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pyuic5 - ModuleNotFoundError: No module named PyQt5.sip

I have just installed Anaconda 5.2 with Python 3.6 on my windows system. Also installed pyqt5 and pyqt5-tools via pip with administrator privilege. Now when I run pyuic5.exe for converting ui files it shows following error:
Traceback (most recent call last):
File "C:\Users\AshfaqurRahman\Anaconda3\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "C:\Users\AshfaqurRahman\Anaconda3\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Users\AshfaqurRahman\AppData\Roaming\Python\Python36\site-packages\PyQt5\uic\pyuic.py", line 26, in <module>
from PyQt5 import QtCore
ModuleNotFoundError: No module named 'PyQt5.sip'
I have tried installing PyQt5-sip package using pip. Buts its already installed in my system.
Why this problem is occurring? How can I solve this problem?

According to Agile_Eagle's suggestion from the comments I just uninstalled pyqt5 and pyqt5-tools packages and the reinstalled them. Problem solved!
PS.: If you still got problems with PyQt, try uninstalling all of the PyQt related libraries:
pip uninstall PyQt5
pip uninstall PyQt5-sip
pip uninstall PyQtWebEngine
Then install them again, this will fix:
ModuleNotFoundError: No module named 'PyQt5.sip'
ModuleNotFoundError: No module named 'PyQt5.QtWebEngineWidgets'
PPS.:If you got problems uninstalling the libraries, go to your Python folder, like C:\Users\<USERNAME>\AppData\Local\Programs\Python\Python<PYTHON-VERSION>\Lib\site-packages and manually delete the PyQt folders, then uninstall everything and install again (Make sure you have the latest Python version and upgraded your pip too)

As of June 2019, pyqt5-tools no longer exists.
The solution I found was first installing pyqt5-sip and then install pyqt5
$ pip install pyqt5-sip
$ pip install pyqt5
This seems to get rid of the following error: ModuleNotFoundError: No module named 'PyQt5.sip'

None of the answers above worked for PyQt5 5.13.0 on conda's python 3.6.
With pyqt5 and pyqt5-sip installed just go into python's site-packages and copy sip.so from the PyQt5_sip package to PyQt5 folder (or make a symlink) where the rest of Qt's so modules are.
Seems like a poor decision to pull sip out into a separate package.

I am a Mac user and I had faced a similar issue.
However, I understand for window users, what you are looking for is pyuic5.bat and not pyuic5.sip
It seems you'll simply have to provide the full path of the pyuic file(for me, it was under a hidden folder usr in the home directory: /usr/local/Cellar/pyqt/5.10.1_1/bin/pyuic5) and do make sure on your terminal(for you, cmd) you have the directory changed to where the *.ui file lies which you wish to convert to a *.py file.
So for instance, if you have a Qt designer file saved by the name untitled.ui on your desktop, put in the following command in your terminal:
Amars-MacBook-Pro:Desktop amaradak$ /usr/local/Cellar/pyqt/5.10.1_1/bin/pyuic5 -x untitled.ui -o untitled.py
Hope this helps...
Cheers

I am also a MAC user, but found adding the code below fixed my problem with "no module named sip":
from PyQt5.QtCore import QCoreApplication

On windows py3.10 with fresh venv it's throwing `No module named 'PyQt5.sip'.
pyqt5-sip is at version 12.9.1. After updating it (pip install pyqt5-sip -U) to version 12.11.0 it isn't throwing anymore.

After a clean install of OpenCV via pip it throws an ImportError: DLL load failed

After installing OpenCV via pip on Windows 10 with:
pip install opencv-python
I can not import the module. When executing the command:
import cv2
I get the error:
File "C:\ProgramData\Anaconda3\lib\site-packages\cv2__init__.py",
line 7, in
from . import cv2
ImportError: DLL load failed:...
If I look into the file throwing the code, it looks like the following:
import sys
import os
# FFMPEG dll is not found on Windows without this
os.environ["PATH"] += os.pathsep + os.path.dirname(os.path.realpath(__file__))
from . import cv2
sys.modules['cv2'] = cv2
So I guess it is ffmpeg which is missing. Thus I installed ffmpeg like described here: http://www.wikihow.com/Install-FFmpeg-on-Windows
Thus, ffmpeg is in my path. However, the error message still occurs. I also tried to install the ffmpeg via pip with
pip install ffmpeg-normalize
But this did not help either.

