Python interactive shell running copy.py on current directory? -

i have script named copy.py on current directory following content:

#!/usr/bin/env python3  print("ahoy, matey!") 

if run python interactive shell , action raise exception (e.g. referring non-existent variable), surprise, sentence "ahoy, matey!" got printed.

when rename copy.py script else, e.g. script.py, no longer behaves that. question is, why interactive shell have call copy.py on error? behavior expected and/or documented somewhere?

thanks!

when python imports module, module search path order is:

• the directory containing input script (or current directory).
• pythonpath (a list of directory names, same syntax shell variable path).
• the installation-dependent default.

now, when raising exception, python runs specific code. code tries import copy python module instead import module , print string in it. why shouldn't use names names of standard python modules.