Sudoku solver (in progress)

import console
def columns(Numbers, emptyIndex):
    columnList=[[]]
    for i in range(0,9):
        columnList+=[Numbers[int(9*i)+int(emptyIndex%9)]]
    return columnList

def rows(Numbers, emptyIndex):
    rowsList=[[]]
    rowsList=[Numbers[emptyIndex-emptyIndex%9:(emptyIndex-emptyIndex%9)+9]]
    return rowsList

def blocks(Numbers, emptyIndex):
    block1=[0,1,2,9,10,11,18,19,20]
    block2=[3,4,5,12,13,14,21,22,23]
    block3=[6,7,8,15,16,17,24,25,26]
    block4=[27,28,29,36,37,38,45,46,47]
    block5=[30,31,32,39,40,41,48,49,50]
    block6=[33,34,35,42,43,44,51,52,53]
    block7=[54,55,56,63,64,65,72,73,74]
    block8=[57,58,59,66,67,68,75,76,77]
    block9=[60,61,62,69,70,71,78,79,80]
    if emptyIndex in block1:
        return [Numbers[i]for i in block1]
    if emptyIndex in block2:
        return [Numbers[i]for i in block2]
    if emptyIndex in block3:
        return [Numbers[i]for i in block3]
    if emptyIndex in block4:
        return [Numbers[i]for i in block4]
    if emptyIndex in block5:
        return [Numbers[i]for i in block5]
    if emptyIndex in block6:
        return [Numbers[i]for i in block6]
    if emptyIndex in block7:
        return [Numbers[i]for i in block7]
    if emptyIndex in block8:
        return [Numbers[i]for i in block8]
    if emptyIndex in block9:
        return [Numbers[i]for i in block9]

    return None

def sudokuSolve(Numbers):
    notin=[]
    for i in range(0,80):
        if Numbers[i]==[""]:
                for j in range(1,9):
                    if j not in columns(Numbers,i) and j not in rows(Numbers,i) and j not in blocks(Numbers,i):
                        notin+=[j]
                        notin=set(notin)
                        notin=list(notin)
                if len(notin)==1:
                    Numbers[i]=notin[0]
                    print "Number found: ", notin[0]
                    notin=[]
                else:
                    Numbers[i]=notin
                    print("Multiple possibilities: ", notin)
                    notin=[]

    while any(isinstance(x, list) for x in Numbers) or [""] in Numbers:

        for i in range(0,80):
            if Numbers[i]==[""] or any(isinstance(x,list)for x in Numbers):
                for j in range(1,9):
                    if j not in columns(Numbers,i) and j not in rows(Numbers,i) and j not in blocks(Numbers,i):
                        notin+=[j]
                        notin=set(notin)
                        notin=list(notin)
                if len(notin)==1:
                    Numbers[i]=notin[0]
                    print "Number found: ", Numbers[i]
                    notin=[]
                else:
                    Numbers[i]=notin
                    print"Multiple possibilities: ", notin
                    notin=[]
    return Numbers
print sudokuSolve([[""],2,[""],5,[""],1,4,[""],3,1,[""],3,[""],6,4,[""],[""],7,[""],[""],4,3,[""],[""],[""],5,1,4,[""],[""],[""],[""],[""],5,1,6,[""],6,[""],[""],1,3,[""],4,[""],7,1,[""],[""],4,5,3,[""],2,[""],9,2,1,[""],6,[""],[""],[""],8,7,6,4,3,[""],1,2,[""],[""],[""],[""],[""],7,[""],6,[""],[""]])
"""[5,3,"","",7,"","","","",6,"","",1,9,5,"","","","",9,8,"","","","",6,"",8,"","","",6,"","","",3,4,"","",8,"",3,"","",1,7,"","","",2,"","","",6,"",6,"","","","",2,8,"","","","",4,1,9,"","",5,"","","","",8,"","",7,9])
["","","","","","",6,8,"","","","","",7,3,"","",9,3,"",9,"","","","",4,5,4,9,"","","","","","",8,"",3,"",5,"",9,"",2,"","","","","","","",3,6,9,6,"","","","",3,"",8,7,"","",6,8,"","","","","",2,8,"","","","","","",""])
list(raw_input("Sudoku Solver: Input all numbers in the unsolved sudoku with spacers, commas, and square brackets (yes really)")))"""