The opencv-python Windows packages ship with FFmpeg by default. You can have a look at C:\ProgramData\Anaconda3\lib\site-packages\cv2 and you should find FFmpeg DLL there. You don't have to install it separately.
The real problem lies most probably in Anaconda because they are not shipping python3.dll with their distribution. This is required by PEP 384. Related Anaconda issue is here: https://github.com/ContinuumIO/anaconda-issues/issues/1394
To fix this, you will have to copy python3.dll from a CPython installer package and place it to PATH. The CPython version must match your Anaconda version. Easiest way is to copy the file to some place which is already in PATH. This could be for example C:\Anaconda3 if that's where your Anaconda installation is located.
If the above does not work, make sure that you have Visual C++ redistributable 2015 installed: https://www.microsoft.com/en-us/download/details.aspx?id=48145

ImportError in Python

I tried to execute a program using geonames_rdf, but I cant execute it by this error:
Traceback (most recent call last):
File "geo1.py", line 13, in <module>
import geonames.config.log
ImportError: No module named config.log
I read several posts abot ImportError and I check the path of the system and it is correct. I'm working in a VirtualBox with a fresh Ubuntu 16.04.
The imports of my program are:
import sys
import os
import os.path
import logging
import geonames.config.log
import geonames.compat
import geonames.adapters.search
I've also tried add this line:
sys.path.append('/usr/local/lib/python2.7/dist-packages/geonames/')
The command that I used to instal this package was
sudo pip install geonames_rdf

Try appending site-packages not dist-packages. A bit of searching it looks like dist-packages is debian specific.
sys.path.append('/usr/local/lib/python2.7/site-packages/geonames/')
Reason:
Since you're installing 3rd party python package via pip it will not go into dist-packages and python rightfully cannot find it on the path.
Reference link:
What's the difference between dist-packages and site-packages?

I just tried to use geonames_rdf, but I didn't know I needed it to do a geonames search so I installed geonames first, then discovered I had to install fiona and gdal (I'm on Windows, had to install these two using prebuilt whl from http://www.lfd.uci.edu/~gohlke/pythonlibs/). Don't know why these dependencies aren't baked into geonames.
Anyway once I then installed geonames_rdf it seemed to install into the geonames folder in c:\Python27\lib\site-packages, added at least the adapters package. In c:\Python27\lib\site-packages\geonames there is a config folder with log.py in it.

How to fix Python ValueError:bad marshal data?

Running flexget Python script in Ubuntu, I get an error:
$ flexget series forget "Orange is the new black" s03e01
Traceback (most recent call last):
File "/usr/local/bin/flexget", line 7, in <module>
from flexget import main
File "/usr/local/lib/python2.7/dist-packages/flexget/__init__.py", line 11, in <module>
from flexget.manager import Manager
File "/usr/local/lib/python2.7/dist-packages/flexget/manager.py", line 21, in <module>
from sqlalchemy.ext.declarative import declarative_base
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/ext/declarative/__init__.py", line 8, in <module>
from .api import declarative_base, synonym_for, comparable_using, \
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/ext/declarative/api.py", line 11, in <module>
from ...orm import synonym as _orm_synonym, \
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/__init__.py", line 17, in <module>
from .mapper import (
File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/mapper.py", line 27, in <module>
from . import properties
ValueError: bad marshal data (unknown type code)

If you get that error, the compiled version of the Python module (the .pyc file) is corrupt probably. Gentoo Linux provides python-updater, but in Debian the easier way to fix: just delete the .pyc file. If you don't know the pyc, just delete all of them (as root):
find /usr -name '*.pyc' -delete

There also appears to have been some sort of regression in setuptools with use with python 3.7. See for an example - https://github.com/pypa/setuptools/issues/1257
Forcing reinstallation of setuptools fixed this issue for me.
sudo pip3 install --upgrade --force-reinstall setuptools

Just delete
/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/properties.pyc
it is corrupt as the text indicates. You'll probably have to do so as root.
After that start (again as root) run python (2.7):
/usr/bin/python -c "import sqlalchemy.orm.properties"
to recreate this .pyc file.
If you don't recreate the .pyc file, your program starts slower than necessary as the .py file takes longer to load than the .pyc (and a normal user cannot write the .pyc file).

This can happen if you have Python 2.7 .pyc files and you try to load them using Python 3.5. In my case this was a third-party tarball that erroneously included pre-compiled Python 2.7 .pyc files along with the source code.

I get this error in Ubuntu 18.04 Raspberry Pi 3 when I trying update my system typing sudo apt-get update and solve this error just typing:
sudo find /usr -name '*.pyc' -delete
This is remove all .pyc file in my system. Now I typing again sudo apt-get update && sudo apt-get upgrade and I get my update without thie error marshal-data

I resolved a similar error by un-installing and re-installing the Python application I was using, and all dependencies, using the system package manager.
In my case I was using awscli on Debian 9 and the error was "ValueError: bad marshal data (set size out of range)".
I ran as root:
apt-get purge awscli
apt-get autoremove
apt-get install awscli
And then the error was fixed.
I could imagine cases where the broken package might not get removed (for example because it was marked as manually installed, or was a dependency of another application still installed), in those cases this action may not resolve the error. However I thought I should try this way before manually deleting .pyc files the system installed, and I got lucky.

