How to remove None values from a dictionary in Python

In this tutorial, we will be learning the steps to be followed in order to remove None Values from a dictionary in Python. We’ll be using Pycharm IDE to solve this problem. We will be using items() function to detect a None value in the given dictionary.

Creating a Dictionary with Keys and Values

#Create a List
keys = ["Name", "Age", "Country","Nothing"]
#Convet List Into Keys
d = dict.fromkeys(keys)
print(d)

#Give values to required Keys
d['Name']='CodeSpeedy'
d['Age']=18
d['Country']='India'
print(d)

Output:

{‘Name’: None, ‘Age’: None, ‘Country’: None, ‘Nothing’: None}
{‘Name’: ‘CodeSpeedy’, ‘Age’: 18, ‘Country’: ‘India’, ‘Nothing’: None}

For Loop to remove keys with Value as None

items() method is used to return the list with all dictionary keys with values.

We will be using a for loop to check if a value from the dictionary d matches with None. If the condition is true, then we simply delete the key that has None as its value.

#Using a for loop to remove keys with Value as None
for key, value in dict(d).items():
    if value is None:
        del d[key]
print(d)

Complete Code

Here is the complete Python code to remove None values from a dictionary:

#Create a List
keys = ["Name", "Age", "Country","Nothing"]
#Convet List Into Keys
d = dict.fromkeys(keys)
print(d)

#Give values to required Keys
d['Name']='CodeSpeedy'
d['Age']=18
d['Country']='India'
print(d)
#Using a for loop to remove keys with Value as None
for key, value in dict(d).items():
    if value is None:
        del d[key]
print(d)

 

2 responses to “How to remove None values from a dictionary in Python”

1. Carlos says:

   August 26, 2022 at 5:56 pm

   Give back “RuntimeError: dictionary changed size during iteration”

   Reply
   • Anonymous says:

     September 24, 2022 at 9:30 am

     delete_me = []
     for key, value in dict(d).items():
     if value is None:
     delete_me.append(key)
     for key in delete_me:
     del d[key]
     # stupid, but it should work

     Reply