>>> dict = {}
>>> dict['martin'] = 'Ilse'
>>> dict['iliana'] = 'El del DF' 
>>> dict
{'iliana': 'El del DF', 'martin': 'Ilse'}
>>> del 'martin'
  File "<stdin>", line 1
SyntaxError: can't delete literal
>>> del dict['martin']
>>> dict['otra llave'] = 'otra cosa'
>>> dict
{'otra llave': 'otra cosa', 'iliana': 'El del DF'}
>>> del dict['otra llave']
>>> dict
{'iliana': 'El del DF'}
>>> len(dict)
1