searching letters on key and values of a dict

 

>>> c

{'Ambiorix': 'Rodriguez', 'Katherine': 'Maria, 'Rosa: 'Perez'}

>>> [a for  a in  list(c.keys()) if 'k'.lower() in a.lower()]

['Katherine']

>>> [a for  a in  list(c.values()) if 'R'.lower() in a.lower()]

['Rodriguez']