IDLE "Codepage" Switching?

[Stephen Tucker]

I have four questions.

1. Can anybody explain the behaviour in IDLE (Python version 2.7.10)
reported below? (It seems that the way it renders a given sequence of bytes
depends on the sequence.)

2. Does the IDLE in Python 3.x behave the same way?

3. If it does, is this as it should behave?

4. If it is, then why is it as it should behave?
==============================
>>> mylongstr = ""
>>> for thisCP in range (157, 169):
        mylongstr += chr (thisCP) + " "


>>> print mylongstr
ﾝ ﾞ ﾟ ﾠ ﾡ ﾢ ﾣ ﾤ ﾥ ﾦ ﾧ ﾨ
>>> mylongstr = ""
>>> for thisCP in range (158, 169):
        mylongstr += chr (thisCP) + " "


>>> print mylongstr
ž Ÿ   ¡ ¢ £ ¤ ¥ ¦ § ¨
>>> mylongstr = ""
>>> for thisCP in range (157, 169):
        mylongstr += chr (thisCP) + " "


>>> print mylongstr
ﾝ ﾞ ﾟ ﾠ ﾡ ﾢ ﾣ ﾤ ﾥ ﾦ ﾧ ﾨ
==============================

Stephen Tucker.