in python What does a dictionary value with a key 'foo' and a value $42$ look like?

Group of answer choices

$[\text{'}$foo$\text{'}$:$42]$

$\{\text{'}$foo$\text{'}$:$42\}$

$\{\text{'}$foo$\text{'},42\}$

$[\text{'}$foo$\text{'},42]$