How to use list comprehension to add an element to copies of a dictionary?

Question

given:

template = {\'a\': \'b\', \'c\': \'d\'}
add = [\'e\', \'f\']
k = \'z\'

I want to use list comprehension to generate

Answer 1

[dict(template,z=value) for value in add]

or (to use k):

[dict(template,**{k:value}) for value in add]