Initialize Dictionary Python with 0
There, are different methods to initialize a dictionary in Python with the 0 value. Below we are explaining all the possible approaches with practical implementation.
- Using Assignment
- Using a For Loop
- Using Dictionary Comprehension
- Using dict.fromkeys() Method
- Using defaultdict (Collections Module)
Dictionary Initialize with Zero Value
Here, we initialize the dictionary with direct zero values and then print using the print function.
Python3
# Input dictionary with zero values input_dict = { 'Algorithms' : 0 , 'Data Structures' : 0 , 'Python' : 0 , 'Machine Learning' : 0 } #Print Output print (input_dict) |
Output :
{'Algorithms': 0, 'Data Structures': 0, 'Python': 0, 'Machine Learning': 0}
Set all Dictionary Values to 0 using a For Loop
In this example, we use the loop to initialize the dictionary with 0 values. Initially, we took the input_dict with non-zero values and then we copied the input_dict dictionary and reset all values to 0 using a For loop. After resetting the values, we store them in the output_dict object and print them as output.
Python3
# Input dictionary with non-zero values input_dict = { 'Algorithms' : 10 , 'Data Structures' : 15 , 'Python' : 8 , 'Machine Learning' : 5 } # Setting initial values output_dict = input_dict.copy() # Resetting values to 0 for key in output_dict: output_dict[key] = 0 #Print Output print (output_dict) |
{'Algorithms': 0, 'Data Structures': 0, 'Python': 0, 'Machine Learning': 0}
Set all dictionary values to 0 Using Dictionary Comprehension
In this example, we are using the Dictionary Comprehension, where we have taken the input_dict with non-zero values, later we have created output_dict on which the Dictionary Comprehension is applied that resets the non-zero values to the 0 values.
Python3
# Input dictionary input_dict = { 'Algorithms' : 10 , 'Data Structures' : 15 , 'Python' : 8 , 'Machine Learning' : 5 } # Setting initial values output_dict = input_dict.copy() # Resetting values to 0 using comprehension output_dict = {key: 0 for key in output_dict} # Print Output print (output_dict) |
{'Algorithms': 0, 'Data Structures': 0, 'Python': 0, 'Machine Learning': 0}
Initialize Dictionary Python Using dict.fromkeys() Method
In this example, we are using the dict.fromkeys() method to reset all the values to 0. The dict.fromkeys() method is used to create a new dictionary with specified keys, each initialized to a default value. This method created an output_dict dictionary and initialized all values to 0.
Python3
# Create a dictionary input_data = { 'Algorithms' : 10 , 'Data Structures' : 15 , 'Python' : 8 , 'Machine Learning' : 5 } # Setting initial values output_dict = input_data .copy() # Resetting values to 0 using fromKeys method output_dict.update( dict .fromkeys(output_dict, 0 )) #Print output print (output_dict) |
{'Algorithms': 0, 'Data Structures': 0, 'Python': 0, 'Machine Learning': 0}
Initialize Dictionary Python Using defaultdict (Collections Module)
In this example, we are using defaultdict from the Collections Module to initialize a dictionary output_dict with default values of 0 for unspecified keys. USing the update method the value is been reset from non-zero to 0 and printed using the print method in Python.
Python3
# Importing defaultdict from collections import defaultdict # Input dictionary input_data = { 'Algorithms' : 10 , 'Data Structures' : 15 , 'Python' : 8 , 'Machine Learning' : 5 } # Setting initial values output_dict = defaultdict( int , input_data) # Resetting values to 0 using defaultdict output_dict.update({key: 0 for key in output_dict}) # Print Output print ( dict (output_dict)) |
{'Algorithms': 0, 'Data Structures': 0, 'Python': 0, 'Machine Learning': 0}
Conclusion
In conclusion, initializing a dictionary in Python with 0 as its default value provides a convenient and efficient way to manage key-value pairs, especially when dealing with numeric data or counting occurrences. By setting the default value to 0, you create a foundation for incrementing values based on keys without the need for explicit checks or error handling.
Initialize Dictionary Python with 0
This article will show how we can initialize a Dictionary in Python with 0 values. We will see various methods to initialize the value as 0. Below is an example for understanding the problem statement.
Example:
In the below example, we have an input dictionary with keys and values. The values are non-zero which we will initialize to 0 using different approaches or methods.
Input = {'Algorithms': 10, 'Data Structures': 15, 'Python': 8, 'Machine Learning': 5}
Output = {'Algorithms': 0, 'Data Structures': 0, 'Python': 0, 'Machine Learning': 0}