Err: multiple statements found while compiling...

Here is my structure

I have 2 imports:

from C_system import*
from Tours import*

class Test:



def method1(self,…):

uses fonctions from C_system

def method2(self,…):

uses fonctions from Tours

When I don’t import from Tours, and don’t use the method2, no problem…
But when I use both simultaneusly, there is the error of multiple statements found…
What is the problem about ?

BTW, no error when I compile programs from Tours directly in the Console instead of importing them.