In IDLE, Run Module, F5, is a shortcut, in a sense, for saving the file to filename, switching to a terminal or console window, such as Command Prompt on Windows, and entering 'python -i filename'.  The -i means 'switch it interactive mode after running the file'.  When you are done, and close the window, you can switch back to the editor.

The IDLE Shell more-or-less simulates Python's interactive mode.  When you hit F5, a separator line is added, like 
=================== RESTART: F:\Python\a\tem.py =====================
to indicate that Shell reinitialized itself and is now running your program.  This is completely normal and intended.  When your program finishes, Shell will display '>>> '.

Please try to read the IDLE doc, which is available on the Help menu as 'IDLE Help'.  You can ask about using Python and IDLE on python-list.   Always mention the Python version and operating system you are using.

You program has a bug.  In the 'else' section, it tries to print q1 without q1 being defined.

If a program has a severe bug that caused the Python executing your code to crash, Shell will restart with a line that does not have a filename, like
======================== RESTART ========================
This is hard to bring about and is also not an IDLE bug.