input: Write a function to suggest a valid Python syntax to calculate the sum of two variables using a lambda function.
  
  def suggest_lambda_sum(a, b):
      return f"sum = lambda a, b : a + b\nprint(sum({a},{b}))"
  
  assert suggest_lambda_sum(3, 4)=="sum = lambda a, b : a + b\nprint(sum(3,4))"
  assert suggest_lambda_sum(5, 7)=="sum = lambda a, b : a + b\nprint(sum(5,7))"
  assert suggest_lambda_sum(10, 20)=="sum = lambda a, b : a + b\nprint(sum(10,20))"
  assert suggest_lambda_sum(0, 0)=="sum = lambda a, b : a + b\nprint(sum(0,0))"
  assert suggest_lambda_sum(-1, 1)=="sum = lambda a, b : a + b\nprint(sum(-1,1))"
output: def suggest_lambda_sum(a, b):
      return f"sum = lambda a, b : a + b\nprint(sum({a},{b}))"