<human>:  What is a good Python function to use set default dictionary in Python.
<bot>: = value

# Enter the dictionary
dictionary = {"key1": "value1", "key2": "value2"}

# Enter the key
key = "key1"

# Enter the value
value = "value3"

# Calling the function
print((set_default_dict(dictionary, key, value)))

#Example Output
# None

#Remember to inspect code for bugs.