[mark@toy ~/PP2ndEd/dev/examples/Part3/Embed/TestApi/WithPackages]$ python
>>> import pkgdir.testapi
>>> pkgdir.testapi.func('a', 'b')
'ab'

>>> import sys
>>> sys.modules['pkgdir.testapi']
<module 'pkgdir.testapi' from 'pkgdir/testapi.py'>

>>> pkgdir
<module 'pkgdir' from 'pkgdir/__init__.pyc'>
>>> testapi
Traceback (innermost last):
  File "<stdin>", line 1, in ?
NameError: testapi
>>> pkgdir.testapi
<module 'pkgdir.testapi' from 'pkgdir/testapi.py'>
>>> pkgdir.testapi.func
<function func at 80ea370>
>>> pkgdir.testapi.func([1], [2])
[1, 2]

>>> reload(pkgdir.testapi)
<module 'pkgdir.testapi' from 'pkgdir/testapi.pyc'>
>>> reload(sys.modules['pkgdir.testapi'])
<module 'pkgdir.testapi' from 'pkgdir/testapi.pyc'>
>>> pkgdir.testapi.func(1, 2)
3
>>> reload(pkgdir.testapi)
<module 'pkgdir.testapi' from 'pkgdir/testapi.py'>
>>> pkgdir.testapi.func(1, 2)
2

>>> from pkgdir.testapi import func
>>> func(1, 2)
2
>>> reload(pkgdir.testapi)
<module 'pkgdir.testapi' from 'pkgdir/testapi.py'>
>>> pkgdir.testapi.func(1, 2)
3
>>> func(1, 2)
2
>>> from pkgdir.testapi import func
>>> func(1, 2)
3





[mark@toy ~/PP2ndEd/dev/examples/Part3/Embed/TestApi/WithPackages]$ python testapi_c.py
12
change pkgdir/testapi.py now...
32
change pkgdir/testapi.py now...
error
Traceback (innermost last):
  File "testapi_c.py", line 8, in ?
    reload(pkgdir.testapi)
  File "pkgdir/testapi.py", line 15
     return x \ y             # change me
                                          ^
 SyntaxError: invalid token
change pkgdir/testapi.py now...
error
Traceback (innermost last):
  File "testapi_c.py", line 9, in ?
    res = pkgdir.testapi.func(4, 8)
  File "pkgdir/testapi.py", line 15, in func
    return x / 0             # change me
ZeroDivisionError: integer division or modulo
change pkgdir/testapi.py now...
65536





[mark@toy ~/PP2ndEd/dev/examples/Part3/Embed/TestApi/WithPackages]$ python testapi_c_from.py
12
change pkgdir/testapi.py now...
32
change pkgdir/testapi.py now...
error
Traceback (innermost last):
  File "testapi_c_from.py", line 8, in ?
    reload(pkgdir.testapi)                   # still need to reload
  File "pkgdir/testapi.py", line 15
     return x \ y             # change me
                                          ^
 SyntaxError: invalid token
change pkgdir/testapi.py now...
error
Traceback (innermost last):
  File "testapi_c_from.py", line 10, in ?
    res = func(4, 8)
  File "pkgdir/testapi.py", line 15, in func
    return x / 0             # change me
ZeroDivisionError: integer division or modulo
change pkgdir/testapi.py now...
65536