print dictionary of list values

Last Updated : 28 Nov, 2021,GATE CS 2021 Syllabus

Syntax:

d.items()

we can iterate over the dictionary using for loop

for key, values in data.items():
   for i in values:
   print(key, " : ", i)

Output:

manoja: {
   'subject1': 'java',
   'marks': 98
}
manoja: {
   'subject2': 'PHP',
   'marks': 89
}
manoj: {
   'subject1': 'java',
   'marks': 78
}
manoj: {
   'subject2': 'PHP',
   'marks': 79
}

Suggestion : 2

You will have to do this instead.

for key, values in queue_dict.items():
   for v in values:
   print(key, " : ", v)

Suggestion : 3

In this article, we will discuss different ways to print line by line the contents of a dictionary or a nested dictionary in python.,In a single line using list comprehension & dict.items(), we can print the contents of a dictionary line by line i.e.,dict.items() returns an iterable view object of the dictionary that we can use to iterate over the contents of the dictionary, i.e. key-value pairs in the dictionary and print them line by line i.e.,It printed all the contents in a single line. Therefore, it is tough to understand the contents. Now to print the contents of a nested dictionary line by line, we need to do double iteration i.e.

As dictionary contains items as key-value pairs. So, first, let’s create a dictionary that contains student names and their scores i.e.

# A dictionary of student names and their score
student_score = {
   'Ritika': 5,
   'Sam': 7,
   'John': 10,
   'Aadi': 8
}

Now to print this dictionary, we directly pass it in the print function i.e.

print(student_score)

the output will be like,

{
   'Ritika': 5,
   'Sam': 7,
   'John': 10,
   'Aadi': 8
}

Output:

Ritika: 5
Sam: 7
John: 10
Aadi: 8

We can iterate over the keys of a dictionary one by one, then for each key access its value and print in a separate line i.e.

# A dictionary of student names and their score
student_score = {
   'Ritika': 5,
   'Sam': 7,
   'John': 10,
   'Aadi': 8
}

# Iterate over the keys in dictionary, access value & print line by line
for key in student_score:
   print(key, ' : ', student_score[key])

Suggestion : 4

Section 3 asks you to “Put It Together” by adding the names of the students into a dictionary (rather than a list):,This one is a little tricky, you don’t need to be using the students[x], in Python, when you use for x in students, it has already retrieved the different students’ names. After you fix that, all you need to do is change add x back before all of the property names, like this: x['name']. Hope it helps!,That tricky part that really had me stumped was that you can’t leave the values empty – if we have to use a dictionary, we can easily access information in the other dictionaries we’ve already created by referencing them as the values inside ‘students’ like so:,Hello. I’m really stuck on this task. So far I’ve managed to come up with this:

Hello. I’m really stuck on this task. So far I’ve managed to come up with this:

for x in students:
   print students[x]['name']
print students[x]['homework']
print students[x]['quizzes']
print students[x]['tests']

I was able to do it in two for loops

for i in students:
   for x in i:
   print i[x]

Section 3 asks you to “Put It Together” by adding the names of the students into a dictionary (rather than a list):

 students = {
    'Lloyd': [],
    'Alice': [],
    'Taylor': []
 }

That tricky part that really had me stumped was that you can’t leave the values empty – if we have to use a dictionary, we can easily access information in the other dictionaries we’ve already created by referencing them as the values inside ‘students’ like so:

 students = {
    'Lloyd': Lloyd,
    'Alice': Alice,
    'Taylor': Taylor
 }

Now when you make your for loop, you need to reference values which are nested in the key values. My code looked something like this:

for i in students:
   print i
print students[i]['enter name of key values you want to reference']
   ...etc.

Suggestion : 5

In the above program, we have created a dictionary and called a print statement to display the result in the form of a list that contains only values.,In this program, we have created a list and append the new list to the value. In Python dictionary, the append() method is used to insert the element in the given dictionary.,In this program, we will see how to create a dictionary of lists to the dataframe.,By using the list comprehension method we can iterate over all keys of a given dictionary and then use the print statement it will display each key one by one.

Here is the Syntax of the default dict() method

defaultdict(default_factory)

Source Code:

from collections
import defaultdict

my_new_list = [('Micheal', 18), ('George', 91), ('Oliva', 74)]
new_dictionary = defaultdict(list)

for new_k, new_val in my_new_list:
   new_dictionary[new_k].append(new_val)

print("Dictionary of lists", new_dictionary)

Example:

student_info = {
   'Student_id': [85, 47, 49],
   'Student_age': [91, 116, 913]
}

print("values from list1:", student_info['Student_id'])
print("values from second list:", student_info['Student_age'])

Suggestion : 6

values() method returns a view object that displays a list of all values in a given dictionary.,The values() method returns a view object that displays a list of all the values in the dictionary.,The view object values doesn't itself return a list of sales item values but it returns a view of all values of the dictionary.,In this tutorial, we will learn about the Python Dictionary values() method with the help of examples.

Example

marks = {
   'Physics': 67,
   'Maths': 87
}

print(marks.values())

# Output: dict_values([67, 87])

Example

marks = {
   'Physics': 67,
   'Maths': 87
}

print(marks.values())

# Output: dict_values([67, 87])

The syntax of values() is:

dictionary.values()

Example 1: Get all values from the dictionary

# random sales dictionary
sales = {
   'apple': 2,
   'orange': 3,
   'grapes': 4
}

print(sales.values())

Example 2: How values() works when a dictionary is modified?

# random sales dictionary
sales = {
   'apple': 2,
   'orange': 3,
   'grapes': 4
}

values = sales.values()

print('Original items:', values)

# delete an item from dictionary
del[sales['apple']]

print('Updated items:', values)

Suggestion : 7

In the following program, we shall print some of the values of dictionaries in list using keys.,And we know how to access a specific key:value of the dictionary using key.,In the following program, we shall append a dictionary to the list of dictionaries.,In the following program, we shall update some of the key:value pairs of dictionaries in list: Update value for a key in the first dictionary, add a key:value pair to the second dictionary, delete a key:value pair from the third dictionary.

Python Program

myList = [{
      'foo': 12,
      'bar': 14
   },
   {
      'moo': 52,
      'car': 641
   },
   {
      'doo': 6,
      'tar': 84
   }
]

print(myList)

Output

[{
   'foo': 12,
   'bar': 14
}, {
   'moo': 52,
   'car': 641
}, {
   'doo': 6,
   'tar': 84
}]