python3 从文件中搜索包含字符串的行

import codecs

FileName = r'c:\ls\1'

#KeyStr = input("the key string: ")

KeyStr = '<dd class="info"><span>执业证号：'

FoundFlag = False
#用utf-8格式打开文件

FileObj = codecs.open(FileName, 'r', 'utf-8')

LineTemp = FileObj.readline()

while LineTemp:

   # print(LineTemp)

   # print(KeyStr)

   # zc = LineTemp.find(KeyStr)

    

    if LineTemp.find(KeyStr) > 0:

        FoundFlag = True

        print("*************************")         

        print("the line is: " + LineTemp, end='')

        print("*************************")

        LineTemp = FileObj.readline()

 #       break

    else:

        LineTemp = FileObj.readline()

FileObj.close()

if FoundFlag == False:

    print("Not found the string!")