This is snippet to import my module; myTestModule.py and import-myTestModule.py were saved on same directory.

import-myTestModule.py

#!/usr/bin/env python
# coding: utf-8
# tested by Python 3.4.3 on Windows 8.1
# Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:43:06) [MSC v.1600 32 bit (Intel)] on win32

'''
If you does NOT create .pyc file, run python.exe with -B option or
set non-empty value on PYTHONDONTWRITEBYTECODE, environment variable.

Ref.
https://docs.python.org/3/using/cmdline.html#cmdoption-B
https://docs.python.org/3/using/cmdline.html#envvar-PYTHONDONTWRITEBYTECODE
'''
import myTestModule

def main():
    A1 = myTestModule.A()
    print("{0}: myTestModule.A.str1 on main()".format(myTestModule.A.str1))
    print("{0}: A1.str1 on main()".format(A1.str1))
    print("{0}: A1.str2 on main()".format(A1.str2))
    A1.a()

    print('')

    # https://docs.python.org/3/library/functions.html#vars
    # p.124 6.3.4 名前空間の参照, ”Python文法詳解", O'REILLY
    print("vars(myTestModule):")
    for key in vars(myTestModule): print(' ', key)
    print("vars(myTestModule.A):")
    for key in vars(myTestModule.A): print(' ', key)
    print("vars(A1):")
    for key in vars(A1): print(' ', key)

    A1.b()

if __name__ == '__main__':
    main()

myTestModule.py

#!/usr/bin/env python
# coding: utf-8
# tested by Python 3.4.3 on Windows 8.1
# Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:43:06) [MSC v.1600 32 bit (Intel)] on win32

class A():
    str1 = 'test1'
    __str3 = 'test3'
    list1 = [
        'list1-1',
        'list1-2',
        'list1-3'
    ]

    def __init__(self):
        self.str2 = 'test2'

    def a(self):
        print("{0}: A.str1 on a()".format(A.str1))
        print("{0}: str2 on a()".format(self.str2))

    def b(self):
        print("vars(self) on b():")
        for key in vars(self): print(' ', key)

result_import-myTestModule.py.txt

$>c:\Python34\python.exe -B import-myTestModule.py
test1: myTestModule.A.str1 on main()
test1: A1.str1 on main()
test2: A1.str2 on main()
test1: A.str1 on a()
test2: str2 on a()

vars(myTestModule):
  __builtins__
  __file__
  __name__
  __doc__
  __package__
  __spec__
  A
  __cached__
  __loader__
vars(myTestModule.A):
  _A__str3
  __doc__
  a
  str1
  list1
  __weakref__
  __dict__
  b
  __module__
  __init__
vars(A1):
  str2
vars(self) on b():
  str2