python - Iterating over an array and dictionary and storing the values in another array -

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say have dictionary of pattern types:

patterndict = {1:[0],5:[0,3]}

and have array:

a = [[1,3,4,5],[6,7,8,9]]

i have 2 empty arrays store value of each pattern type:

pattern1=[] pattern5=[]

i iterating on each row in , each pattern type in patterndict:

for row in a:     key, value in patterndict.iteritems():         currentpattern = row[value] value in patterndict[key]         #append either pattern1 or pattern5 currentpattern based on key

and having trouble. how append either pattern 1 array or pattern 5 array based on key in patterndict. output like: 

pattern1=[1,6] pattern5=[1,5,6,9]

what's best way this?

use dict instead of variables:

>>> p = {k:[x[y] x in y in v] k, v in patterrndict.iteritems()} >>> p[1] [1, 6] >>> p[5] [1, 5, 6, 9]

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