 3, "four": 4> dict_list = list(my_dict.items())[:2] for k, v in dict_list: print(f"Key: k>, Value: v>")

: one, Value: 1 Key: two, Value: 2

Similarly, the following program will print the last three key-value pairs of the dictionary:

= "one": 1, "two": 2, "three": 3, "four": 4> dict_list = list(my_dict.items())[1:] for k, v in dict_list: print(f"Key: k>, Value: v>")

It will print the items starting from index 1 to the end of the list:

: two, Value: 2 Key: three, Value: 3 Key: four, Value: 4

You can use any of the above methods to iterate through the key-value pairs of a Python dictionary. We can use string slicing to print any N number of dictionary elements.

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Python – Print Dictionary

To print dictionary items: key:value pairs, keys, or values, you can use an iterator for the corresponding key:value pairs, keys, or values, using dict.items(), dict.keys(), or dict.values() respectively and call print() function.

In this tutorial, we will go through example programs, to print dictionary as a single string, print dictionary key:value pairs individually, print dictionary keys, and print dictionary values.

1. Print Dictionary as a single string

To print whole Dictionary contents, call print() function with dictionary passed as argument. print() converts the dictionary into a single string literal and prints to the standard console output.

In the following program, we shall initialize a dictionary and print the whole dictionary.

Python Program

dictionary = print(dictionary)

2. Print Dictionary key:value pairs

To print Dictionary key:value pairs, use a for loop to traverse through the key:value pairs, and use print statement to print them. dict.items() returns the iterator for the key:value pairs and returns key, value during each iteration.

In the following program, we shall initialize a dictionary and print the dictionary’s key:value pairs using a Python For Loop.

Python Program

dictionary = for key,value in dictionary.items(): print(key, ':', value)

3. Print Dictionary keys

To print Dictionary keys, use a for loop to traverse through the dictionary keys using dict.keys() iterator, and call print() function.

In the following program, we shall initialize a dictionary and print the dictionary’s keys using a Python For Loop.

Python Program

dictionary = for key in dictionary.keys(): print(key)

4. Print Dictionary values

To print Dictionary values, use a for loop to traverse through the dictionary values using dict.values() iterator, and call print() function.

In the following program, we shall initialize a dictionary and print the dictionary’s values using a Python For Loop.

Python Program

dictionary = for value in dictionary.values(): print(value)

Summary

In this tutorial of Python Examples, we learned how to print Dictionary, its key:value pairs, its keys or its values.

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How do I print the key-value pairs of a dictionary in python

i is the key, so you would just need to use it:

Python 3

d.items() returns the iterator; to get a list, you need to pass the iterator to list() yourself.

for k, v in d.items(): print(k, v) 

Python 2

You can get an iterator that contains both keys and values. d.items() returns a list of (key, value) tuples, while d.iteritems() returns an iterator that provides the same:

for k, v in d.iteritems(): print k, v 

A little intro to dictionary

d= d.keys() # displays all keys in list ['a','b'] d.values() # displays your values in list ['apple','ball'] d.items() # displays your pair tuple of key and value [('a','apple'),('b','ball') 

Print keys,values method one

for x in d.keys(): print(x +" => " + d[x]) 

for key,value in d.items(): print(key + " => " + value) 

You can get keys using iter

You can get value of key of dictionary using get(key, [value]) :

If key is not present in dictionary,when default value given, will return value.

for k,v in dict.items(): print(k, v) 

Another one line solution:

('key1', 'value1') ('key2', 'value2') ('key3', 'value3') 

(but, since no one has suggested something like this before, I suspect it is not good practice)

i think this should definitely be a more accepted answer! . i feel this answer demos the type of power in python that is mostly ignored. you can also do the follow to get rid of the ‘()’ . print(*[f»<': '.join(map(str,v))>» for i,v in enumerate(list(d.items()))], sep=’\n’) . or you can do the following to conveniently print index #’s as well print(*[f»[] <': '.join(map(str,v))>» for i,v in enumerate(list(d.items()))], sep=’\n’)

Can somebody explain why the * is needed and how it converts dict_values to actual values. Thank you.

The * operator also works as an «unpacker» (besides multiplying). So what happens is that it unpacks the dictionary items. It doesn’t convert, I would say it «opens» the box that d.items() is, and print receives the contents. «unpacking operator python» is the keyword for a more technical explanation.

not sure why you think this might be not a good practice, while i think a request to access to I/O with print command per each key-pair is much worse practice from efficiency point of view

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How to print all of the key/value pairs in a dictionary

Given a dictionary myDictionary , write a function that prints all of the key/value pairs of the dictionary, one per line, in the following format:

key: value key: value key: value 

def printKeyValuePairs(myDictionary): 

The Beatles: 10 Bob Dylan: 10 Radiohead: 5 

Welcome to Stack Overflow. This is not a homework completion service. Your instructor gave you the assignment, not us, and you’re going to need to do your own work. If we do it for you, you don’t learn anything. If you can’t get started, ask your teacher for help; they’re being paid to teach you.

3 Answers 3

for key in myDictionary: print("<>: <>".format(key, myDictionaryPython printing dictionary keys and values)) 

that just printed our the numbers, is there a way to also print out the artists name with the colon before the key

It’s just an easy way to format strings, you didn’t have to use the format function to accomplish this. But you can read more about what it is here: programiz.com/python-programming/methods/string/format

I read on SO somewhere there is a good reason not to either access dictionary values using myDictionaryPython printing dictionary keys and values over the following, or visa-versa, but I can’t recall where (or if I’m remembering correctly).

for key, value in myDictionary.items(): print(f": ") 

There are essentially two (modern) ways to do string formatting in Python, both covered in great detail [here][1]:

Both yield var1: var1, var2:VAR2 , but the latter is only supported in Python 3.6+.

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