我看了一下你的代码，你似乎遇到了将result作为2D数组使用的陷阱，尽管你只将它定义为1D数组。至少这就是错误输出的生成方式。
这里有一个解决方案，我认为你正在尝试去：

def splitByCity(text,citylist):
    # split text into words
    wordlist = text.split()
    result = []
    # variable for keeping track of last chunk and a counter
    currentChunk = ""
    c = 0
    inWordList = True
    dontPrint = False
    while inWordList == True:
        for city in citylist:
            if (wordlist[c] == city):
                result.append(currentChunk)
                # Get next 4 words ONLY if there are words to spare
                if (len(wordlist) - c - 1) > 4:
                    currentChunk = ''
                    # Change below number from 4 to higher number to increase chunk length of found instances
                    for i in range(4):
                        currentChunk += wordlist[c + i] + " "
                    result.append(currentChunk)
                    c = c + 4
                    currentChunk = ''
                else:
                    dontPrint = True
                    currentChunk = wordlist[c] + ' '
                
        if (dontPrint == False):
            currentChunk += (wordlist[c] + ' ')
        else:
            dontPrint = False
        c = c + 1
        if (len(wordlist) - c) < 2:
            inWordList = False

    currentChunk += wordlist[c]
    result.append(currentChunk)
    
    return result

下面是两个城市的输出代码示例：

text = "Hi I am a highly suspicious official that has come in from Berlin to experience the harsh winters here, not in Moscow though I am a"
citylist = ["Berlin","Moscow"]
print(splitByCity(text,citylist))

输出为：

['Hi I am a highly suspicious official that has come in from ', 'Berlin to experience the ', 'harsh winters here, not in ', 'Moscow though I am a']

我认为对于你的边界情况可能会有一些细微的差异，但我认为无论如何它都应该工作。