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[Q] ImportError by __import__() on Python >= 3.4

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  [Q] ImportError by __import__() on Python >= 3.4 Makoto Kuwata <kwa@kuwata-lab.com> - 2016-06-02 23:04 +0900

#109367 — [Q] ImportError by __import__() on Python >= 3.4

Hi,

I have a trouble around __import__().
The following sample code works well on Python <= 3.3,
but it raises ImportError on Python >= 3.4.


    ## importtest.py
    import sys, os, shutil

    def test(name):
        try:
            ## create 'foo/__init__.py' file
            os.mkdir(name)
            with open(name + "/__init__.py", 'w') as f:
                f.write("X=1")
                f.flush()
            ## ipmort 'foo' module
            mod = __import__(name)
        finally:
            if os.path.isdir(name):
                shutil.rmtree(name)

    test("foo")    # no errors
    test("bar")    # may raise error on Python >= 3.4. Why?


Output Example:

    ### No errors  (Python <= 3.3)
    ubuntu$ export PYTHONPATH=.
    ubuntu$ for x in 1 2 3 ; do /usr/bin/python3.3 importtest.py; done

    ### ImportError (Python >= 3.4)
    ubuntu$ export PYTHONPATH=.
    ubuntu$ for x in 1 2 3 ; do /usr/bin/python3.4 importtest.py; done
    Traceback (most recent call last):
      File "tmp/importtest.py", line 19, in <module>
        test("bar")    # may raise error on Python >= 3.4. Why?
      File "tmp/importtest.py", line 13, in test
        mod = __import__(name)
    ImportError: No module named 'bar'


Please give me any advices or hints.
Thanks.

--
regards,
makoto

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