title: PEP8 import conventions
body: <p>I'm trying to stick to the best practices when it comes to import modules, I'm trying to understand what <a href="https://www.python.org/dev/peps/pep-0008/#imports" rel="nofollow">PEP8</a> says about this. </p>
  
  <p>Let's say my framework has hundred of classes and few dozen of packages. For instance, PyQt5 or sympy would be good candidates... what'd be the best choice from this set?</p>
  
  <p><strong>a) Import everything</strong></p>
  
  <pre><code>from PyQt5.QtCore import *
  from PyQt5.QtGui import *
  from PyQt5.QtWidgets import *
  
  print(QPoint)
  print(QPixmap)
  print(QApplication)
  </code></pre>
  
  <p><strong>b) Import only big packages and using prefixes for the whole application</strong></p>
  
  <pre><code>from PyQt5 import QtCore, QtGui, QtWidgets
  
  print(QtCore.QPoint)
  print(QtGui.QPixmap)
  print(QtWidgets.QApplication)
  </code></pre>
  
  <p><strong>c) Import specific classes from the big packages</strong></p>
  
  <pre><code>from PyQt5.QtCore import QPoint
  from PyQt5.QtGui import QPixmap
  from PyQt5.QtWidgets import QApplication
  
  print(QPoint)
  print(QPixmap)
  print(QApplication)
  </code></pre>
  
  <p>The option a) is discouraged by PEP8, what about b) or c)... what's the PEP8's recomendation about it?</p>