<｜begin▁of▁sentence｜>### Instruction:
As a cartoonist crafting your next comic strip, you have a MultiDict object storing your character dialogues and expressions. Currently, it holds the exchanges between your characters, with 'spam' appearing multiple times. Now, you're seeking a way to transform all instances of 'spam' to 'ham' seamlessly within your storyline. How can you achieve this transformation using the relevant API provided by your comic creation software?
### Response:
from multidict import MultiDict

# Create a MultiDict object with initial key-value pairs
d = MultiDict([('spam', 'eggs'), ('spam', 'bacon')])

# Set the item 'spam' to a single value 'ham', replacing any existing values
# The previous values associated with 'spam' ('eggs', 'bacon') will be erased

d['spam'] = 'ham'

# Show the current state of the MultiDict object
d
# Output should be: MultiDict([('spam', 'ham')])
print(d)
<|EOT|>
