find takes two arguments, the first being a list and the second being a function. The function must contain the keyword key and must return a bool. The first value found in the list that causes the function to return True will be returned.

def key_fn(key=''):
  return key['name'] == 'Bob'
return find(
  [{'name': 'John'}, {'name': 'Bob'}, {'name': 'Charles'}],
  key_fn) # {'name': 'Bob'}