sudo apt-get install python3-setuptools
sudo easy_install3 pip

sudo apt-get install python3-pyqt5 python-sphinx
sudo apt-get install python3-pyqt*
sudo pip3 install spyder

error: command 'i686-linux-gnu-gcc' failed with exit status 1

sudo apt-get install python-dev

pkg_resources.ContextualVersionConflict: (six 1.5.2 (/usr/lib/python3/dist-packages), Requirement.parse('six>=1.9.0'), {'prompt-toolkit'})

sudo pip3 install -U six

**QtPy** is a shim over the various Python Qt bindings. It is used to write
Qt binding indenpendent libraries or applications.The shim will automatically select the first available API (PyQt5, PyQt4 and
finally PySide).You can force the use of one specific bindings (e.g. if your application is
using one specific bindings and you need to use library that use QtPy) by
setting up the ``QT_API`` environment variable.PyQt5
=====For PyQt5, you don't have to set anything as it will be used automatically::>>> from qtpy import QtGui, QtWidgets, QtCore>>> print(QtWidgets.QWidget)PyQt4
=====Set the ``QT_API`` environment variable to 'pyqt' before importing any python
package::>>> import os>>> os.environ['QT_API'] = 'pyqt'>>> from qtpy import QtGui, QtWidgets, QtCore>>> print(QtWidgets.QWidget)PySide
======Set the QT_API environment variable to 'pyside' before importing other
packages::>>> import os>>> os.environ['QT_API'] = 'pyside'>>> from qtpy import QtGui, QtWidgets, QtCore>>> print(QtWidgets.QWidget)"""