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ankostis opened this issue Jun 19, 2017 · 5 comments
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Upgrading PyTables from PyPi proceeds but the DLL is not working on WinPython-3.6.1 #543

ankostis opened this issue Jun 19, 2017 · 5 comments

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@ankostis
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ankostis commented Jun 19, 2017 •
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Hi @stonebig, my apologies if this is a well-known issue in general:

The PyTables project pushes also Windows binary wheels into PyPi
but when I try to upgrade to them, the resulting package is non-functional, at least on WinPython-3.6.1:

$ pip install tables
Collecting tables
  Downloading tables-3.4.0-cp36-cp36m-win_amd64.whl (2.5MB)
    100% |████████████████████████████████| 2.5MB 199kB/s
Requirement already satisfied: numpy>=1.8.0 in d:\apps\winpython-64bit-3.6.1.0qt5\python-3.6.1.amd64\lib\site-packages (from tables==v3.4.0)
Requirement already satisfied: six in d:\apps\winpython-64bit-3.6.1.0qt5\python-3.6.1.amd64\lib\site-packages (from tables==v3.4.0)
Requirement already satisfied: numexpr>=2.5.2 in d:\apps\winpython-64bit-3.6.1.0qt5\python-3.6.1.amd64\lib\site-packages (from tables==v3.4.0)
Installing collected packages: tables
Successfully installed tables-3.4.0

$ python -c 'import tables'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "D:\Apps\WinPython-64bit-3.6.1.0Qt5\python-3.6.1.amd64\lib\site-packages\tables\__init__.py", line 74, in <module>
    ' that it can be found in the system path' % hdf5_dlls)
ImportError: Could not load any of ['hdf5.dll', 'hdf5dll.dll'], please ensure that it can be found in the system path

But if I use Gohlke's unofficial, it works fine.

Inside the installed packages, in both cases, the DLLs exist, but they are different:

## Gohlke's unofficial:
$ sha256sum.exe */d/apps/winpython-64bit-3.6.1.0qt5/python-3.6.1.amd64/lib/site-packages/tables/hdf5.dll
5eb2c58ff1383cfeebbb9889bd30a8b8aa8829297a0716d914cce4f410c58c21 */d/tmp/PyTablesPACKAGE-WinPy3.6.1-3.4.2/tables/hdf5.dll
(
## From PyPi:
$ sha256sum.exe /d/tmp/PyTablesPACKAGE-WinPy3.6.1-3.4.2/tables/hdf5.dll
5eb2c58ff1383cfeebbb9889bd30a8b8aa8829297a0716d914cce4f410c58c21 */d/tmp/PyTablesPACKAGE-WinPy3.6.1-3.4.2/tables/hdf5.dll

So the problem is that the DLLs are incombatible.

Why is that?
@cgohlke
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cgohlke commented Jun 19, 2017

The official PyTables wheels are broken (missing DLL).

@ankostis
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ankostis commented Jun 20, 2017 •
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At least for 3.4.2, the DLLs are included in the officially released wheel in the same path as yours: tables-3.4.2-cp36-cp36m-win_amd64.whl: tables-3.4.2.data\data\Lib\site-packages\tables\:

- Gohlke: (SHA256: c0c55af4ba5b043ac191c15e166b1937)
  - hdf5.dll    3,025,408   08/05/2017 22:54    5148f434cddb64087591173333200297
  - libbz2.dll  61,440      09/09/2015 21:03    a2a844547083f494b3e2845681ef6392

- PyPiRepo (SHA256: 6671dc33324a07f4497695c7c8767544)
  - hdf5.dll    2,284,544   20/07/2016 19:28    SHA256: 5eb2c58ff1383cfeebbb9889
  - bzip2.dll   177,152	    24/05/2016 20:05    SHA256: 30ffd3863d2ce2a0ee4c76a1

Could it be something else?

@cgohlke
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cgohlke commented Jun 20, 2017 •
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The hdf5.dll in the official pytables distribution depends on zlib.dll, which is not distributed.

@ankostis ankostis mentioned this issue Jun 21, 2017
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@ankostis
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Thanks, opened issue #635 on PyTables project for this.

@tomkooij
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Thanks @ankostis and @cgohlke for spotting this.

@stonebig stonebig closed this as completed May 4, 2025
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@cgohlke @ankostis @stonebig @tomkooij