Swap Variables

'''
You are given a dictionary with two keys a and b that hold integers as their values.

Without declaring any other variable, swap the value of a with the value of b and vice versa.

Note: Return the dictionary after editing it.
'''

def swap_values(numbers):
  d = numbers


  d['a'] = d['a'] + d['b']
  d['b'] = d['a'] - d['b']
  d['a'] = d['a'] - d['b']
  return d