searching words on a list

 >>> words

['Ambiorix', 'RODRIGUEZ', 'Placencio', 42, 'AMIGo']

>>> [a for a in words if 'pl' in str(a).lower()]

['Placencio']

>>> [a for a in words if 'amb' in str(a).lower()]

['Ambiorix']

>>> [a for a in words if str(a).lower()=='amigo']

['AMIGo']

>>> l

[2.4, 3, 4, 'amigo', 'Rosa', 'Maria']

>>> [a for a in l if str('ro'.lower()) in str(a).lower()]