---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-1-bcae5a697dad> in <module>
----> 1 import namespace_repro.module

~/namespace-repro/src/namespace_repro/module/__init__.py in <module>
----> 1 from namespace_repro.module.x import x

~/namespace-repro/src/namespace_repro/module/x.py in <module>
----> 1 import namespace_repro.module.y as y
      2
      3 x = y.y

AttributeError: module 'namespace_repro' has no attribute 'module'
---------------------------------------------------------------------------

In [1]: import namespace_repro.module.y as y  # This doesn't work.
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-4-4035347ea59b> in <module>
----> 1 import namespace_repro.module.y as y

AttributeError: module 'namespace_repro' has no attribute 'module'

In [2]: import namespace_repro.module.y  # But this one does! Why?

In [3]: dir(namespace_repro.module.y) # The error returns when we actually want to use the module.
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-3-d89bcfd9e509> in <module>
----> 1 dir(namespace_repro.module.y)

AttributeError: module 'namespace_repro' has no attribute 'module'

In [4]: from namespace_repro.module.y import y  # This works fine!

In [5]: y
Out[5]: True

. import-error-repro
+-- setup.py
+-- src
|   +-- namespace_repro
|   |   +-- module
|   |   |   +-- __init__.py
|   |   |   +-- x.py
|   |   |   +-- y.py