<｜begin▁of▁sentence｜>### Instruction:
Given a MultiDict object with the keys 'spam' associated with values 'eggs' and 'bacon', how would you update the key 'spam' to have a single value 'ham', replacing the existing values?
### Response:
from multidict import MultiDict

# Create a MultiDict object with initial values
d = MultiDict([('spam', 'eggs'), ('spam', 'bacon')])

# Set the item 'spam' to a single value 'ham', replacing any existing values associated with 'spam'
d['spam'] = 'ham'

# Print the updated MultiDict
echo = d['spam']
print('Updated value for spam:', echo)
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