python 查找文件

def work(start="",end="",fp=""):
    if not start or not end or not fp:
        return
    
    str_lst = []
    has_start = False
    for line in open(fp):
        if line.find(start) != -1:
            str_lst.append(line)
            has_start = True
        elif has_start and line.find(end) != -1:
            str_lst.append(line[:line.index(end)])
            has_start = False
            return "".join(str_lst)
        elif has_start:
            str_lst.append(line)
    
    return "".join(str_lst)
        
        



def main():
    """This is main method"""
    start = "-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*angela"
    end = "-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*-=+&*"
    fp = "temp.txt"
    s = work(start,end,fp)
    print s

if __name__=='__main__':
    main()