I had various bugs in my GIS softwares (QGIS, ArcGIS) after uninstalling PyCharm from my computer (time limited school license). For a school assignment we had to change the PythonPATH and PythonHOME and after uninstalling the said IDE, some plugins stoped working in QGIS.

I uninstalled the programs, ran CCleaner to remove old registries and just re-installed these:

  • ArcGIS 10.2
  • OSGeo4W (including QGIS Lyon 2.12.3)
  • OpenGeoSuite 4.8 (without QGIS)
  • Python 2.7
  • PyScripter

Now the Processing toolbox and other plugins are corrupted and there is this error message:

AttributeError: 'module' object has no attribute 'openssl_md_meth_names'

Also, when the program starts I have other Python errors.

Impossible to load fTools plugin provokes error when calling classFactory()

(translated from french)

Here's the logfile:

Traceback (most recent call last):
              File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 306, in startPlugin
                plugins[packageName] = package.classFactory(iface)
              File "C:/OSGEO4~1/apps/qgis/./python/plugins\fTools\__init__.py", line 33, in classFactory
                from .fTools import fToolsPlugin
              File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 572, in _import
                mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:/OSGEO4~1/apps/qgis/./python/plugins\fTools\fTools.py", line 52, in <module>
                import doRandom
              File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 572, in _import
                mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSGEO4~1\apps\qgis\python\plugins\fTools\tools\doRandom.py", line 37, in <module>
                import random
              File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 572, in _import
                mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\Python27\Lib\random.py", line 49, in <module>
                import hashlib as _hashlib
              File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 572, in _import
                mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\Python27\Lib\hashlib.py", line 138, in <module>
            AttributeError: 'module' object has no attribute 'openssl_md_meth_names'
  • Did you delete the qgis2 folder (C:\Users\You\.qgis2) before reinstalling? This is where most of your plugins are stored are requires to be manually removed.
    – Joseph
    Feb 19, 2016 at 10:21
  • No, I was not aware of this procedure. I guess it's worth a try. Would you reccomend re-installing the full OSgeo4W bundle?
    – Ninja Tuna
    Feb 19, 2016 at 19:36
  • Remove old QGIS installations from "C:Program Files\" etc. Clean registry. Before reinstalling, remove .qgis2. from User path like Joseph said. You can try QGIS standalone installer.
    – Artec
    Feb 19, 2016 at 20:18
  • @NinjaTuna - If you plan on using Python and various other packages then you could re-install via OSGeo4W but is not required if you just want to use QGIS as a standalone software.
    – Joseph
    Feb 22, 2016 at 11:08
  • @Joseph - I uninstalled OSGeo4W by deleting C:\OSGeo4W64, deleted the qgis2 folder as recommended, restarted the computer before re-installing OSGeo4W but the problem persists. Any other ideas?
    – Ninja Tuna
    Feb 23, 2016 at 20:10

1 Answer 1


Cleaning registries and re-installations did not solve the problem.

I opened C:\Python27\Lib\hashlib.py (the problematic file) in Notepad++ and checked on line 138 (where the problem was specified) and compared it to the same file on an other computer, where QGIS works correctly.

Note: I only edited the python file, not the compiled python file.

I found 2 extra command lines that I commented out (using #) for the code to be like the one on the working computer.

I saved the file, re-opened QGIS and found no error and geoprocessing tool back.

Here are the 2 extra lines that I commented out in case someone else gets a similar problem:

(first line = 133)

    import _hashlib
    new = __hash_new
    __get_hash = __get_openssl_constructor
#    algorithms_available = algorithms_available.union(
#        _hashlib.openssl_md_meth_names)
except ImportError:
    new = __py_new
    __get_hash = __get_builtin_constructor

(last line = 141)

  • 1
    I only have basic python skills so I can't explain in much depth why it worked. I'll keep this thread updated in case further problems arise from editing the code.
    – Ninja Tuna
    Feb 25, 2016 at 15:16
  • New problem arose a few days later. Different error messages, details posted here: gis.stackexchange.com/questions/183095/…
    – Ninja Tuna
    Mar 2, 2016 at 15:53

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