python - 从 Python 列表中删除重复的整数序列

Question

我有一个整数列表，我需要从中删除重复的序列，我正在考虑逻辑。

我一直在尝试修改this到我需要的，但是它只返回一个与重复序列的长度有关的数字，并且它只从起始整数开始计数。

这是目前为止我得到的:

def findRep(rmRepList):
    #Array to hold [starting position, length] of repeating sequences
    repList = []
    #For each industry listed
    for industry in rmRepList:
        #Maximum starting position
        maxStartPos = len(industry)-2
        #For each possible starting point of repetition
        for start in range(1,maxStartPos):
            #Limit on how long the repetition can be
            maxLen = math.ceil((len(industry)-start)/2)

            #For each possible length (2 because already canceled out repeating resources in genAllLoop)
            for i in range(2,maxLen):
                #If the next 'i' integers repeat
                if industry[start:i+start] is industry[i+start:2*i+start]:
                    repList = [start,i]
                    industry = rmRep(repList, industry)

                #If reached end of list
                if 2*i+start+1 == len(industry):
                    #End loop
                    break

def rmRep(rmProp, loop):
    #Sequence of resources to drop
    rmSeq = [loop[rmProp[0]:rmProp[0]+rmProp[1]]]
    #Debugging statement
    print(rmSeq)
    loop.remove(rmSeq)
    return(loop)name = username_entry.get()

rmRepList 是一个列表列表，包含我需要分析的每个列表。

例如，如果给定一个列表

rmRepList = [[0,1,2,1,2,1,0],[0,1,2,1,2,1,2,3,4,5,3,4, 5,6,0]]

我需要它返回 [[0,1,2,1,0], [0,1,2,3,4,5,6,0]]

现在，代码甚至没有到达 rmRep 子例程。我有一种可怕的感觉，我正在做这一切都是错误的。我不喜欢代码中需要这么多循环，尤其是当我必须分析的实际列表有数百位长时。有更简单的方法吗？

---

编辑:如果有帮助，我可以保证列表不会一遍又一遍地重复一个整数(例如 [0,0,0,1,0] 不会发生)。

此外，列表中的第一个和最后一个数字将始终相同。

Answer 1

部分答案:检测您的重复序列。

listA = [0,1,2,1,2,1,2,3,4,5,3,4,5,6,0]
listB = [0,1,2,1,2,1,0]

def get_repeated_seq(seq, start, length):
    ref = seq[start:start+length]
    #print("Ref", ref)
    for pos in range(start+length, len(seq)-length):
        compare = seq[pos:pos+length]
        #print("Pos", pos, compare)
        if compare == ref:
            print("Found", ref, "at", pos)
            return pos
    return False

def get_repeated_seqs(seq):
    for size in reversed(range(2, len(seq)/2)):
        for pos in range(0, len(seq)-size):
            print("Check rep starting at pos %s for size %s" % (pos, size))
            get_repeated_seq(seq, pos, size)

print(get_repeated_seqs(listA))

然后你可以根据你的删除策略(最大？最小？)删除它们

编辑 :要清楚它有效(并同时添加一些删除)

listA = [0,1,2,1,2,1,2,3,4,5,2,1,3,4,5,2,1,6,0]
listB = [0,1,2,1,2,1,0]

def get_repeated_seq(seq, start, length):
    ref = seq[start:start+length]
    #print("Ref", ref)
    for pos in range(start+length, len(seq)-length):
        compare = seq[pos:pos+length]
        #print("Pos", pos, compare)
        if compare == ref:
            #print("Found", ref, "at", pos)
            return pos, length
    return False

def get_repeated_seqs(seq):
    reps = []
    for size in reversed(range(2, len(seq)/2)):
        for pos in range(0, len(seq)-size):
            #print("Check rep starting at pos %s for size %s" % (pos, size))
            rep = get_repeated_seq(seq, pos, size)
            if rep:
                reps.append(rep)
    return reps

def remove_repeated_seqs(seq, reps):
    # need to backup seq ?
    for rep in reps:
        overlaps = False
        for pos in range(rep[0], rep[0]+rep[1]):
            if seq[pos] == "*":
                overlaps = True
        if not overlaps:
            for pos in range(rep[0], rep[0]+rep[1]):
                seq[pos] = "*"
    out = []
    for item in seq:
        if item != "*":
            out.append(item)
    return out


reps = get_repeated_seqs(listB)
rem = remove_repeated_seqs(listB, reps)
#print(rem)
print(rem==[0,1,2,1,0])

reps = get_repeated_seqs(listA)
rem = remove_repeated_seqs(listA, reps)
#print(rem)
print(rem==[0,1,2,3,4,5,6,0])

输出 True 和 True :)

EDIT2:没有 -1 到 for range 循环中列表的末尾..