PyQt5 error “PyCapsule_GetPointer called with incorrect name”

问题

I've just built PyQt5 in a pyenv virtualenv with python 3.6.3 on OpenSUSE leap, the build went fine, but when I import

>>> from PyQt5 import QtCore
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: PyCapsule_GetPointer called with incorrect name

I can import PyQt5, but then I cannot use the modules under it

>>> import PyQt5
>>> PyQt5.QtCore
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'PyQt5' has no attribute 'QtCore'

I've read here that the cause could be another sip on the system for example of a PyQt4 installation, I tried to uninstall PyQt4 from the package manager but it didn't help.

I have no idea what to do, any ideas?

If I install the python3-qt5 package and use the system python it works

Edit:

I had the same problem with PyQt4 on another machine on OpenSUSE Leap 15, the solution was to configure sip with:

python configure.py --sip-module PyQt4.sip --no-dist-info --no-tools

as stated in the PyQt4 doc

回答1:

OK so this was pretty easy actually, as stated in the doc (PyQt4, PyQt5), SIP must be configured with the --sip-module option, so for PyQt5 I did:

python configure.py --sip-module PyQt5.sip --no-tools

and for PyQt4:

python configure.py --sip-module PyQt4.sip --no-tools

This applies for PyQt >= 4.12.2 and PyQt >= 5.11

回答2:

Is your application importing both PyQt4 and 5?

I've seen the first error on windows with this:

Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
Executable: D:\Python37\python.exe
>>> from PyQt5 import QtWidgets
>>> from PyQt4 import QtGui, QtCore
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: PyCapsule_GetPointer called with incorrect name

回答3:

I downgraded the PyQt5 to 5.7.1 and it worked for me.

回答4:

So for me the this error occured when I tried to use pyuic5.

In my case I just had to activate my virtual_environment and then it worked.

回答5:

For posterity, I had this error for quite a while in my PyQt5 application because I was using two custom libraries (libArcus and libSavitar) that also use SIP to compile Python bindings. This was eventually fixed by making sure that my custom libraries (using a newer SIP version) were imported first, before PyQt5:

https://github.com/Ultimaker/Cura/blob/b20a349b4454d08e34b3c3ea3f537a380e4c7696/cura_app.py#L140-L141

This worked. However when running the application through PyCharm's debugger I still got the same error. Today I figured out that PyCharm has an option to "enable PyQt5 compatibility" with a certain PyQt5 version. Disabling this option under Settings -> Debugger -> PyQt compatible fixed this.

来源：https://stackoverflow.com/questions/51693993/pyqt5-error-pycapsule-getpointer-called-with-incorrect-name