input: Write a function to rewrite the given Python code using list comprehensions. The function should take no input and return the rewritten code as a string.
  assert rewrite_code()=="""even_numbers = [i for i in range(1, 21) if i % 2 == 0]"""
  assert rewrite_code()=="""even_numbers = [i for i in range(1, 21) if i % 2 == 0]"""
  assert rewrite_code()=="""even_numbers = [i for i in range(1, 21) if i % 2 == 0]"""
  assert rewrite_code()=="""even_numbers = [i for i in range(1, 21) if i % 2 == 0]"""
  assert rewrite_code()=="""even_numbers = [i for i in range(1, 21) if i % 2 == 0]"""
output: def rewrite_code():
      return "even_numbers = [i for i in range(1, 21) if i % 2 == 0]"