#500G, 特殊 一行def myreadlines(f, newline):  buf = ""  while True:    while newline in buf:      pos = buf.index(newline)      yield buf[:pos]      buf = buf[pos + len(newline):]    chunk = f.read(4096)    if not chunk:      #说明已经读到了文件结尾      yield buf      break    buf += chunkwith open("input.txt") as f:    for line in myreadlines(f, "{|}"):        print (line)