Python: Append a list to an existing list assigned to a key in a dictionary? -

lets have dict key= 'keys'

>>> keys 'taste' 

after few lines..output

>>> {'taste': ('sweet', 'sour', 'juicy', 'melon-like')} 

this code snippet

from collections import defaultdict agent=defaultdict(str) key_list=[]  key_list=[(keys,tuple(key_list))] agent=dict(key_list) #agent[keys]+=key_list 

what want know is, there way lets have agent= {'taste': ('sweet', 'sour', 'juicy', 'melon-like')}

i want add list

key_list=['yuck!','tasty','smoothie'] 

and agent.setdefault('taste',[]).append(key_list)

and have output like:

 {'taste': ('sweet', 'sour', 'juicy', 'melon-like','yuck!','tasty','smoothie')} 

instead of

{'taste': ('sweet', 'sour', 'juicy', 'melon-like',['yuck!','tasty','smoothie'])} 

is there way that?

inshort:

1. i want add list existing list,which value key in dictionary (w/o iterations find particular key)
2. check if element being fed in list contains element in list value particular key, 'taste' here (could string, here)

check out:

>>> tst =  {'taste': ('sweet', 'sour', 'juicy', 'melon-like')} >>> tst.get('taste', ()) #default () if not exist.   ('sweet', 'sour', 'juicy', 'melon-like') >>> key_list=['yuck!','tasty','smoothie'] >>> tst['taste'] = tst.get('taste') + tuple(key_list) >>> tst {'taste': ('sweet', 'sour', 'juicy', 'melon-like', 'yuck!', 'tasty', 'smoothie')} 

to retrieve,

>>> tst = {'taste': ('sweet', 'sour', 'juicy', 'melon-like', 'yuck!', 'tasty', 'smoothie')} >>> taste = tst.get('taste') >>> taste ('sweet', 'sour', 'juicy', 'melon-like', 'yuck!', 'tasty', 'smoothie') >>> 'sour' in taste true >>> 'sour1' in taste false