打印长字符串后Python空闲速度减慢

IDLE 3.6 。字符串大约有160K字节长,我已经将其保存到机器上的txt文件中。这花了大约一秒钟的时间,所以我想打印也需要同样的时间。。。

我从来没有这么错过。。。

this

我是这样运行的:

with open(location_of_160KB_png_file, "rb") as imageFile:
    f = imageFile.read()
    b = bytearray(f)
    b=''.join([str(bb) for bb in b])
    b[:10]    # this prints easily (on IDLE I don't have to use _print_ function, I can just type the variable name)
    b         # this, however...