input: Write a python function to filter employees with a salary greater than 60000.
  assert filter_employees(employees) == [{'name': 'John Smith', 'position': 'Manager', 'age': 43, 'salary': 100000}, {'name': 'David Williams', 'position': 'Software Developer', 'age': 25, 'salary': 80000}, {'name': 'Richard Jones', 'position': 'Accountant', 'age': 41, 'salary': 75000}]
  assert filter_employees([{'name': 'Alice', 'position': 'HR', 'age': 30, 'salary': 55000}, {'name': 'Bob', 'position': 'Designer', 'age': 22, 'salary': 62000}]) == [{'name': 'Bob', 'position': 'Designer', 'age': 22, 'salary': 62000}]
  assert filter_employees([{'name': 'Charles', 'position': 'Analyst', 'age': 35, 'salary': 60000}]) == []
output: def filter_employees(employees):
      return [employee for employee in employees if employee['salary'] > 60000]