title: Import error on 'minpack2' from 'scipy.optimize'
body: <p>I am trying to import minpack2 from the Scipy package within a python script and get this error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "markowitz.py", line 2, in &lt;module&gt;
      from scipy import optimize
    File "/usr/lib/python3/dist-packages/scipy/optimize/__init__.py", line 232, in &lt;module&gt;
      from .optimize import *
    File "/usr/lib/python3/dist-packages/scipy/optimize/optimize.py", line 37, in &lt;module&gt;
      from .linesearch import (line_search_wolfe1, line_search_wolfe2,
    File "/usr/lib/python3/dist-packages/scipy/optimize/linesearch.py", line 18, in &lt;module&gt;
      from scipy.optimize import minpack2
  ImportError: cannot import name 'minpack2' from 'scipy.optimize' (/usr/lib/python3/dist-packages/scipy/optimize/__init__.py)
  </code></pre>
  
  <p>My python version is: Python 3.7.2 (default, Jan 11 2019, 21:31:15)  [GCC 5.4.0 20160609] on linux</p>
  
  <p>Scipy was installed using pip and is on version 0.18.</p>