发文博客 放几行几天调试的py代码 fd = open("log.txt", 'r') for line in fd: sp_line = line.strip().split('.') new_line = ':'.join(sp_line[:4]) print(new_line) fd.seek(0) for line in fd: #print(line.strip()) re = line.rfind('.') if (re != -1): print(line[:re])