how to explain such codes, python's bug or mine?

[Fredrik Lundh]

"MaHahaXixi" <enjoy_linux at hotmail.com> wrote:

> for python, i am a newbie, but i did not found the warning of such usage
> from the python tutorial

    "4.2 for Statements"

    "It is not safe to modify the sequence being iterated over in the loop (this
    can only happen for mutable sequence types, such as lists). If you need
    to modify the list you are iterating over (for example, to duplicate selected
    items) you must iterate over a copy." (followed by an example)

</F>