# FIRST CASE: from foo.bar import utils
# ...
Python 3.6.4 |Anaconda, Inc.| (default, Jan 16 2018, 12:04:33)
[GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
# code object from /Users/paloand/Downloads/p_demo/foo/__init__.py
# created '/Users/paloand/Downloads/p_demo/foo/__pycache__/__init__.cpython-36.pyc'
# wrote '/Users/paloand/Downloads/p_demo/foo/__pycache__/__init__.cpython-36.pyc'
import 'foo' # <_frozen_importlib_external.SourceFileLoader object at 0x10e12c2e8>
# code object from /Users/paloand/Downloads/p_demo/foo/bar/__init__.py
# created '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/__init__.cpython-36.pyc'
# wrote '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/__init__.cpython-36.pyc'
# trying /Users/paloand/Downloads/p_demo/foo/bar/service.cpython-36m-darwin.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/service.abi3.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/service.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/service.py
# code object from /Users/paloand/Downloads/p_demo/foo/bar/service.py
# created '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/service.cpython-36.pyc'
# wrote '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/service.cpython-36.pyc'
# trying /Users/paloand/Downloads/p_demo/foo/bar/utils.cpython-36m-darwin.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/utils.abi3.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/utils.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/utils.py
# code object from /Users/paloand/Downloads/p_demo/foo/bar/utils.py
# created '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/utils.cpython-36.pyc'
# wrote '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/utils.cpython-36.pyc'
import 'foo.bar.utils' # <_frozen_importlib_external.SourceFileLoader object at 0x10e149fd0>
import 'foo.bar.service' # <_frozen_importlib_external.SourceFileLoader object at 0x10e149cf8>
import 'foo.bar' # <_frozen_importlib_external.SourceFileLoader object at 0x10e149a58>
# trying /Users/paloand/Downloads/p_demo/foo/bar/sdk.cpython-36m-darwin.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/sdk.abi3.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/sdk.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/sdk.py
# code object from /Users/paloand/Downloads/p_demo/foo/bar/sdk.py
# created '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/sdk.cpython-36.pyc'
# wrote '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/sdk.cpython-36.pyc'
import 'foo.bar.sdk' # <_frozen_importlib_external.SourceFileLoader object at 0x10e149b00>
SDK


# SECOND CASE: import foo.bar.utils as utils

# ...
Python 3.6.4 |Anaconda, Inc.| (default, Jan 16 2018, 12:04:33)
[GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
# code object from /Users/paloand/Downloads/p_demo/foo/__init__.py
# created '/Users/paloand/Downloads/p_demo/foo/__pycache__/__init__.cpython-36.pyc'
# wrote '/Users/paloand/Downloads/p_demo/foo/__pycache__/__init__.cpython-36.pyc'
import 'foo' # <_frozen_importlib_external.SourceFileLoader object at 0x1103c02e8>
# code object from /Users/paloand/Downloads/p_demo/foo/bar/__init__.py
# created '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/__init__.cpython-36.pyc'
# wrote '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/__init__.cpython-36.pyc'
# trying /Users/paloand/Downloads/p_demo/foo/bar/service.cpython-36m-darwin.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/service.abi3.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/service.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/service.py
# code object from /Users/paloand/Downloads/p_demo/foo/bar/service.py
# created '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/service.cpython-36.pyc'
# wrote '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/service.cpython-36.pyc'
# trying /Users/paloand/Downloads/p_demo/foo/bar/utils.cpython-36m-darwin.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/utils.abi3.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/utils.so
# trying /Users/paloand/Downloads/p_demo/foo/bar/utils.py
# code object from /Users/paloand/Downloads/p_demo/foo/bar/utils.py
# created '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/utils.cpython-36.pyc'
# wrote '/Users/paloand/Downloads/p_demo/foo/bar/__pycache__/utils.cpython-36.pyc'
import 'foo.bar.utils' # <_frozen_importlib_external.SourceFileLoader object at 0x1103ddf28>
Traceback (most recent call last):
  File "entry.py", line 1, in <module>
    from foo.bar.sdk import get_sdk
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 941, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/paloand/Downloads/p_demo/foo/bar/__init__.py", line 1, in <module>
    from .service import Service
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/paloand/Downloads/p_demo/foo/bar/service.py", line 3, in <module>
    import foo.bar.utils as utils
AttributeError: module 'foo' has no attribute 'bar'