python - Nested dict comprehension -

in following code,

[{word: score_tweet(tweet) word in tweet} tweet in tweets] 

i getting list of dicts:

[{u'soad': 0.0, u'<3': 0.0}, {u'outros': 0.0, u'acredita': 0.0}] 

i obtain 1 flat dict like:

{u'soad': 0.0, u'<3': 0.0, u'outros': 0.0, u'acredita': 0.0} 

how should change code? note: using python 2.7.

{word: score_tweet(tweet) tweet in tweets word in tweet}