Python中哈哈哈字符串的简单使用

tempValue = 0


def replaceTextByTable(pageText, headerText, footerText, tableText, preFooterPosition=0):
    headerPosition = pageText.find(headerText, preFooterPosition)
    footerPosition = pageText.find(footerText, preFooterPosition)

    while True:
        # 如果找到的footerPosition在headerPosition前面，重新找下一个footerPosition
        if footerPosition <= headerPosition:
            footerPosition = pageText.find(footerText, footerPosition + 1)
        # 如果找到的前后下标比table的长度长，即找下一个headerPosition
        elif abs(footerPosition - headerPosition + len(footerText) - tempValue) > len(tableText):
            while True:
                tempHeaderPosition = pageText.find(headerText, headerPosition + 1)
                if tempHeaderPosition != -1 and abs(
                        footerPosition - tempHeaderPosition + len(footerText) - tempValue) > len(tableText):
                    headerPosition = tempHeaderPosition
                else:
                    break
        # 如果找到的前后下标比table的长度短，即找下一个footerPosition
        elif abs(footerPosition - headerPosition + len(footerText) - tempValue) < len(tableText):
            while True:
                tempFooterPosition = pageText.find(footerText, footerPosition + 1)
                if tempFooterPosition != -1 and abs(
                        footerPosition - tempFooterPosition + len(footerText) - tempValue) < len(tableText):
                    footerPosition = tempFooterPosition
                else:
                    break
        else:
            break

    oldStr = pageText[headerPosition: footerPosition + len(footerText)]
    newStr = pageText.replace(oldStr, tableText, 1)

    print("-------------------")
    print("ori str:" + pageText)
    print("old str:" + oldStr)
    print("new str:" + newStr)
    print("-------------------")

    return newStr, footerPosition + len(footerText)

    #     # 表格前面字符串在文档中出现的下标数组
    #     headerPositions = getPositions(pageText, headerText)
    #     # 表格最后面的字符串在文档中出现的下标数据
    #     footerPositions = getPositions(pageText, footerText)
    #
    #     # 表格的字符串长度
    #     tableLength = len(tableText)
    #     # gapLength为前后两个下标中间的字符串长度与tableText的长度差，长度差越小说明该前后下标所在的字符串就是需要替换的字符串
    #     minLength = tableLength
    #     # 记录前后两个下标位置
    #     gapHeaderPosition = -1
    #     gapFooterPosition = -1
    #
    #     # 前后下标两两计算长度，与tableText的长度进行比较
    #     for pHeader in headerPositions:
    #         for pFooter in footerPositions:
    #             indexDistance = abs(int(pHeader) - int(pFooter))
    #             # 此处要更新前后两个下标位置，条件是前后两个下标
    #             gap = abs(indexDistance - tableLength)
    #             if gap < minLength:
    #                 minLength = gap
    #                 gapHeaderPosition = pHeader
    #                 gapFooterPosition = pFooter
    #
    #     # 如果找到了合适的前后两个下标，则进行字符串替换操作
    #     if gapHeaderPosition != -1 and gapFooterPosition != -1:
    #         oldStr = pageText[gapHeaderPosition: gapFooterPosition + len(footerText)]
    #         newStr = pageText.replace(oldStr, tableText)
    #         print("oldStr:" + oldStr)
    #         print("originStr:" + pageText)
    #         print("   newStr:" + newStr)
    #         return newStr
    #     else:
    #         return pageText
    #     # print(headerPositions)
    #     # print(footerPositions)
    #
    #
    # def getPositions(pageText, subText):
    #     positions = []
    #     start = 0
    #     while True:
    #         # 查找指定字符串在文档中首次出现的下标
    #         position = pageText.find(subText, start)
    #         # 如果返回值为-1，则代表没有找到，则循环结束
    #         if position == -1:
    #             break
    #         # 如果找到后将下标保存到数组
    #         positions.append(position)
    #         # 重新计算起始查找的下标，+1是从下标后面一个字符串开始查找，否则查询出来会一直是0
    #         start = position + 1
    #     return positions


originStr = "hello word + you. Do you want word + you have word + you?"
newStr1, preFooterPosition1 = replaceTextByTable(originStr, "word", "you", "XXXXXXXXXX")
newStr2, preFooterPosition2 = replaceTextByTable(newStr1, "word", "you", "XXXXXXXXXX", preFooterPosition1)
newStr3, preFooterPosition3 = replaceTextByTable(newStr2, "word", "you", "XXXXXXXXXX", preFooterPosition2)

# replaceTextByTable("hello word, i have a word give you. Do you want have?", "word", "you",
#                    "XXXXXXXXXXXXXXXXXXXXX")  # 2:4
# replaceTextByTable("hello word, i have a word give you. Do you want have?", "word", "you",
#                    "XXXXXXXXXXXXXXXXXXXXXXXXXXXX")  # 1:3
# replaceTextByTable("hello word, i have a word give you. Do you want have?", "word", "you",
#                    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX")  # 1:4