How do you convert a dictionary to a defaultdict

0 votes
What are the advantages of using a defaultdict instead of a regular dictionary?
Jul 2, 2019 in Python by Waseem
• 4,540 points
4,819 views

2 answers to this question.

+1 vote
from collections import defaultdict
a = {1: 2, 2: 3, 3: 4}
d = defaultdict(int,a)
answered Aug 2, 2019 by Mohammad
• 3,230 points
0 votes
Default dictionary can be used when you want the dictionary to return a default value when a value is not present, instead of returning a KeyError.

They have numerous applications, but mostly for convenience. As they would save having to check if a key is present and allowing a value to it if it isn't.
answered Nov 30, 2020 by KP

Related Questions In Python

0 votes
1 answer
0 votes
1 answer

How do you append to a file?

with open("test.txt", "a") as myfile: myfile.write("appended text ...READ MORE

answered Jul 27, 2018 in Python by Priyaj
• 58,100 points
132 views
0 votes
1 answer

How do I convert a Python program to a runnable .exe Windows program?

Understand that every 'freezing' application for Python ...READ MORE

answered Oct 12, 2018 in Python by SDeb
• 13,270 points
476 views
0 votes
1 answer

How do you add a background thread to flask in Python?

The example below creates a background thread ...READ MORE

answered Nov 19, 2018 in Python by Nymeria
• 3,520 points
29,412 views
0 votes
2 answers
+1 vote
2 answers

how can i count the items in a list?

Syntax :            list. count(value) Code: colors = ['red', 'green', ...READ MORE

answered Jul 6, 2019 in Python by Neha
• 330 points

edited Jul 8, 2019 by Kalgi 1,969 views
0 votes
0 answers
+4 votes
6 answers

Lowercase in Python

You can simply the built-in function in ...READ MORE

answered Apr 11, 2018 in Python by hemant
• 5,810 points
1,504 views
0 votes
1 answer

how to convert a group of strings to integer?

a = ['1','2','3','4'] b = list(map(int,a)) print(b) this is how ...READ MORE

answered Mar 18, 2019 in Python by Mohammad
• 3,230 points
132 views