There are multiple ways to create a dictionary from the list in python. A dict comprehension and zip() function are common and simple to create a dictionary from a list.
Must read: Python make dict from list
Example create a dictionary from the list in Python
Simple example code.
Using dictionary comprehension
A dictionary comprehension is similar to a list comprehension in that both methods create a new value of their respective data types.
keys = ["A", "B", "C"]
values = [1, 2, 3]
res = {keys[i]: values[i] for i in range(len(keys))}
print(res)
Output:
Using zip() Funciton
This is the Most pythonic and generic method to create a dictionary form list. This function pairs the list element with another list element at the corresponding index in form of key-value pairs.
keys = ["A", "B", "C"]
values = [1, 2, 3]
res = dict(zip(keys, values))
print(res)Output: {‘A’: 1, ‘B’: 2, ‘C’: 3}
How do I create a dictionary with keys from a list and default values zero?
Answer: Given key of list a = [1,2,3,4] convert to d = {1:0, 2:0, 3:0, 4:0}
Using dict comprehensions
a = [1, 2, 3, 4]
res = {el: 0 for el in a}
print(res)
Output: {1: 0, 2: 0, 3: 0, 4: 0}
Using dict.fromkeys
a = [1, 2, 3, 4]
res = dict.fromkeys(a, 0)
print(res)
Output: {1: 0, 2: 0, 3: 0, 4: 0}
Do comment if you have any doubts and suggestions on this Python dict list topic.
Note: IDE: PyCharm 2021.3.3 (Community Edition)
Windows 10
Python 3.10.1
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.