homepage

Sorry for the mistake.
I corrected the pkgB package, but the result is the same:
 jaraco@devjaraco:~$ tree master
 master
 ├── __init__.py
 ├── __init__.pyc
 ├── pkgA
 │  ├── foo.py
 │  ├── foo.pyc
 │  ├── __init__.py
 │  └── __init__.pyc
 └── pkgB
 ├── bar.py
 └── __init__.py
 2 directories, 8 files
 jaraco@devjaraco:~$ python2.7 -c 'import master.pkgA; print("pkgA.__package__ is {}".format(master.pkgA.__package__)); import master.pkgA.foo'
 pkgA.__package__ is None
 Traceback (most recent call last):
 File "<string>", line 1, in <module>
 File "master/pkgA/foo.py", line 2, in <module>
 bar = __import__('pkgB', level=1).bar
 ImportError: No module named pkgB
As you can see, __package__ for pkgA is None. Same is true for master.__package__.