I also got this problem in Windows environment(win 10).
I fixed it by going to the Settings and repairing Python 3.7 with its installer.
Everything works fine since then.
As far as I could recall, I had kept a dash server running when my computer went to hibernation.
Maybe the damage was done in the hibernating process somehow.

I solved this problem by the following procedure :
In the error code message, you can see
from sqlalchemy.ext.declarative import declarative_base cause this error.
So just pip uninstall sqlalchemy and pip install sqlalchemy, problem solved.

It may be because of the damage of the library. Try re-install the package.

I had the same error in a conda environment which traced back to importing the matplotlib package.
simply pip uninstall matplotlib and then pip install matplotlib solved the problem.

Problems importing python-Xlib

I installed a new module and it appears as if one of its dependencies was not already installed. The module is called Xlib.display.
Here is the error message I received:
from Xlib.display import Display
ImportError: No module named Xlib.display
Where can I find this module that I am apparently lacking? Google yielded no leads.
"Edit: I already have that sourceforge module downloaded but I still get the same results.

Please try.
This shall install Xlib
sudo apt-get install python-xlib
Then you can check
>>from Xlib.display import Display
To install PyMouse if you want to control and capture mouse events please use:
sudo easy_install https://github.com/pepijndevos/PyMouse/zipball/master

Below worked for me!
pip install python3_xlib
I have also used pyuserinput for automation which requires this.

I was having the same problem, but the solutions above didn't work for me. Since I had installed python through the anaconda package, when I used:
sudo apt-get install python-xlib
Xlib was still undetectable by python2. The solution in my case was to use:
anaconda search -t conda python-xlib
Then find the package from the anaconda api, mine was erik/python-xlib. Install it using:
conda install --channel https://conda.anaconda.org/erik python-xlib
Then it worked.

On Debian systems install python-xlib.
On other systems there's a high probability that the package carries the same name.

I don't think the Xlib library works in Python 3.
Source:
Requirements
The Python X Library requires Python 1.5.2 or newer. It has been tested to various extents with Python 1.5.2 and 2.0 through 2.6.

I honestly cant explain why this works... but here is the command that got it working for me.
sudo apt-get install python3-xlib
Should not work because xlib apparently does not work with python 3.x, but everything installed alright, so I'm not complaining!

I was looking for the same answer, however after some more digging it seems that XCB (X protocol C-language Binding) will obsolete Xlib in general. From the XCB website:
The X protocol C-language Binding (XCB) is a replacement for Xlib featuring a small footprint, latency hiding, direct access to the protocol, improved threading support, and extensibility.
Fortunately there are python bindings available as python-xpyb in apt or xpyb on PyPi. I've not gotten that far in my project so I haven't tested if this works with Python3, but this is probably the way to go and the proper place to file any Python3 support bugs if necessary.

Scenario:
I was trying to use screenshot functionalities of pyautogui package. I was getting this error:
Traceback (most recent call last):
File "test_screenshot.py", line 1, in <module>
import pyautogui
File ".../miniconda3/envs/myenv/lib/python3.7/site-packages/pyautogui/__init__.py", line 152, in <module>
from . import _pyautogui_x11 as platformModule
File ".../miniconda3/envs/myenv/lib/python3.7/site-packages/pyautogui/_pyautogui_x11.py", line 7, in <module>
from Xlib.display import Display
ModuleNotFoundError: No module named 'Xlib'
Python code (test_screenshot.py):
import pyautogui
img = pyautogui.screenshot('test.png')
Environment:
Ubuntu 16.04 (LTS)
conda 4.5.11
Python 3.7 (Miniconda)
requirements.txt:
certifi==2019.3.9
Pillow==5.4.1
PyAutoGUI==0.9.42
PyGetWindow==0.0.4
PyMsgBox==1.0.6
PyRect==0.1.4
PyScreeze==0.1.20
PyTweening==1.0.3
Solution:
I installed python-xlib package in the conda environment using:
pip install python-xlib
Now test_screenshot.py is running without any error.
Updated requirements.txt:
certifi==2019.3.9
Pillow==5.4.1
PyAutoGUI==0.9.42
PyGetWindow==0.0.4
PyMsgBox==1.0.6
PyRect==0.1.4
PyScreeze==0.1.20
python-xlib==0.25
PyTweening==1.0.3
six==1.12.0