Installing PyQt5 and pyqtgraph via PyPi on Python 3.5 leads to ImportError?

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Mar 13, 2017, 2:52:19 PM3/13/17

to pyqtgraph

Hi,

I am having trouble installing pyqtgraph via PyPi. I did the following:

- created a clean anaconda environment with Python 3.5 (3.5.3)

- installed PyQt5 (5.8.1) via pip. importing PyQt5 from the python prompt worked correctly.

- installed pyqtgraph (0.10.0) via pip.

- importing pyqtgraph from a python prompt results in an ImportError:

Any idea what might have gone wrong?

Is this procedure not the recommended way of installing pyqtgraph?

(test) C:\Users\vandewin>python

Python 3.5.3 |Continuum Analytics, Inc.| (default, Feb 22 2017, 21:28:42) [MSC v.1900 64 bit (AMD64)] on win32

Type "help", "copyright", "credits" or "license" for more information.

>>> import pyqtgraph

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

File "C:\Users\vandewin\AppData\Local\Continuum\Anaconda2\envs\test\lib\site-packages\pyqtgraph\__init__.py", line 13, in <module>

from .Qt import QtGui

File "C:\Users\vandewin\AppData\Local\Continuum\Anaconda2\envs\test\lib\site-packages\pyqtgraph\Qt.py", line 153, in <module>

from PyQt5 import QtGui, QtCore, QtWidgets, uic

ImportError: DLL load failed: The specified module could not be found.

unread,

Mar 13, 2017, 3:54:15 PM3/13/17

to pyqtgraph

Nevermind, the problem lies with the PyQt5 wheel for python 3.5, not with pyqtgraph.

the successful test:

import PyQt5

was a false positive.

from PyQt5 import QtCore

fails, hence indicating it has nothing to do with pyqtgraph.

unread,

Mar 15, 2017, 10:30:35 AM3/15/17

to pyqtgraph

Apparently, the root cause of the problem is not with PyQt5, but with the Anaconda environment, missing python3.dll:

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