input: Write a function to debug and correct the given Python code for calculating the sum of elements in a list. The code may contain syntax errors, logical errors, or scope issues.
  
  def sum_list(list):
      sum_list = 0
      for num in list:
          sum_list += num
      return sum_list
  
  assert sum_list([1, 2, 3, 4])==10
  assert sum_list([-1, -2, -3, -4])==-10
  assert sum_list([])==0
  assert sum_list([10])==10
  assert sum_list([5, -5, 10, -10])==0
output: def sum_list(input_list):
      total_sum = 0
      for num in input_list:
          total_sum += num
      return total_sum